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 TM 10-3930-638-24&P
3-5. ENGINE MAINTENANCE (cont)
g. Cylinder Head (cont).
ITEM
LOCATION
ACTION
STEP
REMARKS
REMOVAL
1
Cylinder head
a. Two stud nuts (1)
Loosen and
Remove nut (1) and stud (6) as an
(4) top
remove
assembly
b. 17 bolts (2)
Loosen and
remove
c. 19 washers (3)
Remove
From cylinder head (4)
d. Cylinder head (4)
Remove
Lift from engine block
e. Gasket (5)
Remove and
Clean all gasket residue from cylinder
discard
head and engine block
f. Two studs (6)
Remove from
Remove only if required for replacement
nut (1)
lNSPECTION/REPAIR
Nuts (1), bolts (2),
2
Inspect
Replace if worn, or if threads damaged
washers (3) and studs (6)
Inspect
3
Replace if cracked, damaged, scored, and
clean carbon deposits (notify general
support maintenance)
4
Cylinder block sleeves
Inspect
Check taper and out-of-roundness with
bore gage. Replace sleeves if taper is
more than 0.002 inch or if out-of-
roundness is more than 0.001 inch (notify
general support maintenance)
Cylinder block top surface Inspect and
Measure top surface using straight edge
5
measure
and feeler gage. Replace block if top
surface varies more than 0.002 inch, or
if block is cracked, damaged or eroded
(notify general support maintenance)
6
Inspect
Replace if expansion plugs eroded, head
Cylinder head (4)
cracked, or valves burned or damaged
7
Lay straight edge diagonally from corner
Cylinder head bottom
Check warpage
surface
to corner and try to get a 0.006 inch feeler
gage under straight edge. Check at several
points. Reposition straight edge at
opposite corners and repeat checks.
Resurface cylinder head if warpage
exceeds 0.006 inch (notify general
support maintenance)
3-54
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