HEAD ASSEMBLY OVERHAUL - CONTINUED
INSPECTION - CONTINUED
Use magnaflux (preferred) or dye penetrant method to inspect combustion surface and top deck for cracks. Discard and
replace cylinder head if cracks appear between valve seats or between valve seat and injector nozzle holes. If cracks are
in other areas and are less than 0.25 in. (0.635 mm) long and 0.125 in. (3.175 mm) deep, repair by welding.
Discard and replace cylinder head if erosion is severe. If erosion is slight, refer to step 2 for grinding instruc-
Visually inspect combustion surface for damage and erosion across fire ring and seat area and between injector nozzle
hole and valve seat area.
Use valve guide gage group to plug gage or equivalent, and measure inside diameter of both ends of each of the twelve