R A Power Solutions, Author at Metal Stitching and Metal Locking Services | RA Power Solutions

Metal Stitching Engine Block Repair in South Africa | Expert Services by R A Power Solutions

R A Power Solutions — Fri, 13 Mar 2026 06:12:59 +0000

Engine block damage is one of the most serious problems that can occur in heavy machinery, marine engines, or industrial equipment. Cracks and structural failures in engine components often lead to expensive replacements and long downtime. Fortunately, modern repair techniques such as metal stitching offer a reliable and cost-effective solution.

In South Africa, industries such as marine, mining, power generation, and manufacturing rely on efficient engine repair services to maintain operational continuity. R A Power Solutions provides advanced metal stitching engine block repair services designed to restore damaged engine components without the need for welding or replacement.

What is metal stitching?

Metal stitching, also known as cold metal repair, is a specialized mechanical technique that repairs cracks, breaks, and damage in cast iron or aluminum components. Unlike welding, this method does not use heat. Instead, technicians install specially designed metal locks and pins across the crack to restore the component’s strength and alignment.

This technique is widely used for repairing:

Engine blocks
Cylinder heads
Compressor housings
Turbine casings
Pump bodies
Heavy machinery frames

Because the process does not generate heat, it eliminates the risk of distortion or further cracking that can occur during traditional welding.

Engine Block window during repairs

Metal Stitching And Metal Locking

Why Engine Blocks Crack

Engine blocks operate under extreme temperature, pressure, and mechanical stress. Over time, these conditions can cause structural damage.

Some common causes of engine block cracks include:

Overheating: Excessive heat can weaken metal and cause expansion that leads to cracks.
Thermal stress: Rapid heating and cooling cycles create internal stress within the metal.
Mechanical load: Heavy operational loads can gradually damage engine components.
Poor maintenance: Lack of proper lubrication and cooling increases the risk of engine failure.
Manufacturing defects: Small imperfections may expand over time under working conditions.

When such damage occurs, replacing the engine block can be extremely costly and time-consuming. Metal stitching offers a practical alternative.

Advantages of Metal Stitching Engine Block Repair

The process of metal stitching has become a preferred repair method for large engines and critical equipment because of its many benefits.

No Heat Process
Since the repair is performed without heat, the original structure of the metal remains intact. This prevents distortion and avoids the creation of new stress points.
Cost-Effective Solution
Repairing a damaged engine block through metal stitching is significantly more economical than replacing the entire component.
Minimal Downtime
Technicians can often perform the repair on-site, which eliminates the need to dismantle large machinery and saves valuable time.
Restores Structural Strength
Special metal locks and pins restore the strength of the cracked component, making it capable of handling operational loads again.
Suitable for Cast Iron Components
Many heavy engines are made of cast iron, which is difficult to weld. Metal stitching is one of the safest repair methods for such materials.

Cracked engine block repair through metal lock

Metal Locking of Broken window

Metal Stitching Process for Engine Block Repair

At R A Power Solutions, the repair process follows a precise engineering procedure to ensure reliable results.

(i) Inspection and Damage Assessment

Engine specialists first examine the crack location, length, and severity to determine the best repair strategy.

(ii) Drilling Along the Crack Line

Technicians drill small holes along the damaged area to prepare the surface for installing metal stitching locks.

(iii) Installation of Metal Locks

Specially designed metal locks are inserted across the crack. These locks pull the cracked sections tightly together.

(iv) Insertion of Stitching Pins

Metal stitching pins are installed to seal the crack and reinforce the repaired section.

(v) Surface Finishing and Testing

The repaired area is finished and pressure-tested to ensure the engine block regains its original strength and sealing capability.

Applications Across Industries in South Africa

Industries across South Africa rely on metal stitching for repairing critical equipment, including

Marine engine repair
Mining machinery maintenance
Power plant engine servicing
Industrial compressor repair
Heavy equipment restoration

Because these sectors operate large engines continuously, reliable repair solutions are essential to prevent long production stoppages.

Metal Stitching and Locking Process

Final Image after metal lock and metal stitching

Why Choose R A Power Solutions for Metal Stitching

R A Power Solutions has built a strong reputation in the field of engine block repair and metal stitching services worldwide. Their team of experienced engineers uses advanced tools and proven techniques to restore damaged engine components efficiently.

Our Key advantages include

Decades of experience in engine repair
Onsite repair services for large engines
Advanced metal stitching technology
Skilled technicians and engineers
Cost-effective repair solutions

Their expertise ensures that cracked engine blocks can be restored to operational condition without the need for costly replacements.

For any information regarding metalock, metal stitching, or engine block repair, please email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs

1. What is metal stitching for engine block repair?

Engineers use metal stitching as a cold repair technique to fix cracks or damage in engine blocks without welding or applying heat. First, they carefully assess the damaged area. Then, they install special metal locks, keys, and stitching pins across the crack to restore the engine block’s strength and alignment. As a result, the process prevents heat distortion and delivers a durable, long-lasting repair solution.

