TM 5-3895-346-14
CYLINDER HEAD
ENGINE OVERHAUL
(1)
Attach a mask or template to the cylinder block fire deck to minimize overspray.
(2) Using a high-tack, spray-type adhesive suitable for synthetic rubber seals (3M Company
Super-Tack Gasket Adhesive #8082, or equivalent), spray a light, uniform coating of adhesive into the seal
counterbores. Keep the adhesive off of adjacent block surfaces and wipe off any that gets on the fire deck or
liner bores.
(3) Allow the adhesive to dry to a high-tack consistency (stickiness) before installing the seal.
This permits the evaporation of the liquid propellant used with the adhesive.
CAUTION
Do not apply adhesive directly to the seal. The adhesive will coat the I.D. of the
seal and the spray propellant may cause the seal to swell temporarily.
c.
Install a new oil seal in the groove at the perimeter of the cylinder block. The seal must lay
flat in the groove and must not be twisted or stretched.
NOTE
3M Company Super-Tack Gasket adhesive #8082 or equivalent may also be used
to hold the peripheral head-to-block oil seals in place during engine rebuild.
NOTE
Installing the seal strip in the groove with the colored stripe facing away from the
cylinder bores can improve its sealing capabilities.
2.
To install the cylinder head on the engine without disturbing the gaskets and seals, use guide studs
J 9665. Install the studs in the end cylinder block boltholes on the camshaft side of the cylinder head (Fig. 2).
3.
Attach lifting fixture J 22062-01 to the cylinder head and lift the head into position above the
cylinder block (Fig. 2).
4.
Make a final visual check of the compression gaskets and seals to ensure that they are in place
before the cylinder head is lowered. THIS IS A VERY IMPORTANT CHECK. Gaskets and seals which are not
seated properly will cause leaks and blowby, resulting in poor engine performance and damage to the engine.
5.
Wipe the bottom of the cylinder head clean. Then lower the head until it is about 1/2-inch from the
surface of the cylinder block.
6.
Apply a small quantity of International Compound No. 2, or equivalent, to the threads and
underside of the head of each cylinder head attaching bolt. Then install the bolts finger tight. On the in-line
engines equipped with both six and twelve-point bolts, the twelve-point bolts must be installed on the camshaft
side of the head to eliminate possible interference between the governor control link and the cylinder head bolt.
Continue to tighten the bolts as the head is lowered on the cylinder block.
CAUTION
Cylinder head bolts are especially designed for this purpose and must not be
replaced by ordinary bolts.
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