The main engine is the primary power source for tankers like the MT PIS Patriot. It operates continuously under various operating conditions, making regular maintenance crucial to ensure safe navigation and efficient fuel consumption. One major maintenance procedure is a Main Engine General Overhaul (GO), which involves dismantling and thoroughly inspecting all major engine components.

A general overhaul is major maintenance performed after the engine reaches a certain number of running hours or when performance begins to decline. During this stage, engine components are disassembled, inspected, repaired, replaced if necessary, and then reassembled according to manufacturer standards.
On the MT PIS Patriot ship, GO is carried out to ensure that the engine continues to operate at optimum performance, meets classification standards, and is safe during sailing operations.

Some of the main reasons for doing GO on the main engine:
- Decreased compression pressure
- Increased fuel consumption
- Abnormal noise and vibration
- Increased exhaust temperature
- Decreased lubricating oil pressure
- Carbon deposits in the combustion chamber
- Running hours have reached the GO interval
Timely maintenance can prevent fatal damage that could cause ship downtime.



The MT PIS Patriot’s main engine general overhaul is a critical process to ensure the reliability of the main engine during operation. With proper procedures and adherence to manufacturer standards, the vessel can operate more efficiently, safely, and trouble-free. Optimal maintenance will positively impact engine performance and the vessel’s overall operational effectiveness.


