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TM 10-4320-343-14
SECTION II. GENERAL SUPPORT MAINTENANCE PROCEDURES
6.4 TORQUING INSTRUCTIONS.
Torquing instructions are located in Appendix G.
6.5 WEAR LIMITS.
Refer to Table 6-1 for wear limits,
fits, and tolerances for use throughout
maintenance procedures.
Table 6-1.
Wear Limits, Fits and Tolerances.
Component
Intake Valves:
Head Diameter
Stem Diameter
Stem-to-guide normal clearance
Stem-to-guide maximum clearance
Seat bore diameter in head-nominal
Seat outside diameter
Valve seat width
Seat angle
Valve rim thickness
Valve recessed below
cylinder head deck
Exhaust Valves:
Head diameter
Stem diameter
Stem-to-guide normal clearance
Stem-to-guide maximum clearance
Seat bore diameter in head-nominal
Seat outside diameter
Valve seat width
Seat angle
Valve rim thickness nominal
Valve recessed below
cylinder head deck
Minimum
1.6890 in. (42.90 mm)
0.3128 in. (7.945 mm)
0.0016 in. (0.04 mm)
1.7913 in. (45.50 mm)
1.7969 in. (45.64 mm)
0.0591 in. (1.50 mm)
45
0.0197 in. (0.50 mm)
0.1999 in. (5.078 mm)
1.4527 in. (36.90 mm)
0.3118 in. (7.920 mm)
0.0023 in.
1.5748 in.
1.5803 in.
0.0591 in.
(0.06 mm)
(40.0 mm)
40.14 mm)
(1.50 mm)
45
0.0197 in. (0.50 mm)
0.1999 in. (5.078 mm)
Maximum
1.6969 in. (43.10 mm)
0.3134 in. (7.960 mm)
0.0028 in. (0.07 mm)
0.0118 in. (0.30 mm)
1.7923 in. (45.525 mm
1.7976 in. (45.66 mm)
0.0787 in. (2.0 mm)
0.0394 in. (1.00 mm)
0.2205 in. (5.681 mm:
1.4606 in. (37.10 mm)
0.3125 in. (7.940 mm)
0.0037 in. (0.095 mm)
0.0197 in. (0.50 mm)
1.5757 in. (40.025 mm
1.5811 in. (40.16 mm)
0.0787 in. (2.0 mm)
0.0591 in. (1.50 mm)
0.2205 in. (5.681 mm)
6-3
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