Cylinder Head and Valves
CLEAN AND INSPECT TOP DECK OF
1. Remove gasket material, rust, carbon, and other
foreign material from top deck. Gasket surface must be
2. Use compressed air to remove all loose foreign
material from cylinders and top deck.
3. Clean all cylinder head mounting cap screw holes
using JDG681 or an equivalent 9/16-12 UNC-2A tap
about 88.9 mm (3.5 in.) long. Use compressed air to
remove debris and any fluids which may be present in
the cap screw holes.
4. Measure top deck flatness. See MEASURE CYLINDER
BLOCK in Group 10.