2. Why is metal stitching preferred over welding for engine block repair?

Metal stitching is preferred because it does not involve heat, which means there is no risk of metal distortion, stress, or additional cracks. The process restores the structural integrity of the engine block while maintaining its original dimensions and alignment.

3. Can metal stitching repair large cracks in engine blocks?

Yes, metal stitching can repair small to large cracks in cast iron, steel, and aluminum engine components. In fact, this method is widely used for repairing damaged engine parts. Depending on the severity of the damage, technicians install specialized locks and pins to secure the cracked area. As a result, the repaired section becomes strong, pressure-tight, and reliable for long-term operation.

4. Does R A Power Solutions provide onsite engine block repair in South Africa?

Yes, R A Power Solutions provides onsite metal stitching and engine block repair services. Their technicians repair damaged components directly at the site, eliminating the need to dismantle or transport heavy machinery. This approach significantly reduces downtime and minimizes operational losses.

5. What types of components can be repaired using metal stitching?

Technicians commonly use metal stitching to repair engine blocks, cylinder liners, turbine casings, compressors, pump housings, and other heavy cast components. Additionally, they apply this method to restore parts made from cast iron, steel, or aluminum. As a result, industries such as marine engines, power plants, and industrial machinery can continue operating reliably with repaired components.

The post Metal Stitching Engine Block Repair in South Africa | Expert Services by R A Power Solutions appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Metal Stitching & Metalocking: The Cold-Cure Fix For Cracked Castings 🛠️

R A Power Solutions — Thu, 04 Dec 2025 06:57:22 +0000

Why Metal Stitching Even Matters

Most people say, “Time to scrap and replace,” when a heavy machine casting breaks, a turbine housing splits, or a cast iron engine block cracks. But what if you could fix that broken piece of metal without welding, bending it, or replacing the whole thing? That’s where metal stitching (sometimes called metalocking) comes in. It might save you a lot of money.

Crack Observed in MPI Test

Cylinder Sleeves Crack Observed in MPI

Engine Block Crack Detected in MPI

What Metal Stitching or Metalocking Actually Means

Metal stitching, which is also known as cold metal mending or metalocking, is a tried-and-true way to fix cast iron, steel, aluminum, or other comparable cast parts that are cracked or damaged. This method doesn’t involve welding, which melts metal, adds heat, and can cause distortion. Instead, it employs specially designed metal “keys” or “locks” and stitching pins to mechanically pull the broken sections back together, sealing the fracture and restoring strength.

This procedure goes back to the 1930s, when it was first used to fix oil-field castings where welding with an open flame was dangerous.

How the Process Works (Step by Step)

1. Drilling or stop-holes: Technicians drill holes at the extremities of the crack to keep it from spreading.

2. Making a slot or aperture: A pattern of holes is made along the crack, usually at right angles, and then connected to provide a slot that fits the shape of the metal keys.

3. Putting in Metal Keys and Locks: Special alloy keys are put into those slots and hammered to make a strong bond between the two metals.

4. Stitching with Pins or Studs: Along the fracture line, holes are drilled and threaded, and then interlocking stitching pins or studs are put in. These close the crack and make the joint watertight.

5. Finishing: After the region is secured, it is ground flush, sometimes machined, and finished to bring back its original shape, alignment, and surface integrity.

Crack Observed in Engine Block

Crack Observed in Cylinder Liner of Main Engine

Crack in Liner

Why does it beat welding or replacing it by a long shot

No heat means no distortion:

Since there is no welding or heat, the old casting won’t warp, have any residual tension, or modify its metal structure, which could make it weaker.

Original geometry preserved:

Because the metal isn’t melted or changed too much, the repaired part usually keeps its original alignment, size, and surface finish, which means that re-machining is less likely to be needed.

Strong, leak-proof repair:

The metal stitching and locking make the repair as strong as (or sometimes stronger than) the original casting. Repairs are typically gas-tight or liquid-tight, which is beneficial for engine blocks, pump housings, turbine casings, and other things.

Quick and onsite:

Repairs can typically be done on-site, so you don’t have to take apart big machines or send parts to a workshop. That means a lot less downtime and big savings over replacing parts.

Cost-effective:

Stitching or locking repairs typically cost a lot less than getting a new casting, and you also eliminate the costs of downtime, transportation, and installation.

Where This Method Can Be Used

Metal stitching works across a ton of industrial components:

Engine blocks, cylinder heads, crankcases
Turbine and compressor housings
Pump & gearbox casings
Machine bedplates, press structures, forging frames

Basically, if it’s cast iron, cast steel, or cast aluminum—and cracked—this method might save it. A ship’s engine block may crack, a power plant’s pump casing may break, or a foundry’s press frame may fail.

