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 TM 55-1905-220-14-4
3-34. CYLINDER HEAD-MAINTENA NCE INSTRUCTIONS (Cont.).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION AND REPAIR
17. Cylinder
1. Pres-
a. Seal off water holes in
head
sure
the head with steel plates
check
and suitable rubber gaskets
cylin-
secured in place with
der
bolts and washers. Drill
head.
and tap one of the cover
plates for an air hose
connection.
b. Install scrap or dummy
injectors to ensure proper
seating of the injector
tubes. Dummy injectors
may be made from old
injector nuts and bodies
(the injector spray tips
are not necessary). Then
tighten-the injector clamp
bolts to 20-25 lb-ft (27-
34 Nm) torque.
c. Apply 80-100 psi (552-689
kpa) air pressure to the
water jacket. Then
immerse the cylinder head
in a tank of water,
previously heated to
180 200 (82 93 ),
-
F
-
C
for about twenty minutes
to thoroughly heat the
head. Observe the water
in the tank for bubbles
which indicate a leak or
crack. Check for leaks
at the top and bottom'of
the injector tubes, oil
gallery, exhaust ports,
fuel manifolds and at the
top and bottom of the
cylinder head.
3-740
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