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.

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.

1. 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.
2. Cost-Effective Solution
   Repairing a damaged engine block through metal stitching is significantly more economical than replacing the entire component.
3. Minimal Downtime
   Technicians can often perform the repair on-site, which eliminates the need to dismantle large machinery and saves valuable time.
4. Restores Structural Strength
   Special metal locks and pins restore the strength of the cracked component, making it capable of handling operational loads again.
5. 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.

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.

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

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.

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:

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

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:

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.

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.

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

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:

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.

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:

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

In the past, technicians repaired cracks in cast iron with the traditional welding process. The industry no longer practises this method because welding repairs do not always deliver successful results.

We undertake onsite cast iron repairs and repairs of aluminium and cast steel. All the repairs undertaken by a cold process.

The main advantages are as follows:

Benefits of cast iron repair, aluminium casting, and steel casting repair by metal lock and metal stitching

• Cast iron repair and damage casting repair are possible on site, and there is no requirement to disassemble of damaged component from the main equipment and send it to the designated workshop.
• RA Power Solutions follows the metal stitching and metal locking process to repair cracks in grey iron, steel casting, or aluminium. The process is cold, and it does not generate heat.
• Since the cast iron repair by metal stitching and metal locking is a cold process, there is no loss of alignment or change in the original profile of the component.
• In most cases, there are no need for machining after the damage or crack casting is repaired. This is of great benefit in comparison to the welding process followed by a few companies for crack repair.
• The cast iron crack repair by metal stitching and metal locking process restores to its original strength of the casting and is a watertight and gas-tight repair.
• We execute cast iron crack repairs in minimum time. Our process drastically reduces the downtime of the equipment and the entire plant.

We repair cracks in the casting of grey iron, steel, or aluminium. A few applications mentioned below:

• Repair of cracked engine block, inspection window, liner sitting area in entablature, etc.
• Repair of damaged cylinder liners, pistons, cylinder head, and turbine casing.
• Repair of damaged heavy industrial machinery.
• Repair of damaged gearboxes and pump casings manufactured of Aluminium, cast steel, and grey cast iron.
• We successfully repair all types of cracks in cast iron, aluminium casting, and steel casting.

For more information on cast steel casting, the method of repairing cracks, metal surgery, damaged casting repair in Gambia, and metal stitching, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

FAQs:

The post Repair Crack Cast Iron | Metal Locking and Metal Stitching: 4 Decades of Expertise appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

In case of cracks repair in casting and repair of damaged heavy components, the consumables like locks, keys, master locks, etc, used must be of high tensile, again the job of metal stitching and metal locking is to be executed by experienced technicians.

RA Power Solutions has excellence in both areas. We import keys, locks, and master locks from Europe. These are sourced from companies with over a hundred years of experience. We have in-house technicians who specialize in crack repair by metal stitching and metal locking. They have been executing this work for more than forty-five years.

RA Power Solutions is the only company that can also execute the crack repair by metal stitching & metal locking onsite. The repairs are also possible while sailing the vessel.

The broad range of applications of crack repair by Metal Stitching/Metal Locking is as follows:

• Damaged engine bed plate, cylinder head, turbine casing, etc.
• Repair of heavily damaged industrial equipment.
• On-site repair of all the machinery installed on the vessel.
• Repair of damaged pump casings, gearboxes, and forging hammers.

We have been regularly executing metal stitching/ metal locking & repair services in 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 engine block stitching, repairing cast iron, and turbine casing crack repair on site, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

The post Cast Iron Repair | Repair Of Damaged Casting | Metal Lock | Metal Stitching appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

We undertake the repair of the damaged and cracked engine block by metal stitching and metal locking process, the advantage of which is as follows.

Repair Of Cracked And Damaged Engine Block By Metal Stitching And Metal Lock Process:-

The repair by metal lock and metal stitching technique is a proven method. It is used for repairing damaged engine blocks, turbo casings, cylinder liners, pistons, and other major spares of diesel engines and heavy mechanical equipment.

