Nissan
Cylinder head for Nissan YD22
This cylinder head is designed for Nissan YD22 and YD25 diesel engines. It serves as the top cover for the engine block to form the combustion chambers.
Specifications
- Part number
- 908505
- Brand
- Nissan
The cylinder head 908505 acts as the top closure for the engine block, creating the combustion chambers where the air and fuel mixture is compressed and ignited. This component houses the intake and exhaust valves, along with the necessary ports for air intake and exhaust gas discharge. It also contains integrated channels for engine coolant to circulate, which helps manage the thermal loads generated during the combustion process. By maintaining a tight seal against the engine block, this part ensures the compression levels required for consistent engine operation.
This component is compatible with Nissan YD22 and YD25 diesel engines often found in industrial machinery and equipment. It provides the structural interface for fuel injectors and valve train components, ensuring that the timing and combustion cycles remain synchronized. Proper installation of this head is necessary to prevent leaks of combustion gases or coolant into the engine oil system.
In internal combustion engines, the cylinder head is the primary assembly that regulates gas flow and heat dissipation. It allows for the precise control of intake and exhaust timing, which is essential for the power output and fuel efficiency of the machine.

