Highly Specialized Service, Easily Accessible

Fast, reliable solutions that come right to your site.

MaK employee working in facility
MaK employee working in facility

In-Situ Machining Reliable Solutions

In-Situ Machining is a shortening of the phrase “in the situation machining.” This easily accessible special service comes directly to you, so there’s no need to remove massive engine parts just to send out for repair. We provide original equipment manufacturer (OEM)-certified, classification-approved machining for parts like crankpins and cylinder liner fits to provide you with workshop-quality results without ever leaving your location. This helps reduce downtime, cut costs, and ensure everything meets the OEM-certified specs by using our own genuine parts. These aren’t just spare parts, but real solutions brought right to your site.

 
 
 
 

What In-Situ Brings to Your Site

 

Discover the features that come with this specialized service.

 


 

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OEM-Certified Execution

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Workshop-Grade
Quality On-Site

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Structured and Documented Process

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Global Deployment Capability

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Ability to Integrate with Scheduled Maintenance

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Holistic Inspection to Flag Potential Issues

 
 
 
 
 

In-Situ Solution Benefits

The In-Situ Service Solution is no last resort. In fact, it’s the opposite: a premium solution that provides genuine customer focus, OEM-certification, and workshop-level quality delivered directly to your site.

Reduced Downtime

Fast on-site machining keeps operations running and minimizes disruption. 

Cost Efficiency

No need for disassembly, transport, or external workshop logistics. 

Flexibility in Emergencies

Rapid response and spare part delivery — even for non-stock items.

Warranty Protection

OEM-compliant work maintains warranty coverage — unlike third-party repairs. 

Frequently Asked Questions

Engine optimization is a tailored upgrade package that combines the technical solution, required spare parts, and compliance support for your specific engine and operating profile. Depending on your needs, upgrades can include retrofit kits—such as updated injection systems, emissions solutions like SCR for NOx reduction, methanol direct injection for CO₂ reduction, and software/controls updates—plus options for digital connectivity and guidance on meeting IMO regulations and class requirements.

We start with your operational goals—fuel savings, compliance, image—and constraints like vessel type, operating profile, and regulatory environment. Our teams then evaluate your engine and use simulation and thermodynamic analysis to recommend a solution that fits your case and budget, giving you a practical path to performance, compliance, and efficiency.

Upgrade kits are designed to be compatible with engines in the field, so all projects do not require a full engine replacement. Installations are planned for manageable effort and minimized downtime. The exact scope and timeline will be determined following an on-site evaluation of your engine configuration.

Yes. Our solutions—SCR Technology, IMO Tier II upgrade, Methanol/ Ethanol direct injection, and more—are engineered to reduce emissions and developed with future regulatory readiness in mind, so you can operate confidently today while preparing for tomorrow.

Every upgrade is verified by our engineering: combustion simulation, thermodynamic analysis, and software-controlled engine management (injection system, turbocharger, control units). Solutions are validated on our test beds under real and extreme conditions, and continuously improved using field data across the product lifecycle.

 

Frequently Asked Questions

Engine optimization is a tailored upgrade package that combines the technical solution, required spare parts, and compliance support for your specific engine and operating profile. Depending on your needs, upgrades can include retrofit kits—such as updated injection systems, emissions solutions like SCR for NOx reduction, methanol direct injection for CO₂ reduction, and software/controls updates—plus options for digital connectivity and guidance on meeting IMO regulations and class requirements.

We start with your operational goals—fuel savings, compliance, image—and constraints like vessel type, operating profile, and regulatory environment. Our teams then evaluate your engine and use simulation and thermodynamic analysis to recommend a solution that fits your case and budget, giving you a practical path to performance, compliance, and efficiency.

Upgrade kits are designed to be compatible with engines in the field, so all projects do not require a full engine replacement. Installations are planned for manageable effort and minimized downtime. The exact scope and timeline will be determined following an on-site evaluation of your engine configuration.

Yes. Our solutions—SCR Technology, IMO Tier II upgrade, Methanol/ Ethanol direct injection, and more—are engineered to reduce emissions and developed with future regulatory readiness in mind, so you can operate confidently today while preparing for tomorrow.

Every upgrade is verified by our engineering: combustion simulation, thermodynamic analysis, and software-controlled engine management (injection system, turbocharger, control units). Solutions are validated on our test beds under real and extreme conditions, and continuously improved using field data across the product lifecycle.

 

Frequently Asked Questions

Engine optimization is a tailored upgrade package that combines the technical solution, required spare parts, and compliance support for your specific engine and operating profile. Depending on your needs, upgrades can include retrofit kits—such as updated injection systems, emissions solutions like SCR for NOx reduction, methanol direct injection for CO₂ reduction, and software/controls updates—plus options for digital connectivity and guidance on meeting IMO regulations and class requirements.

We start with your operational goals—fuel savings, compliance, image—and constraints like vessel type, operating profile, and regulatory environment. Our teams then evaluate your engine and use simulation and thermodynamic analysis to recommend a solution that fits your case and budget, giving you a practical path to performance, compliance, and efficiency.

Upgrade kits are designed to be compatible with engines in the field, so all projects do not require a full engine replacement. Installations are planned for manageable effort and minimized downtime. The exact scope and timeline will be determined following an on-site evaluation of your engine configuration.

Yes. Our solutions—SCR Technology, IMO Tier II upgrade, Methanol/ Ethanol direct injection, and more—are engineered to reduce emissions and developed with future regulatory readiness in mind, so you can operate confidently today while preparing for tomorrow.

