sealing and covering the cylinder block is the main function of CHC. In some type the cylinder head cover is integrated with air cleaner and air intake manifold.
engine block, piston, cylinder head, cylinder liner, camshaft, crankshaft, valves, crankcase/sump, inlet manifold, exhaust manifold, cylinder head cover
The cylinder head torque settings are a list of parts in the torque sequence. It tells where everything is and can be found.
No
The cylinder head is located on top of the engine. The spark plugs thread into the cylinder head(s).....
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the parts of the cylinder are the base and axis
Cracks can be welded and then the head can be resurfaced.
1988-1991 yz250 motors are completely interchangeable. Some parts like the cylinder head use the same casting from 1988-1996. Note: although interchangeable the cylinder ports and cylinder head combustion chamber shape differ form year to year. The optimum setup for a 1990 yz250 is a 1991 cylinder with a 1992 head.
The intake & exhaust manifold must be removed, then the head is remove. Head inspected for cracks and warpage, all gaskets replaced and all parts reinstalled.
Cylinder head 43Nm Cylinder head cover 10Nm
Start with undressing the cylinder head inlet and exhaust manifolds get a container for bolts and any other small stuff undo all of the cylinder head studs and lift off the cylinder head.