Why Metal Stitching Makes Even More Sense in 2025

Industries today face massive downtime costs. Welding large castings often leads to distortion, micro-cracks, weakened structure, and costly re-machining. Cold metal stitching avoids all of that. It’s now one of the most preferred emergency repair and maintenance solutions in marine, power, manufacturing, and heavy equipment industries because it’s quick, eco-friendly, and keeps expensive parts in use for years.

A Real-World Win

Imagine a diesel engine block with a massive crack. Most people would write it off as scrap. But with cold stitching — drilling, inserting keys, sealing with pins, pressure testing, and machining — the block comes back as strong as new. Many marine vessels, power plants, and factories around the globe have saved valuable components this way.

Engine Block After Metal Stitching

Engine Block Crack Detected in MPI

When Metal Stitching Might Not Fit the Situation

It’s not magic — a few things can limit it:

If the casting is shattered into many pieces
If the damage is too extensive
If unskilled technicians attempt the repair
If the component will operate under extreme stress, needing deeper analysis

Quality of workmanship matters a lot in this process.

Don’t rush to scrap or weld a cracked engine block, turbine casing, or any expensive casting. Cold-metal stitching is a proven, cost-saving, distortion-free, and long-term solution trusted worldwide. It’s efficient, affordable, and gives old components a new life — exactly why it should be part of every maintenance strategy.

For any information regarding metalock, metal stitching, engine block repair, please email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs

1: What exactly is Metal Stitching / Metal locking—and how does it repair cracked castings without welding?

Metal Stitching / Metal Locking is a “cold-repair” method used to fix cracks or fractures in cast iron, cast steel, aluminium, or similar cast parts. Instead of welding (which melts metal and adds heat), the process uses specially engineered metal “keys,” “locks,” and stitching pins to mechanically draw the cracked parts back together. The crack is sealed, and structural integrity is restored—all without changing the metal’s original thermal properties or causing heat-related distortion.

2: What kind of materials and components can be repaired using this method?

Metal stitching/locking works on a variety of heavy-duty cast components: cast iron, cast steel, and cast aluminium parts. It’s commonly used for things like engine blocks and crankcases, turbine and compressor housings, pump and gearbox casings, industrial machine bedplates, press frames, and many other cast components — basically, any cracked casting that needs structural repair.

3: Is the repair process done onsite, or do I have to send the part to a workshop?

One of the biggest advantages of this method is that repairs can usually be done onsite. There’s often no need to dismantle the entire machine or ship the casting to a workshop. That means reduced downtime, lower transport costs, and faster turnaround—especially valuable in heavy-industry, marine, power-plant, or industrial settings.

4: Will the repaired casting be as strong and reliable as a new one? Can it handle pressure, fluid sealing, and heavy loads?

Yes — when done correctly, metal-stitched/locked repairs are often gas-tight or liquid-tight and restore structural strength comparable to (or sometimes better than) the original casting. Because there is no heat distortion, the original geometry and alignment are preserved. This makes the repair suitable for components under pressure (engine blocks, pump housings, turbine casings, etc.) and supports heavy industrial load-bearing requirements.

5: Are there limitations—like cases when Metal Stitching might not work?

Yes. While it’s a powerful repair method, it’s not magic. If the casting is shattered into many pieces, or if the damage is too extensive (beyond a clean crack), stitching/locking may not be feasible. Also, the quality of the repair depends heavily on the technician’s skill—misaligned drilling, poor key/pin insertion, or shoddy finishing can lead to weak repairs. In high-stress or fatigue-sensitive components, sometimes further stress analysis is needed to decide whether repair or full replacement is safer.

The post Metal Stitching & Metalocking: The Cold-Cure Fix For Cracked Castings 🛠️ appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Metal Stitching and the Use of Keys & Locks in Crack Repair

R A Power Solutions — Thu, 30 Oct 2025 06:10:35 +0000

Metal Stitching, also called Cold Metal Repair or Metal Locking, uses precision mechanical techniques to restore cracked or damaged cast iron, cast steel, and aluminum components without welding or heat. Instead of melting the metal like welding does, this method uses specially designed keys and stitching pins (locks) to pull the cracked metal together and permanently seal the fracture.

This process is trusted in industries like,

Marine engines and crankcases
Power plants and turbine casings
Pump and compressor housings
Heavy industrial machinery

Why Not Welding?

Welding large cast components often causes:

Heat distortion
Loss of strength due to metallurgical changes
Crack expansion or new cracks
Metal stitching avoids heat damage and preserves the original material strength.

How Keys & Locks Work in Metal Stitching

The core of Metal stitching involves installing metal keys (locks) and stitching pins into the crack

Material Used in Metal Locking and Metal Stitching Process

Step-by-Step Explanation:

Step 1: Drilling and Stop-Holing

Small holes are drilled at both ends of the crack.
This prevents the crack from spreading during the repair.

