TM 5-3895-359-14&P
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. Do not apply adhesive directly
to the seal. The adhesive will coat the
inner diameter 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 when installed. Installing the seal strip
in the groove with the colored stripe facing away
from the cylinder bores can improve its sealing
Fig. 11 Cylinder Head Seals and Gaskets
capabilities.
b. Place new seal rings in the counterbores of the
NOTE:
3M Company Super-Tack
water and oil holes in the cylinder block.
Gasket adhesive #8082 or equivalent
Silicone composition water hole seals can be
may also be used to hold the peripheral
damaged if they move out of position in the
head-to-block oil seals in place during
cylinder block counterbore during engine
engine rebuild.
rebuild. In turn, damaged seals can allow
engine coolant to contaminate lube oil and
2. To install the cylinder head on the engine without
cause serious engine damage. To prevent this,
disturbing the gaskets and seals, install guide studs J
a spray adhesive may be used to hold seals in
9665 in two corner bolt holes in the cylinder block.
place if the following precautions are taken:
1. Attach a mask or template to the cylinder
3. Insert the hooks of a chain, attached to a hoist, in the
block tire deck to minimize overspray.
vent holes of the cylinder head, or the lifter brackets,
and lift the head into position above the cylinder block.
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 "blow-by" and result 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" from the surface of
the cylinder block.
6. Apply a small amount of International Compound No.
2, or equivalent, to the threads and underside of the
head of all cylinder head attaching bolts. Then install
bolts at the corners of the head and thread them finger
tight into the cylinder block. Continue to tighten these
Fig. 12. Compression Gasket Mounting in Cylinder
bolts (finger tight) as the head is lowered into position on
Block
the cylinder block.
2. Using a high-tack, spray tube adhesive
suitable for synthetic rubber seals (3M
NOTE:
Cylinder head bolts are
Company Super-Tack Gasket Adhesive
especially designed for this purpose and
#8082, or equivalent), spray a light,
must not be replaced by ordinary bolts.
uniform coating of adhesive into the seal
counterbores. Keep the adhesive off of
10-2-26