Every upgrade is verified by our engineering: combustion simulation, thermodynamic analysis, and software-controlled engine management (injection system, turbocharger, control units). Solutions are validated on our test beds under real and extreme conditions, and continuously improved using field data across the product lifecycle.

 

Frequently Asked Questions

Engine optimization is a tailored upgrade package that combines the technical solution, required spare parts, and compliance support for your specific engine and operating profile. Depending on your needs, upgrades can include retrofit kits—such as updated injection systems, emissions solutions like SCR for NOx reduction, methanol direct injection for CO₂ reduction, and software/controls updates—plus options for digital connectivity and guidance on meeting IMO regulations and class requirements.

We start with your operational goals—fuel savings, compliance, image—and constraints like vessel type, operating profile, and regulatory environment. Our teams then evaluate your engine and use simulation and thermodynamic analysis to recommend a solution that fits your case and budget, giving you a practical path to performance, compliance, and efficiency.

Upgrade kits are designed to be compatible with engines in the field, so all projects do not require a full engine replacement. Installations are planned for manageable effort and minimized downtime. The exact scope and timeline will be determined following an on-site evaluation of your engine configuration.

Yes. Our solutions—SCR Technology, IMO Tier II upgrade, Methanol/ Ethanol direct injection, and more—are engineered to reduce emissions and developed with future regulatory readiness in mind, so you can operate confidently today while preparing for tomorrow.

Every upgrade is verified by our engineering: combustion simulation, thermodynamic analysis, and software-controlled engine management (injection system, turbocharger, control units). Solutions are validated on our test beds under real and extreme conditions, and continuously improved using field data across the product lifecycle.

 

Frequently Asked Questions

Engine optimization is a tailored upgrade package that combines the technical solution, required spare parts, and compliance support for your specific engine and operating profile. Depending on your needs, upgrades can include retrofit kits—such as updated injection systems, emissions solutions like SCR for NOx reduction, methanol direct injection for CO₂ reduction, and software/controls updates—plus options for digital connectivity and guidance on meeting IMO regulations and class requirements.

We start with your operational goals—fuel savings, compliance, image—and constraints like vessel type, operating profile, and regulatory environment. Our teams then evaluate your engine and use simulation and thermodynamic analysis to recommend a solution that fits your case and budget, giving you a practical path to performance, compliance, and efficiency.

Upgrade kits are designed to be compatible with engines in the field, so all projects do not require a full engine replacement. Installations are planned for manageable effort and minimized downtime. The exact scope and timeline will be determined following an on-site evaluation of your engine configuration.

Yes. Our solutions—SCR Technology, IMO Tier II upgrade, Methanol/ Ethanol direct injection, and more—are engineered to reduce emissions and developed with future regulatory readiness in mind, so you can operate confidently today while preparing for tomorrow.

Every upgrade is verified by our engineering: combustion simulation, thermodynamic analysis, and software-controlled engine management (injection system, turbocharger, control units). Solutions are validated on our test beds under real and extreme conditions, and continuously improved using field data across the product lifecycle.

 
 

Specialized Machinery, Reliable Results

 

Explore the full In-Situ service portfolio.

Crankpin Machining, 

No Disassembly Required

We offer specialized In-Situ machining of crankpins directly on M 32 Inline, M 32 V-type, and GCM34 engines without disassembly. The process includes grinding, polishing, and  strict quality control in accordance with OEM specifications. Also included are machining fillets and crankpin surfaces, polishing crankpins, oil bore outlets, and fillet areas — all of which followed by a final quality check.

See how it works
crank pin image
crank pin image

Enable performance recovery through optimized engine block and liner fits.

Support restoration of your engine's performance with our precision service for engine blocks. We rework contact and landing surfaces, then restore OEM tolerances by machining, freeze-fitting bushings, and installing shims. This process allows you to use standard cylinder liners. Applicable to M 32, GCM34, M 43, and M 46 DF models.

Get the full breakdown
engine block image
engine block image

In-Situ Metal Stitching Provides Thorough Repair and Quality Control   

Available for all current and legacy engines, In-Situ Metal Stitching is the repair of cracks and damage on large cast components according to OEM specifications. Non-destructive testing identifies damage, followed by precise insertion of pins and locks, as well as optional reinforcement with brackets or ribs.

Explore the solution
Metal stitching image
Metal stitching image

Frequently Asked Questions

In‑Situ Machining is OEM‑certified on‑site machining performed directly at your location. Specialized mobile equipment and trained technicians restore components — such as crankpins or engine block cylinder liner fits — to our original specifications without removing major engine parts. This reduces downtime, avoids transport, and delivers workshop‑grade results on site.

MaK technicians can machine crankpins, engine block liner fits, bearing pockets, and large cast components. Services include machining, grinding, polishing, restoring OEM tolerances if needed adding bushings and shims, and metal stitching repairs for cracks in cast parts.

Yes. All work follows our OEM specifications and is classification‑approved, using certified equipment and structured, documented processes. The result is workshop‑grade quality delivered directly on site.

Yes. Because the service is OEM‑certified and compliant with classification society requirements, warranty coverage and classification status are maintained - unlike third‑party machining that may void warranty protection.

Choose In‑Situ Machining when you need to minimize downtime, avoid disassembly and transport, or address large and hard‑to‑access components. It is ideal for both emergency repairs and planned maintenance, reducing cost and operational disruption while ensuring OEM‑approved quality.

 

Talk to Your Local MaK Dealer Today.

Our global network of MaK Dealers are here to answer any questions you may have about the In-Situ solution.

Contact a MaK Dealer
MaK logo
MaK logo