The area of the crack must be identified and marked. We undertake crack detection by MPI and the dye-penetrant method, depending on the thickness of the casting. When necessary, we perform metal stitching on both sides of the damaged area. We provided that there is sufficient space for the approach of our pneumatic tools.

RA Power Solutions uses high-quality metal keys, metal locks, and consumables. Combined with the expertise of our experienced technicians, this ensures successful repairs through metal stitching and metal locking.

We have been regularly undertaking repair of engine blocks, compressors, turbochargers, and all cast iron, bronze, and aluminium for the following makes of engines:-

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

We have been regularly executing the repairs in Argentina, Bahamas, Barbados, Bermuda, Bolivia, Brazil, Canada, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala, Guyana, Haiti, Honduras, Jamaica, Mexico, Nicaragua, etc.

Mr. Shahani is a highly experienced business leader with 45 years of rich experience in the field of Power, Heavy, and Shipping industry. He is a Technical Adviser to many shipping and heavy industries across the globe.

Mr. Shahani is one of the most enthusiastic professionals, and he has all the brilliance of an exemplary leader. Mr. Shahani is an extremely effective coach and mentor of teams and is adept at providing leadership in a global, cross-cultural environment.

For more information on metal locking a cracked engine block, cracked engine block repair, repair of damaged engine block, metal stitching technique, or cracked and damaged engine block, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at 9582647131 or 9810012383.

FAQs:

The post Cracked Engine Block Repair By Metal Stitching | Metal Lock | RA Power Solutions appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

Crack Repair Process For Aluminium | Bronze Components:-

The damaged casting component is visually inspected by our experienced technicians.

It is necessary to remove the paint or red oxide from the crack area of the component. This is done by use of special chemicals.

The Crack Detection Test Of The Cracked Area Is Undertaken By Following Two Methods:-

• MPI test with high-intensity magnaflox torch.
• The crack test is done by in-house experienced technicians who are qualified as level 2 or level 3 technicians.
• Crack detection by conventional dye-penetrant test.

Planning and execution of crack repair by metal stitching and metal locking process:-

Once the area of crack is identified, we undertake the crack repair by metal stitching and metal locking process. This again is undertaken by our experienced technicians.

We have technicians available around the clock. Some of them have over 45 years of experience in undertaking crack repairs of engines, compressor pumps, heavy components, and badly damaged castings.

RA Power Solutions has undertaken hundreds of jobs of damaged casting repair by fixing the new casting piece in place of the damaged area.

Our success rate in repairing cracks and badly damaged castings using the metal lock and metal stitching technique is almost 100%. All crack repair jobs undertaken by us are guaranteed for satisfactory performance. The crack repair of engine components, compressors, and marine equipment can be undertaken on vessels even while sailing.

All technicians have valid Indian CDC and can board the vessel in a short time.

We have been regularly executing the repairs in Benin, Ghana, Burkina Faso, Ivory Coast, Nigeria, Mali, Liberia, Guinea, Niger, Cameroon, Equatorial Guinea, Sierra Leone, Gabon, Guinea-Bissau, Senegal, Gambia etc.

This blog is written by Mr. Raj Shahani (Managing Director of RA Power Solutions India Pvt. Ltd.).

Mr.Shahani is a highly experienced business leader with 45 years of rich experience in the field of Power, Heavy, and Shipping industries. He is a Technical Adviser to many shipping and heavy industries across the globe.

Mr. Shahani is one of the most enthusiastic professionals, and he has all the brilliance of an exemplary leader. He is an extremely effective coach and mentor of teams and is adept at providing leadership in a global, cross-cultural environment.

For more queries on Aluminium Piston Crack Repair, repairing a crack in casting, metal stitching process, crack repair techniques, and repair of a crack in cast iron casting contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

FAQs:

The post Crack Repair Process For Aluminium | Bronze And Aluminium Components | Ra Power Solutions appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.

