TM 10-4610-229-24
3-62. VALVE REPLACEMENT/REPAIR (CONT)
a. Removal
1
Using spring compressor, compress spring. Remove locks.
2
Remove spring compressor, rotocoil, and spring.
3
Remove valve from bottom of cylinder head. Tag location of valve for reassembly.
4
Perform steps 1 thru 6 for each valve to be removed.
5
Inspect parts for damage. Replace as required.
6
Using spring tester, check tension of valve springs. Spring force should be 73.6-77.8 ft lb when length of
spring under test is 2.165 in. Replace all valves with incorrect tensions.
b. Repair
1
Check valve stems for bending, pitting, and wear. Replace as required. If valves are mildly pitted, they may
be refaced.
2
Using valve grinder, reface valves:
• Angle of intake valve face: 29-1/4° ±1/4°
• Angle of exhaust valve face: 44-1/4°±1/4°
3-165