Step 2: Installing “Locks” (Metal Keys)

A series of overlapping slots are machined along the length of the crack.
Technicians insert precision-engineered metal locks (keys) into the slots

Purpose of Keys/Locks:

They mechanically pull both sides of the crack tightly together.
They distribute load and stress evenly across the repaired area.
The locks exceed the strength of the original casting and restore structural integrity

Step 3: Installing Stitching Pins

Holes are drilled perpendicular to the crack.
Technicians screw stitching pins into the holes to fill and seal the crack,

Purpose of Stitching Pins:

They hold the metal in compression.

They make the repair pressure-tight, preventing leaks of oil, coolant, or gas.

Step 4: Surface Finishing

The repaired area machined flush.
After finishing, the repair hides the crack and restores the component to OEM tolerances.

Metal Locking of Broken window

Advantages of Using Keys & Locks in Metal Stitching:

Benefit	Result
No heat involved	No warping or distortion
Strong mechanical reinforcement	Strength equal to or greater than original
Pressure-tight sealing	Ideal for engine blocks, heads, casings
Minimal downtime	No dismantling required—repairs can be done on-site
Cost-effective	Saves 60–80% vs. replacement cost

Where This Method Is Used

Metal stitching with keys and locks is commonly used for:

Cracked diesel engine blocks
Turbine and pump casings
Compressor housings
Marine engine frames and bedplates
Generator casings

Whether the crack is small or several feet long, the stitching process scales to the size and location of the damage.

Metal stitching using precision metal keys and stitching locks is a reliable, proven, and cost-effective cold repair technique. Unlike welding, it involves zero heat—meaning no distortion, no stress, and no change in material properties. This method restores the structural integrity of cracked cast components and saves industries from huge downtime, dismantling, and replacement costs.

And when it comes to execution, RA Power Solutions is one of the leading global experts in metal stitching and metal locking. With four decades of experience and thousands of successful repairs, we specialize in restoring engine blocks, turbine casings, cylinder liners, compressor housings, and other critical equipment right at the site — anywhere in the world.

Metal Stitching and Locking Process

For more information on metal stitching repair of engine block cracks, metal stitching crack repair, engine block crack repair, and Crack in Cylinder Liner, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What is Metal Stitching Crack Repair and how does it work?

Metal Stitching Crack Repair uses specially designed keys and locks to fix cracks in cast iron, steel, or aluminium components.

2. Why use keys and locks for crack repair?

Keys and locks provide strength and prevent crack propagation, offering a durable, heat-free repair solution.

3. Which materials repaired using metal stitching?

It’s ideal for cast iron, steel, and aluminium components such as engine blocks, pumps, and machinery housings.

4. What are the benefits of Metal Stitching Crack Repair?

The process avoids heat distortion, preserves alignment, and delivers a strong, long-lasting repair at lower cost.

5. Is metal stitching better than welding?

Yes, for cast metals—metal stitching is safer, avoids thermal stress, and maintains the integrity of the original casting.

The post Metal Stitching and the Use of Keys & Locks in Crack Repair appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Crack Repair by Metal Stitching – The Trusted Solution for Cast Iron Crack Repairs

R A Power Solutions — Fri, 25 Jul 2025 07:10:33 +0000

Traditional welding procedures typically don’t work well when fixing broken cast iron castings because they cause tension and deformation from the heat. This is when the cold repair method called metal stitching and metal locking really makes a difference. Businesses worldwide use this method as a safe and permanent way to repair cracks in cast iron, eliminating the risks associated with welding.

What does “metal stitching” mean?

Metal stitching, also known as metal locking, uses a cold repair method to fix cracked or damaged cast iron parts effectively. This method doesn’t use heat; thus, there is no possibility of warping or changing the qualities of the material, unlike welding. Technicians often use it to fix cracks in engines, compressors, pumps, and other heavy machinery on the job site.

Onsite metal Stitching in Process

Why Pick Metal Locking to Fix Cast Iron Cracks?

No heat is needed; thus, it’s safe for castings that can’t handle heat.

Strong and long-lasting—brings back original strength
Repair on site—no need to take apart heavy machinery
Cost-Effective—saves money on time and logistics
Our metal stitching crack repair works on everything from industrial engine blocks to marine cylinder heads, and it always gives great results, even in the most important situations.

After Metal Locking and Metal Stitching

The Best Metal Locking and Stitching Services

R A Power Solutions are experts at providing the best metal stitching and locking services for all kinds of cast iron and aluminum parts. We bring unrivaled accuracy and dependability right to your location with our modern tools, professional personnel, and worldwide reach.

The best services for fixing cracks

Need the best services for fixing cracks? Our team of professionals can take care of everything, from tiny hairline cracks to big structural faults. Our portable tools let us fix cracks on site in hard-to-reach places, which cuts down on downtime and boosts production.