RA Power Solutions technicians visited the island and undertook the inspection as per the following details:

• Inspection of engine block/entablature of Wartsila engine, model 12V32.
• On a visual inspection by our technicians, it was observed that the engine block developed multiple cracks near the inspection window.
• A piece measuring 590 mm X 360 mm was damaged from the entablature casting and came out.
• Our qualified technicians cleaned the surface area thoroughly, even the paint and the red oxide were removed.
• The MPI was done for crack detection and all the cracks were clearly identified.
• The measurement of broken casting was also taken.

The details of the crack observed are as follows:-

• Multiple cracks having a length ranging from 20 mm to 430 mm were observed.
• The discipline profile of the damaged portion of the Wartsila engine block was given by cutting and grinding the final dimensions which were observed as 660 mm X 396 mm.

Non-availability of Wartsila 12V32 engine block

Diesel engines are in operation all over the world in power plants, ships, heavy engineering industries, etc. The breakdown of the engine happens either due to mishandling, material defects, or poor maintenance of the engine. This results in a major breakdown, which can be devastating.

These types of accidents cause severe damage to the engine component or even injuries to the operator present in the engine room.

The concentrated heat caused by the welding process also results in the expansion and contraction of the casting, developing the stresses in the engine block/entablature.

Prior to the arrival of RA Power technicians on site, the owners of the Diesel power plant explored various possibilities of repair, including repair by welding process. Our technicians explained the difficulty in repairing the engine block, which is manufactured out of cast iron by the welding process. Cast iron contains a high level of carbon, which burns when the repair of casting is undertaken by a welding process.

In some cases, the welding due to the high-temperature process also results in the hardening or rather development of more cracks. We have also experienced that due to stress and contraction, there is a significant loss of the centreline of the main journal housings of the block, which is of great importance.

Repair of Wartsila 12V32 engine block by metal stitching and metal locking process

The repair of engine block and entablature of Wartsila engine model 12V32 was undertaken by metal stitching and metal locking process which is a proven cold repair method of repairing heavy cast iron casting, aluminium casting, Broken Engine Block and steel cast components.

Different types of specially designed screws and locks are used in crack and damaged casting repair in the metal stitching and metal locking process. The multiple cracks as per the details mentioned above were repaired by the metal stitching process. The damaged area of the Broken Engine Block was fitted with a new piece of casting and was metal stitched. The engine was put on load after the repairs by metal lock and metal stitching process and performance was observed as satisfactory. This job of repairing of Wartsila engine block/ entablature of 12V32 was executed in the Year 2013 and since then it has been performing satisfactorily. The client has not only saved a considerable amount by avoiding the purchase of a new engine block but also saved on downtime as they are in the business of power generation for the islands based in the Maldives.

RA Power has a dedicated team of experienced technicians headed by an engineer with more than 44 years of experience in the repair of cracks in cast iron, aluminium cast steel, and steel casting by metal stitching and metal locking.

All our technicians have valid CDC and can fly to any destination on short notice. The portable, lightweight pneumatic tools are carried by them as accompanied baggage. We have been regularly executing the repairs in Madagascar, Oman, Qatar, Philippines, Bahrain, Sri Lanka, Bangladesh, Myanmar, Turkey, Nigeria, Greece, Saudi Arabia, UK, Dubai, Malta, Cyprus, Singapore, Malaysia, Colombia, Indonesia, Hong Kong, Spain, Netherlands, Dubai, Portugal, Estonia, Morocco, Belgium, Vietnam, Canada.

This blog is written by Mr. Raj Shahani (Managing Director of RA Power Solutions India Pvt. Ltd.).

Mr. Shahani is one of the most enthusiastic professionals, and he has all the brilliance of an exemplary leader. He is an extremely effective coach and mentor of teams and is adept at providing leadership in a global, cross-cultural environment.

For more information on repair cast iron, cast iron stitching, cast iron engine repair, cast iron crack repair, cold metal stitching, cast iron engine block metal lock, broken engine block, and metal surgery contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

The post Cast Iron Repair | Broken Engine Block by Metal Stitching appeared first on Metal Stitching and Metal Locking Services | RA Power Solutions.