The cylinder head is a box-shaped part with complex structure. Designed with inlet and exhaust valve seat holes, valve guide holes, spark plug mounting holes (gasoline engine) or injector mounting holes (diesel). A water jacket, an intake and exhaust passage, and a portion of the combustion chamber or combustion chamber are also cast in the cylinder head. If the camshaft is mounted on the cylinder head, the cylinder head is also machined with a cam bearing bore or a cam chock and its lube passage.
