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:
Support cylinder head, bottom
side up, on three inch thick wood
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.
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