Ford COUGAR 1968 Shop Manual page 395

PART 8-4
-
390
And 427 V-8
lic valve lifter assembly are matched
sets. Do not inter-mix the parts.
Keep the assemblies intact until they
are to be cleaned.
3. Install the new (or cleaned)
hydraulic valve lifters through the
push rod openings with the lifter re-
moval tool (Fig. 48). Install the push
rods in their original,positions.
4. Refer to Valve Rocker Arm
Shaft Assembly Installation and in-
stall the valve rocker arm shaft assem-
blies and rocker arm covers by follow-
ing steps I thru 8.
HYDRAULIC VALVE LIFTER
DISASSEMBLY
Each valve lifter is a matched as-
sembly. If the parts of one lifter are
intermixed with those of another, im-
proper valve operation may result.
Disassemble and assemble each lifter
separately. Keep the lifter assemblies
in proper sequence so that they can
be installed in their original bores.
1. Grasp the lock ring with the
needle nose pliers to release it from
the groove. It may be necessary to
depress the plunger to fully release
the lock ring.
2. Remove the push rod cup. Re-
move the plunger (Fig. 49) and plunger
spring.
3. Invert the plunger assembly
and remove the disc valve retainer
by carefully prying up on it with
a screw driver. Remove the disc valve
and spring.
HYDRAULIC VALVE LIFTER
ASSEMBLY
A typical hydraulic valve lifter as-
sembly is shown in Fig. 50.
1. Clean the valve lifter parts,
following the procedures in Part 8-1.
FIG.
49-Lifter Plunger Removal
SPRING
VALVE DISC RETAINER
/
LIFTER ASS~MBLY-6500 A1835-0
FIG.
50-Typical Hydraulic Valve
Lifter Assembly
Place the plunger upside down on a
clean work bench.
2. Place the disc valve in position
over the oil hole on the bottom of
the plunger. Set the disc valve spring
on top of the disc.
3. Position the disc valve retainer
over the disc 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. Place the push rod cup in the
plunger:
6. Push the plunger and push rod
cup into the body and install the
lock ring (Fig. 51). Release the plun-
ger; then depress it again to fully
seat the lock ring.
7. Use the hydraulic valve lift-
er leakdown tester (Part 8-1) to fill
the lifters with test fluid. Refer to
Part 8-1, Section I for the test pro-
cedure.
CRANKSHAFT REAR OIL SEAL
REPLACEMENT-SPLIT, LIP-TYPE
Replacement of a crankshaft rear
oil seal t o correct for oil leaks re-
quires replacement of both the upper
and lower seals, as follows:
1. Remove the oil par1 and oil
pump (as required) following the pro-
cedures in this section.
2. Loosen all the main bearing
cap bolts, thereby lowering the crank-
shaft slightly but not to exceed 1/32
inch.
3. Remove the rear main bearing
cap, and remove the oil seal from
the bearing cap and cylinder block.
On the block half of the 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. Exercise caution t o prevent
scratching or 'damaging the crank-
shaft seal surfaces.
4. Carefully clean the seal grooves
in the cap and block with a brush
and solvent.
5. Dip the split, lip-type seal halves
in clean engine oil.
6. Carefully install the upper seal
(cylinder block) into its groove with
undercut side of seal toward the
F R O N T of the engine (Fig. 52). by
rotating it on the seal journal of the
crankshaft until approximately 0.375
inch protrudes below the parting
surface.
Be sure no rubber has been shaved
from the outside diameter of the seal
by the bottom edge of the groove.
7. Tighten the remaining bearing
cap bolts and torque to specifications.
8. Install the lower seal in the
rear main bearing cap with undercut
side of seal toward the FRONT of
the engine (Fig. 52). allow the seal
to protrude approximately 0.375 inch
above the parting surface to mate
with the upper seal when the cap is
installed.
9. Apply a thin coating of oil-
resistant sealer to the rear main bear-
ing cap at the rear of the top mating
surface (Fig: 52). Do not apply sealer
to the area forward of the side seal
groove. Install the rear main bearing
cap. Torque the cap bolts to specifica-
tions.
10. Dip the rear, bearing cap side
seals in light engine oil; them immed-
iately install them in the grooves. Do
not use sealer on the side seals. The
seals a r e designed t o expand when
dipped in oil. Using sealer may re-
tard this expansion. It may be nec-
essary to tap the seals into place for
the last 112 inch of travel. Do not cut
the seal projecting ends.
11. Check the rear bearing cap
side seals for leaks by squirting a few
drops of oil into the parting lines be-
Tool
FIG.
5
1 -Valve
Lifter Lock Ring
Installation