Main Engine Overhaul by Hai Ha M&S – Optimizing Vessel Performance with Comprehensive

Optimizing Vessel Performance with Comprehensive Main Engine Overhaul

The engine itself is the heart of a ship. It needs to be operated smoothly and stably in order to effectively promote the ship’s productivity. When operating smoothly, it can prolong the life of the engine as well as ensure the safety of the whole ship when sailling on high seas with big waves or bad weather.

To ensure this, it is necessary to have a periodic machine overhaul plan, to improve the machine’s life.

the main engine overhaul is a big and very important issue, before work must plan and work process.

Hai Ha M&S is a leading provider of ship repair services, with extensive experience in main engine overhauls. In this article, we will outline our step-by-step process for overhauling a main engine.

Step 1: Shutdown All Related Systems

The first step is to shut down all related systems, including starting systems, lubrication systems, fuel systems, and exhaust systems.

Step 2: Inspect Shaft Condition

The next step is to inspect the condition of the main engine’s shaft. The inspection involves opening the cover and conducting a thorough check to ensure there is no damage or wear.

Step 3: Remove Cylinder Head

The cylinder head needs to be removed to access the engine’s internal components. Our experienced technicians will disconnect all connections and observe the area carefully before lifting to ensure absolute safety. After the cylinder head is removed, we conduct cleaning and inspection.

Main Engine Overhaul

Step 4: Remove Piston and Connecting Rod

Remove Piston and Connecting Rod

We then remove the piston and connecting rod for cleaning and inspection. This process involves cleaning the piston, measuring and inspecting the oil scraper ring groove for wear, and replacing all piston rings.

Step 5: Crown Piston, Liner, and Gudgeon Pin

In this step, we clean, measure and replace the crown piston, liner, gudgeon pin and bushing if necessary.

Main Engine Overhaul
Crown Piston, Liner, and Gudgeon Pin

Step 6: Install New Liner

We replace the liner after cleaning and measuring the bore diameter. Our technicians take accurate measurements and replace the O-ring before conducting a water test to check the liner’s tightness.

Main Engine Overhaul
Install New Liner

Step 7: Reassemble

Once all the parts have been cleaned, measured, and replaced, we reassemble the engine with precision, ensuring all connections and components are properly installed.

*  With a team of experienced workers at Hai Ha M&S,we are committed to providing high-quality main engine overhauling services to our clients. Our goal is to ensure that your vessel’s main engine operates efficiently and reliably, minimizing downtime and maximizing profitability.

In conclusion, a main engine overhaul is a complex process that requires precision, expertise, and experience. Hai Ha M&S is fully equipped to carry out this task and ensure the smooth operation of your main engine. Contact us for more information on our main engine overhaul services.


Office: 44/82 – Vu Chi Thang Str, Hai Phong city – Viet Nam


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tel: +84 388 441 654