Engine Overhaul, Maintenance and Repair
Complete overhaul and maintenance for main and auxiliary engines including MAN B&W, Wärtsilä, Yanmar, Cummins and Caterpillar.
The marine engine is the heart of any vessel, operating continuously under harsh conditions and heavy loads. Over time, critical components such as pistons, cylinder liners, bearings, valves, and fuel systems inevitably suffer from natural wear, causing power loss, high fuel consumption, and potential risks of major breakdowns at sea.
To ensure safe voyages and optimize vessel operating costs, ANSAC’s Main & Auxiliary Engine Overhaul, Maintenance, and Repair service delivers comprehensive technical solutions fully compliant with strict international class society requirements.
Technical Scope of Engine Services at ANSAC
1. Main Engine Overhaul & Repair
- Inspecting, measuring technical clearances, and assessing the overall wear of the diesel engine system.
- Pulling pistons, inspecting piston rings, cleaning, and measuring ring groove clearances.
- Measuring wear, checking ovality, and honing/degazing cylinder liners.
- Pressure testing and Non-Destructive Testing (NDT) of cylinder heads for potential micro-cracks.
- Grinding and machining valve seats, and replacing inlet/exhaust valves when worn beyond tolerance limits.
2. Auxiliary Engine & Diesel Generator Overhaul
- Routine maintenance based on running hours (10,000h, 20,000h, 40,000h intervals) for marine generators.
- Inspecting and replacing crankshaft main bearings and connecting rod bottom-end bearings.
- Adjusting fuel injection timing, maintaining and testing fuel injection pumps and injectors on specialized test benches.
- Simultaneous overhauling and dynamic balancing of the associated Turbocharger system.
3. Auxiliary Engine System Repairs
- Cleaning, servicing, and pressure-testing charge air coolers, lube oil coolers, and jacket water coolers.
- Overhauling and restoring marine pumps: cooling water pumps, lube oil pumps, and fuel transfer pumps.
- Troubleshooting and timing alignment of camshafts and gear trains.
Engineering Capabilities and On-site Tooling
ANSAC utilizes advanced diagnostic tools and precision machining equipment for all engine works:
- Portable high-precision valve and seat grinding machines ensuring perfect sealing.
- Digital cylinder bore gauges and internal combustion chamber borescope inspection systems.
- Non-Destructive Testing (NDT) equipment (Magnetic Particle & Ultrasonic testing) for detecting internal stress cracks in crankshafts, engine blocks, and cylinder heads.
- Standard testing rigs for heavy-duty fuel pumps and fuel injectors.
Why Choose Engine Services from ANSAC SHIP REPAIR?
- Highly Qualified Workforce: Our marine engineers and technicians possess extensive field experience with prominent marine engine brands including MAN B&W, Wärtsilä, Sulzer, Yanmar, Daihatsu, Caterpillar, and Mitsubishi.
- Rapid Emergency Response: Strategic location in the port city of Hai Phong allows us to dispatch our flying squads to vessels at anchorage, berths, or shipyards 24/7, drastically minimizing vessel downtime.
- Transparent Verification & Class Survey Support: All calibration data before and after repair are carefully documented and delivered via comprehensive technical reports, ready for submission to ship owners and classification societies (VR, NK, Lloyd's, DNV, ABS, etc.).
ANSAC's Commitment: "We do not just provide temporary fixes – we fully restore the maximum efficiency, reliable performance, and longevity of your vessel’s propulsion and power systems."