TM 10-4320-344-24
e .
Inspect cylinder head (6) for loose valve stem guides (16).
f .
Inspect inside diameter of valve stem guides for the following dimensions:
Minimum bore diameter of 0.3735 (9.4869 mm) and maximum bore diameter of
0.3750 (9.5250 mm).
g.
Inspect valve springs (9 and 14) for dimensions listed in Table 4-1.
Table 4-1.
Valve Spring Data.
Dimension
Minimum
Maximum
Free Length
1.702 in. (43.231 mm)
1.722 in. (43.739 mm)
Total Coils
6
Diameter wire
0.172 in. (4.369 mm)
Outside Diameter
0.286 in. (7.264 mm)
1.302 in. (33.020 mm)
Test Load at 1.4920
45 lbs (20 Kg)
51 lbs (23 Kg)
inches (37.8968 mm)
Test Load at 1.0820
130 lbs (59 Kg)
144 lbs (65 Kg)
inches (27.4828 mm)
h.
Inspect intake valve (11) for pits, bent valve stem, and dimensions listed in
Table 4-2.
Table 4-2.
Intake Valve Dimensions.
i .
Dimension
Minimum
Maximum
Head Diameter
1.6825 in. (42.7355 mm)
1.6925 in.
(42.9895 mm)
Stem Diameter
0.3700 in. (9.38900 mm)
0.3732 in. (9.4793 mm)
Stem to Valve Guide
0.0015 in. (0.0381 mm)
0.0025 in. (0.0635 mm)
Clearance
Seat Diameter in Head
1.6470 in. (41.8338 mm)
1.6530 in. (41.9862 mm)
Seat Width in Head
0.2344 in. (0.3594 mm)
Top of Valve Recessed
0.020 in. (0.508 mm)
0.030 in. (0.762 mm)
Below Cylinder Head
Deck
Valve Seat Angle
30°
Inspect exhaust valve (15) for pits, bent valve stem, and dimensions listed in
Table 4-3.
Table 4-3.
Exhaust Valve Dimensions.
Dimension
Minimum
Maximum
Head Diameter
1.4950 in. (37.9730 mm)
1.5050 in. (38.2270 nun)
Stem Diameter
0.3700 in. (9.3890 mm)
0.3732 in. (9.4793 mm)
Stem to Valve Guide
0.0015 in. (0.0381 mm)
0.0035 in. (0.0189 mm)
Clearance
Seat Diameter in Head
1.618 in. (41.097 mm)
1.630 in. (41.402 mm)
Seat Width in Head
0.2344 in. (0.3594 mm)
Top of Valve Recessed
0.035 in. (0.889 mm)
0.045 in. (1.143 mm)
Below Cylinder Head
Deck
Valve Seat Angle
45°
4-5