Marine Engines and Power Plants are one of the top industries we serve.

Final Image after Metal Lock and Metal Stitching

Global Onsite Crack Repair Services

Our company specializes in onsite crack repair using state-of-the-art metal stitching and metal locking methods. Whether you are located in remote industrial zones or offshore marine locations, we come to you — minimizing equipment downtime and ensuring continuous operation.

Get in Touch Today

Don’t let a cracked casting halt your production or lead to costly replacements. Choose a proven, safe, and long-lasting solution with our crack repair by metal stitching services. Contact us today for the top metal stitching and metal locking services trusted by industries worldwide.

For more information on metal stitching repair of engine block cracks, engine block crack repair, and Crack in Cylinder Liner, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs

1. What exactly is metal stitching (metal locking) and how does it work?

Customers may want a simple, clear explanation of this cold repair method—its steps such as inspection, drilling, inserting keys and studs, and grinding flush to restore the component without heat deformation.

2. Why choose metal stitching instead of traditional welding?

Common concerns include heat-induced distortion, weakening of metal, downtime, cost, and reliability of the repair versus welding. The blog explains metal stitching avoids these issues

3. What types of components and materials can be repaired using this technique?

Customers often ask what materials are suitable (cast iron, aluminum, cast steel, bronze) and what parts—e.g. engine blocks, turbine casings, pump housings, cylinder liners—can be effectively repaired.

4. How long does a typical metal stitching repair take, and can it be done onsite?

Timeframe expectations and whether in‑situ repair is feasible (without disassembling the machine) are frequent queries. The blog highlights speed (often days) and the ability to repair onboard or onsite.

5. Is the repaired component as reliable and strong as a new part or welded repair?

Customers naturally want assurance that the repair results in restored or comparable structural strength, leak-tight performance, and global certifications (e.g. Lloyd’s Register approval) .

The post Crack Repair by Metal Stitching – The Trusted Solution for Cast Iron Crack Repairs appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Engine Block | Cylinder Liner | Crack Repair – RA Power Solutions

R A Power Solutions — Tue, 04 Feb 2025 04:43:38 +0000

RA Power Solutions undertakes crack repair of heavy components onsite with more than 45 years of experience. The team repairs heavy cast components that break into multiple pieces by preparing a new casting and using the metal locking and metal stitching process. They repair seriously damaged cast components and cracks with a guarantee

In case of cracks in cylinder liners, pistons, or cylinder heads in heavy-duty engines, compressors, or turbines there is no need to reject them as now it is possible to repair the crack by a cold process called metal lock and metal stitching. This is a proven procedure of crack repair which has been followed for over 45 years.

We Undertake Crack Repair of the Following Components and Equipment

Components Manufactured out of Cast Iron, Cast Steel, etc.
Cylinder Liners, Cylinder Blocks, and Components Have Higher Hardness.
Piston Manufactured Out of Aluminium
Bronze Components

RA Power Solutions regularly undertakes repair of main engine components, which develop multiple cracks at different locations and lengths.

The following components were damaged and successfully repaired by the Metal Locking/Metal Stitching process

In the case of a main engine, Cylinder liners developed multiple cracks from the outer diameter. The cylinder Liner length and inner diameter were 1500 MM and 600 MM respectively. We measured the cracks from 15 mm to 150 mm. RA Power Solutions Pvt Ltd repaired them successfully using the metal locking and metal stitching process. The repairs perform satisfactorily. The photographs below show the team carrying out the work.
The engine block of the main engine also developed cracks in different locations. These cracks were repaired on board the vessel by Metal Locking and Metal Stitching Process. RA Power Solutions has more than 45 Years of experience in the repair of cracks, developed in the casting of heavy components.

For more information on metal stitching repair of engine block crack, engine block crack repair and Crack in Cylinder Liner please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What is “metal stitching/metal locking” crack repair?

A cold repair process using locks and keys (without heat) to mend cracks in heavy cast components.

2. What kinds of components can RA Power Solutions repair?

Cast iron, cast steel parts; cylinder liners/blocks; aluminium pistons; and bronze components.

3. How large can the crack or damaged area be for repair?

— Cracks ranging from about 15 mm up to 150 mm in length, including serious damage and broken casting pieces, are repairable.

4. The repair done onsite or must the component be transported?

RA Power Solutions carries out the repair onsite. The team also works on board vessels using the metal stitching/locking process.

5. Is there a guarantee on the repaired parts?

— Yes, the repairs come with a guarantee.

The post Engine Block | Cylinder Liner | Crack Repair – RA Power Solutions appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Crack Repair Of Cylinder Liners By Metal Locking And Metal Stitching | RA Power Solutions

R A Power Solutions — Tue, 04 Feb 2025 04:39:52 +0000

RA Power Solutions, with 45 years of presence in the international market, has been successfully repairing heavy cast iron, aluminum, bronze, and cast steel components using the metal locking and metal stitching process. This is a cold process and no heat is generated.

