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PART 8-4-302-351 C.I.D. V8 ENGINES
8-55
assemblies intact until they are to be
cleaned.
The
disassembly
and
assembly
procedures for Types I and II valve lifters
are different. Valve lifters should always
be tested after assembly; refer to the test
procedures
covered on page 8-9.
TYPE I
Disassembly
Disassemble and assemble each lifter
separately.
Identify the lifter assemblies so
they can be installed
in
their original
bores.
1. Grasp the lock ring with needle
nose pliers to release it from the
groove.
It
may be necessary to depress the plunger to
ful.\y release lock ring.
2.
Remove
the
push
rod
cup,
metering valve (disc), plunger and
spring.
3. Remove the plunger assembly, the
check valve and the check valve retainer
and plunger
spring.
Carefully remove the
plunger
spring,
the check valve retainer
and,
the check valve disc from the plunger.
Assembly
Type I hydraulic lifter assembly is
shown in
Fig.
27.
1.
Place the plunger upside down on
a clean work
bench.
2.
Place the check valve (disc or ball
check) in position over the oil hole on the
bottom of the plunger. Set the check valve
spring on top of the check valve (disc or
ball
check).
3.
Position the check valve retainer
over the check valve and spring and push
the retainer down into place on the
plunger.
4.
Place the plunger spring, and then
the plunger (open end up) into the lifter
body.
5.
Position the metering valve (disc)
in the plunger, and then place the push
rod cup in the plunger.
6. Depress the plunger, and position
the closed end of the lock ring in the
groove of the lifter body. With the plunger
still depressed, position the open ends of
the lock ring in the groove. Release the
plunger, and then depress it again to fully
seat the lock
ring.
7.
Use the hydraulic valve lifter
leakdown tester (pageS-9 ) to fill the lifters
with test fluid
.
TYPE II
Disassembly
Each
valve
lifter
is
a rna tched
assembly.
If parts of one lifter are
intermixed
with
those
of
another,
improper valve operation may result.
PUSH ROD METERING VALVE
a:!, /
CHECK VALVE
,-
~~
-
'j
/CHECK VALVE SPRING
\
' •
.
(I )
PLUNGER SPRING
COC . . NG
•,,,~
BODY
•cuNG"
\
~
CHECK VALVE
RETAINER
A2867-A
FIG.
27- Type 1 Hydraulic Valve Lifter
Assembly
Disassemble and
assemble each lifter
separately.
Keep the lifter assemblies in
proper sequence so they can be installed in
their original bores.
1. Grasp the lock ring with needle
nose pliers to release it from the groove.
It
may be necessary to depress the plunger to
fully release lock ring.
2.
Remove
the
push
rod
cup,
metering
valve disc, and the upper
metering valve. Do not bend the metering
valve or the valve tensioning finger.
3.
Remove the plunger assembly, the
check valve and the check valve retainer
and plunger spring. Carefully remove the
plunger spring, the check valve retainer
and the check valve disc from the plunger.
Assembly
Type II hydraulic lifter assembly is
shown in Fig. 28.
1.
Place the plunger on a clean work
surface (table or bench) in an inverted
position and center the check valve disc on
it. Carefully slide the check valve over the
disc and down until it bottoms. A slight
turning motion will help this. Use every
precaution not to distort it in any way, or
to bend the preformed fingers. With a
slight turning motion slide the plunger
spring over the metering valve and
d~wn
until it seats.
2.
Leaving the assembly in the
inverted position, slide the lifter body
down over the spring until it slightly
compresses the spring.
3.
Position the combined assembly
right side up on the work surface (table or
bench).
4. Position the upper metering valve
in the plunger taking care not to tilt it to
either side, and not to damage or bend the
valve tensioning finger. Place the metering
valve disc over the metering valve and
install the push rod cup. Depress the cup
and install the lock ring.
5. Use the hydraulic valve lifter
leakdown tester to fill the lifters with
test fluid.
PUSH ROD
UPPER METERING
ul /)":::: . . ""
r·~~7'"'
·~TI':'
J.
j~~
VALVE
LOCK RING
PLUNGER
SPRING
BODY
LIFTER ASSEMBLY
6500
A 2505-.l
FIG. 28- Type II Hydraulic Valve Lifter
Assembly
CRANKSHAFT REAR OIL SEAL
REPLACEMENT
Replacement of a crankshaft rear oil
seal because of oil leakage requires
replacement of both the upper and lower
seals. Refer to Crankshaft Rear Oil Seal
Replacement on page 8-55for "replacement
procedure.
MAIN BEARINGS
The main bearing inserts are selective
fit. Refer to procedures under Fitting
Main and Connecting Rod Bearings.
REMOVAL
1. Drain the
crankcase.
Remove the
oil level dipstick. Remove the oil pan and
related parts.
2.
Remove the oil pump and inlet
tube assembly.
3.
Replace one bearing at a time,
leaving
the
other
bearings
securely
fastened. Remove the main bearing cap to
which new bearings are to be installed.
4.
Insert the upper bearing removal
tool in the oil hole in the crankshaft.
5.
Rotate the crankshaft in the
direction of the engine rotation to force
the bearing out of the block.
6.
If
the rear main bearing is being
replaced, remove and discard the rear oil
seal from the bearing cap.
Loosen all main bearing bolts, thereby
lowering the crankshaft slightly but not to
exceed 1/32 inch. Remove the block half
of the rear oil seal. Use a seal removal tool
or install a small metal screw in one end of
the seal, and pull on the screw to remove
the seal. Be careful not to burr the
crankshaft seal rubbing surface.
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