Crankshaft Rear Oil Seal Replacement - Ford COUGAR 1968 Shop Manual

GROUP 8
-
Engine
pu&!OD UPPER METERING
VALVE
FIG.
45-Type
II Hydraulic Valve
lifter Assembly
work surface (table or bench) in an
upside down 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 mo-
tion will help this.
Use every precau-
tion not t o distort i t i n anyway, or to
bend the preformed fingers.
With a
slight turning motion slide the plunger
spring over the metering valve and
down until it seats.
2. Leaving the assembly in this
upside down 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 t o 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 (Part 8-1) to fill the
lifters with test fluid.
CRANKSHAFT REAR OIL
SEAL REPLACEMENT
Replacement of a crankshaft rear
oil seal because of oil leakage re-
quires replacement of both the upper
and lower seals. Remove the engine;
then remove the crankshaft and re-
place the seals by following the pro-
cedure under Crankshaft Removal
and Installation (Section 4).
M A I N A N D C O N N E C T I N G
R O D BEARING REPLACEMENT
'
The main and connecting rod
bearing inserts are selective fit.
D o
not file or lap bearing caps or use
bearing shims to obtain the proper
bearing clearance.
Selective fit bearings are available
for service in standard sizes and 0.001
and 0.002 inch undersize
.
Standard
bearings a r e divided into two sizes and
are .identified by a daub of red or blue
paint. Refer to the Parts Catalog for
the available sizes.
Red marked bear-
ings increase the clearance; blue
marked bearings decrease the clear-
ance.
Undersize bearings, which are
not selective fit, are available for use
on journals that have been refinished.
MAIN BEARING
1.
Drain the crankcase. Remove
the oil level dipstick. Remove the oil
pan and related parts.
2. Remove the oil pump inlet tube
assembly and the oil pump.
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 remov-
al tool (tool 6331) 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. Clean the crankshaft journals.
Inspect the journals and thrust faces
(thrust bearing) for nicks, burrs or
bearing pick-up that would cause
premature bearing wear.
When re-
placing standard bearings with new
bearings, i t is good practice to fit the
bearing to the minimum specified
clearance and to first try to obtain
the proper clearance with two blue
bearing halves.
7. To install the upper main bear-
ing, place the plain end of the bear-
ing over the shaft on the locking
tang side of the block and partially
install the bearing s o that tool 6331
can be inserted in the oil hole in the
crankshaft. With tool 6331 position-
ed in the oil hole in the crankshaft,
rotate the crankshaft in the opposite
direction of engine rotation until the
bearing seats itself. Remove the tool.
8. Replace the cap bearing.
9. Support the crankshaft so that
its weight, will not compress the
Plastigage and provide an erroneous
reading. Position a jack so that it will
bear against the counterweight ad-
joining the bearing which is being
checked.
10. Place a piece of Plastigage
on the bearing surface the full width
of the bearing cap and about 114
inch off center (Fig. 46).
PLACE Plortigoge FULL CHECK WIDTH OF
WIDTH OF JOURN
FIG.
46-Installing a n d Measuring
Plastigage-Engine Installed
11. Install the cap and torque the
bolts to specifications.
D o not turn
the crankshaft while the Plastigage
is in place.
12. Remove the cap. Using the
Plastigage scale, check the width of
the Plastigage. When checking the
width of the Plastigage, check a t the
widest point in order to get the min-
imum clearance. Check at the nar-
rowest point in order to get the max-
imum clearance. The difference be-
tween the two readings is the taper
of the journals.
13. If the clearance is less than
the specified limits, try two red bear-
ing halves or a combination of red
and blue depending upon the con-
dition.
If the clearance exceeds specified
service limits, try 0.001 or 0.002 inch
undersize bearings in combination
with red .blue or standard bearings.
The bearing clearance must be within
specified limits. If the 0.001 or 0.002
undersize main bearings are used on
more than one journal, be sure they
are all installed in the cylinder block
side of the bearing. If the standard
and 0.001 or 0.002 inch undersize
bearings d o not bring the clearance
within the desired limits, refinish the
crankshaft journal, then install under-
size bearings (Refer to Part 8-1, Sec-
tion 2). For complete application and
availability of bearings, refer to the
Master Parts and Accessories Cata-
log.
D o not
file or lap bearing caps
or use shims in an effort to decrease
bearing clearances.
14. After the bearing has been
fitted, apply a light coat of engine
oil to the journal and bearings; then
install the bearing cap. Torque the
cap bolts to specifications.
15. Repeat the procedure for the