The crack repair developed in high-casting components is executed onsite without dismantling the main equipment. RA Power Solutions has developed special alloy keys and locks that have almost ten times more strength than the original casting. Now it is possible to repair the cracks that develop in large, heavy-duty cylinder liners. The cracks repaired are mainly in the non-operational area of the cylinder liners. The repair of cracks in large cylinder liners has become popular, as in most cases, it is not possible to arrange the replacement of the cracked liners with new ones.

RA Power Solutions has saved a number of engines by repairing damaged cylinder liners. Our technicians repair cracks using our metal locking and metal stitching process

Metal Stitching and metal locking

We regularly undertake the repair of engine blocks, compressors, and all cast iron, bronze, and aluminum components for the following engine makes:

Akasaka
Mitsubishi
Daihatsu
Yanmar
Hanshin
Kobe Mitsubishi
Caterpillar
Wartsila
Deutz-KHD
Volvo Penta SKL
MAK
Sulzer
MAN B&W
SKL
MTU MAK
Pielstick

We have been regularly providing metal stitching, metal locking, metal surgery, and repair services in Iraq, Iran, Dubai, Oman, Saudi Arabia, Singapore, Russia, Qatar, Abu Dhabi, Sharjah, Ajman, Umm Al-Quwain, Fujairah, Bahrain, Gambia, Kuwait, Antigua and Barbuda, Belize, Dominica, Dominican Republic, Malaysia, Indonesia, Madagascar, Vietnam, Grenada, Guyana, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, South Korea, Saint Vincent and the Grenadines, Trinidad, and Tobago, etc.

For more details on the repair of engine blocks, metal surgery, Crack Repair Of Cylinder Liners and MAN engine cylinder liners, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What materials does RA Power Solutions repair using metal locking/metal stitching?

— Cast iron, aluminum, bronze, and cast steel components.

2. Does RA Power Solutions generate heat when repairing cracks?

— No, their metal locking/metal stitching process is a cold repair method.

3. Can cylinder liner cracks be repaired without dismantling the main equipment?

— Yes, RA Power Solutions repairs cracks onsite without dismantling the main equipment.

4. Do the keys and locks used in the repair have strength comparable to the original casting?

— Yes, RA Power Solutions uses special alloy keys and locks that are nearly ten times stronger than the original casting.

5. For which engine makes does RA Power Solutions regularly perform cylinder liner crack repairs?

— They work on liners from makes like Akasaka, Mitsubishi, Yanmar, Caterpillar, MAN & B&W, MTU, Sulzer, etc.

The post Crack Repair Of Cylinder Liners By Metal Locking And Metal Stitching | RA Power Solutions appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Crack Repair Of Aluminium | Bronze And Cast Iron Component By Metal Lock & Metal Stitching

R A Power Solutions — Tue, 04 Feb 2025 04:35:51 +0000

RA Power Solutions is one of the oldest companies based in New Delhi, India, undertaking crack repairs of damaged heavy components, manufactured out of cast iron, bronze, aluminium, and cast steel by cold process of metal lock and metal stitching.

Metal stitching and metal locking is a simple but proven process of repairing cracks in heavy components without following the wielding method, which generates excessive heat.

We observe that heavy components made of cast iron, bronze, cast steel, and aluminium often get damaged due to accidents. When the damaged portion of the casting breaks into pieces, replacement with a new component is usually not possible. A new part is expensive, takes time to manufacture, or belongs to obsolete equipment.

RA Power Solutions has experienced technicians who cut off the damaged portion of the component completely. They make a new casting of cast iron, cast steel, or aluminium as per the original component and bring it to the site. The team assembles the new casting properly and metal stitches it using the best quality metal keys and locks.

The photographs shown in this blog are of MAN main engine model SMIT MAN R666W (Main Engine Port Side) which met with a serious accident. In this case, we have successfully repaired the engine block, cylinder liner, and piston having multiple cracks, lengths measuring from 75 mm to 190 mm.

Advantages of repair of damage casting and crack by metal lock and metal stitching process.

This method of crack repair is the cheapest and can be executed in a short time. Onsite metal stitching repair is undertaken using our in-house trained technicians and consumables. Crack repair and repair of damage casting can be done in any part of the world and on board the vessel as our technicians have valid passports and seaman books. The process of crack repair by metal lock and metal stitching is approved throughout the world including Lloyds.

For more details regardingCrack repair in cast iron, crack repair of aluminium and cast iron repair by metal lock and metal stitching, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What materials does RA Power Solutions repair using metal locking/metal stitching?

— They repair components made of aluminium, bronze, cast iron, and cast steel using this cold-repair process.

