4
7
8
5
6
4
5
TM 9-4940-568-34
5-42
5-7. CYLINDER HEAD REPLACEMENT (CONT).
NOTE
There are two different lengths of
screws.
Tag and mark all screws.
Note location of screws prior to
removal.
Tightening sequence is shown
with numbers in boxes.
(2)
Remove 10 cylinder head screws (5) and
four cylinder head screws (6) from cylinder
head (4) in the sequence shown.
Cylinder head weighs 80 lbs (36
kg). Attach suitable lifting
device for removal and properly
support cylinder head to prevent
injury to personnel.
(3)
With the aid of an assistant, remove cylinder
head (4) and gasket (7) from engine (8).
b.
Cleaning/Inspection.
(1)
Inspect the coolant passages. A large build up of rust and lime will require removal of the cylinder block
for cleaning in a hot tank.
(2)
Use a straight edge and feeler gage to measure the overall flatness of the cylinder block. The overall
flatness, end to end and side to side, must not exceed 0.075 mm (0.003 in.).
(3)
Visually inspect the combustion deck for any localized dips or imperfections. If present, the cylinder
head must be replaced.
