The main engine parts in a ship include the cylinder block, pistons, and crankshaft, which work together to convert fuel into mechanical energy.

Other essential components are the connecting rods, camshaft, and valves, which manage air-fuel mixture intake and exhaust gases.

Additional critical parts are the fuel injectors, turbochargers, and cooling system, ensuring efficient combustion and temperature control.

Main Engine Parts in Ships:

1. Cylinder Liner: Size - 200-1000mm diameter, Material - Cast iron or steel alloy, Grade - ASTM A48 or equivalent.

2. Piston: Size - 150-800mm diameter, Material - Aluminum alloy or cast iron, Grade - SAE J403.

3. Connecting Rod: Size - 500-3000mm length, Material - Forged steel, Grade - EN8 or AISI 4340.

4. Crankshaft: Size - 1-10 meters length, Material - Forged steel, Grade - ASTM A668 or equivalent.

5. Camshaft: Size - 1-5 meters length, Material - Alloy steel, Grade - SAE 1045.

6. Bearings: Size - Varies by engine, Material - Babbitt metal or bronze, Viscosity - ISO VG 68-220.

7. Turbocharger: Size - 300-1500mm diameter, Material - Nickel-based alloys, Buoyancy - N/A.

8. Fuel Injector: Size - 50-200mm length, Material - High-carbon steel, Grade - AISI 440C.

9. Exhaust Valve: Size - 50-300mm diameter, Material - Heat-resistant steel, Grade - EN52 or equivalent.

10. Lubricating Oil: Viscosity - SAE 30-50, Grade - API CF-4 or higher.

11. Cooling System: Material - Copper-nickel alloys, Buoyancy - N/A.

12. Gaskets & Seals: Material - Graphite or rubber, Grade - ASTM F104 or equivalent.