2. How do they handle components that are broken into pieces?

— They cut off the damaged portion, fabricate a new casting, then fit it back and stitch/lock it in place.

3. Does this process generate heat like traditional welding?

— No, metal locking and metal stitching repair is a cold process without heat.

4. Can RA Power Solutions perform repairs onboard vessels or at remote sites?

— Yes, their technicians travel globally (including vessels) and carry out onsite repairs.

5. What crack lengths have they successfully repaired in engine blocks or liners?

— They repaired multiple cracks ranging from 75 mm up to 190 mm in length in severe damage cases.

The post Crack Repair Of Aluminium | Bronze And Cast Iron Component By Metal Lock & Metal Stitching appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Cylinder Liner | Engine Block | Crack Repair Of Man Main Engine | Metal Lock And Metal Stitching

R A Power Solutions — Tue, 04 Feb 2025 04:32:06 +0000

RA Power Solutions was informed about a serious accident on a vessel damaging SMIT MAN R666W (Main Engine). The cylinder liner and Engine block housing developed multiple cracks. Two technicians having experience of 45 years in crack repair by metal stitching and metal locking were deputed on board a vessel.

The following are the main observations after the inspection of the cylinder liners and engine block:

The damaged cylinder liners and cylinder block were subjected to a crack detection test by MPI. RA Power Solutions uses a high-intensity Magna Flux torch to detect the cracks. Our technicians are also level three qualified to undertake the MPI test.

The details of the crack observed in the cylinder liners and cylinder block of the MAN main engine are as follows:

Cylinder Liners: A crack having a length of approximately 150 mm was observed.
In the case of the engine block, two numbers of cracks were observed.

A crack having a length of about 120 mm was observed in the cylinder liner sitting area on a fuel pump side.
A crack measuring about 130 mm was observed in the cylinder liner sitting area on the exhaust side.

Metal Locking And Metal Stitching

The hardness of the cylinder liner was observed between 220-250 HB.

Repair undertaken by RA Power Solutions:

In the case of cylinder liners, the crack was repaired from the inside and from the outer diameter as well by a metal lock process. We used special alloy locks and keys to repair the crack.

The two cracks in the engine block liner sitting area were repaired by a metal lock. After repairs, the proper grinding and polishing were done on the crack area to maintain the specified tolerance.

The liners were assembled in the presence of our technicians. The engine was put into operation after the leak test. The performance of the engine after crack repair of cylinder liners and engine block is observed satisfactory.

We have successfully executed hundreds of jobs. These include damaged and cracked cylinder liners, pistons, engine blocks, and major components used in heavy equipment.

We offer our services across a wide range of countries, including Singapore, Dubai, Bahrain, Bangladesh, the United Arab Emirates (UAE), Indonesia, Gambia, Iraq, Iran, Qatar, Kuwait, Malaysia, Egypt, Nigeria, Mozambique, Saudi Arabia, Oman, Turkmenistan, Jordan, and Kazakhstan.

For more information regarding cylinder liners, engine block crack repair, and crack repair of MAN main engine, please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What size cracks in MAN main engine cylinder liners and engine blocks has RA Power Solutions successfully repaired?

They repaired cracks up to 150 mm in cylinder liners, and around 120-130 mm in the engine block liner areas.

2. Which test does RA Power Solutions use to detect cracks in engine blocks and cylinder liners?

They use MPI (Magnetic Particle Inspection) with high-intensity MagnaFlux torches.

3. What materials and repair methods does RA Power Solutions use for MAN engine crack repairs?

They use cold repair methods — metal locking and metal stitching with special alloy keys and locks.

4. How do they ensure repaired MAN engine components meet operational standards post-repair?

They grind, polish, perform leak tests, and reassemble under supervision to maintain specified

5. How much experience does RA Power Solutions have in repairing main engine cracks onboard vessels?

Their technicians bring 45 years of combined experience in metal stitching and metal locking, including performing such repairs onboard vessels.

The post Cylinder Liner | Engine Block | Crack Repair Of Man Main Engine | Metal Lock And Metal Stitching appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Cast Iron Cylinder Head Repair | Cast Iron Head Repair

R A Power Solutions — Mon, 03 Feb 2025 11:48:14 +0000

RA Power Solutions specialists in rebuilding damaged cast iron cylinder heads, which are important components that seal the engine’s combustion chamber and boost performance.

Over time, cast iron heads can develop cracks, warping, or other damage due to overheating, stress, or wear. That’s where our expert team steps in. With over 45 years of experience, RA Power Solutions uses advanced metal stitching (metal locking) techniques to restore structural integrity — without the risks associated with welding.

