TM 5-3810-206-35
more, measured at top of ring travel. Sleeve flange
maximum face width of 0.076 inch. Height of valves
thickness is 0.403 to 0.405 inches. Block counterbore is
above surface of cylinder head must be between a
0.400 to 0.402 inches. Cylinder block main bearing
minimum of 0.082 inch and a maximum of 0.128 inch.
original bore is 3.8155 to 3.8165 inches. Main bearings
(c) Valve guide to stem clearance is
specified clearance is 0.0030 to 0.0059 inch. Replace
between 0.003 and 0.005 inch. Replace guides when
bearing when clearance is 0.008 inch or more.
clearance measures 0.007 inch (with a new valve).
(5) Inspect all valves for cracks, pitted dished,
(d) Valve springs should require between
warped, or excessively worn condition.
Check for
53.20 and 58.80 pounds of force to compress them to 2-
dimensions and tolerances as follows:
1 32 inches in length.
(a) Be sure 0.094 inch of material remains
(e) Lifter bore is 1.3125 to 1.3135 inch.
New lifter diameter is 1.3100 to 1.3110 inches. Replace
above face after grinding. Grind to a 291/4 face. Stem
lifters when clearance is 0.009 inch.
diameter of a new valve is 0.3715 to 0.3725 inches.
(6) Inspect pre-combustion chamber for cracks,
Replace valves that are worn or damaged beyond repair.
breaks, or other damage. Replace defective
(b) Grind valve seats to a face of 30 , with a
Figure 3-61. Positioning the pre-combustion chamber and sequence for cylinder head bolt tightening.
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