TM 5-3805-248-23-2
HEAD ASSEMBLY OVERHAUL - CONTINUED
0343 00
INSPECTION - CONTINUED
3.
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.
NOTE
Discard and replace cylinder head if erosion is severe. If erosion is slight, refer to step 2 for grinding instruc-
tions.
4.
Visually inspect combustion surface for damage and erosion across fire ring and seat area and between injector nozzle
hole and valve seat area.
5.
Use valve guide gage group to plug gage or equivalent, and measure inside diameter of both ends of each of the twelve
valve guides.
BRIDGE
VALVE GUIDE
DOWEL
TOP DECK
INTAKE
PORT FACE
CORE PLUG
PORT FACE
CORE PLUG
394-1126
CORE
VALVE SEAT
PLUG
INSERT
0343 00-3
