TM-9-2815-202-34 Technical Manual for 8V71T Engines for M109 Howitzer Download
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TM9-2815-202-34 4-38. CYLINDER HEAD REPAIR (Cont) (b) Position nozzles (68) in end bore or nozzles (69) in inner bore as shown. (c) Press nozzles (68 or 69) 0.003 inch above to 0.010 inch below surface of cylinder head. (3) Exhaust valve guides Inspect valve guides for fractures, chipping, scoring, or excessive wear. Measure inside diameter of valve guide and diameter of valve stem to determine clearance between guide and valve stem. If clearance exceeds 0.005 inch, replace valve guide. Replace valve guide as follows: (a) (b) (c) (d) Support cylinder head, bottom side up, on three inch thick wood blocks. Drive valve guide (70) out of cylinder head with valve guide remover (71 ). Place cylinder head right side up in arbor press. Position valve guide squarely in bore. Using valve guide installer tool (72), press guide into position until tool contacts cylinder head. 4-192 Change 1