Cast Iron Cylinder Head Repair

At RA Power Solutions, we fix broken engine parts called cylinder heads. Imagine a cylinder head like a cap on a bottle- it keeps everything inside safe. Sometimes, these cylinder heads, made of strong cast iron, can get damaged. That’s where we come in! Our experts at RA Power Solutions know how to mend and make them strong again. We use special tools and skills to fix the cracks and make the cylinder head work like new. So, if your engine’s cylinder head is not feeling well, bring it to us, and we make it healthy again.

Cast Iron Head Repair

Cast Iron Cylinder Head Repair by RA Power Solutions is a service that helps fix broken or damaged cast iron heads, and engine block liners of engines. If the head of your engine is cracked, chipped, or not working properly, RA Power Solutions can help make it as good as new. They use special techniques and skilled experts to mend the cast iron head, ensuring it works well, and your engine runs smoothly. Trust RA Power Solutions for reliable and effective cast iron head repairs by metal lock and metal stitching process.

Our Repair Process Includes:

Thorough inspection and crack detection
Cold repair using metal stitching, preserving original metallurgy
Surface machining and pressure testing
Reassembly and testing for performance assurance

For more information on Cast Iron Head Repair, Cylinder Head Repair and cylinder heads please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What kind of damage can RA Power Solutions repair in cast iron cylinder heads?

Cracks, chips, worn valve seats or guides in cast iron cylinder heads.

2. Which repair method does RA Power Solutions use for cylinder heads to avoid heat damage?

They use cold processes like metal locking and metal stitching.

3. Does RA Power Solutions inspect cylinder heads before repairing them?

Yes, they perform chemical cleaning, blasting/blasting, and crack detection via MPI (Magnetic Prticle Inspection).

4. Are the repaired cylinder heads guaranteed to perform satisfactorily?

Yes,all repairs of cylinder heads by RA Power Solutions come with a guarantee of satisfactory performance.

5. Can RA Power Solutions supply reconditioned cylinder heads, and of which engine makes?

Yes,they maintain stock of reconditioned cylinder heads for makes like Wartsila, MAN, Caterpillar, B&W, Deutz, MTU, Cummins, Yanmar, etc.

The post Cast Iron Cylinder Head Repair | Cast Iron Head Repair appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Cast Iron Repair | Aluminum | Bronze Crack Repair | Metal Lock | Metal Stitching

R A Power Solutions — Mon, 03 Feb 2025 11:45:26 +0000

Metal Locking and Metal Stitching is the process by which cracks or damaged, broken cast iron, bronze, and aluminum components can be repaired. We have been extending services for metal locking and metal stitching for turbine-generating equipment, large water pumps, forging equipment, and various components of high-capacity diesel-generating sets. All these years, we have been regularly repairing cracks and seriously damaged components manufactured out of aluminum, bronze, and cast iron by the metal locking and metal stitching process. We use the latest technology, processes, and consumables for successful and guaranteed repairs.

All the repairs executed by us are on-site and without disassembly of the main equipment.

The procedure for metal locking and metal stitching of damaged components, as followed by RA Power Solutions, is as follows:

A drilling fixture is attached at right angles to the crack. A hole pattern is drilled and repeated at intervals of 3/4 to 1-1/4 inches apart.
The metal between each drilled hole is removed with the help of pneumatic tools to form a slot. The stock removed is narrower than the drilled hole, thus forming a serrated opening.
We insert preformed locks of high-tensile alloy into the drilled slot. We peen the locks into the slots one on top of the other in an overlapping pattern. The casting thickness limits the depth, and we determine it by the required strength.
After the locks are installed, holes are drilled and tapped, and threaded fasteners are applied. These are spotted along the entire length of the crack, overlapping one another. Their purpose, in part, is to fill the fracture with new metal and provide a pressure seal.
The entire repair area is peened flush and finished ground. Painted if required.

Cast Iron Repair

The Metal Locking technique can be used to repair everything from casting faults. The broken machinery and improper machining to intricate items such as marine engines and gears. We can work on a wide array of materials, including work-hardened and heat-treated items.

RA Power Solutions extend Cast Iron Repair, metal stitching/ metal locking services all over the world including countries like Dubai, Oman, Saudi Arabia, Qatar, Abu Dhabi, Sharjah, Ajman, Umm Al-Quwain, and Fujairah, Bahrain, Kuwait, Iraq, Antigua and Barbuda, Belize, Dominica, Dominican Republic, Grenada, Guyana, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad, and Tobago, etc.

For more information on metal surgery, metal lock, and metal stitching, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

FAQs:

What materials does RA Power Solutions repair using metal locking and metal stitching?

Cracks, chips, worn valve seats or guides in cast iron cylinder heads.

Which repair method does RA Power Solutions use for cylinder heads to avoid heat damage?

They use cold processes like metal locking and metal stitching.

Does RA Power Solutions inspect cylinder heads before repairing them?

Yes,they perform chemical cleaning, blasting/blasting, and crack detection via MPI (Magnetic Particle Inspection).