Cylinder head assemblies: valves - rocker arms
Check that the cylinder barrel mating surfaces of the cylinder head are free of carbon deposits and scale. If this is not the
case, spread diamond dressing compound (6 to 12 micron thickness) on a reference surface and slide the cylinder head
on the surface as shown in the figure until a flat finish is obtained.
Valve seats
Visually inspect the valve seats: for cracking or pitting.
Minor damage can be repaired by grinding with special 45° and 60° single-blade grinders. Grind the valves and check the
seal.