Cylinder head for Nissan YD25DDTi

The cylinder head, also referred to as the cylinder head assembly, mounts to the top of the engine block to seal the cylinders and form the combustion chamber. This component houses the intake and exhaust valves, valve seats, valve guides, and fuel injectors. It also contains internal passages for engine coolant and oil circulation, which are necessary for thermal management and lubrication of the valve train and upper engine assembly.

Part number 908627K is engineered specifically for the Nissan YD25DDTi engine. This component ensures precise alignment with the engine block and valve train to maintain operational parameters. The cylinder head manages the flow of intake and exhaust gases and features internal cooling channels designed to dissipate heat from the combustion process. Proper installation and sealing of this component are necessary to prevent compression leaks and fluid contamination between the oil and cooling systems.