Ford COUGAR 1968 Shop Manual page 329

PART 8-2
-
170 And 200 Six
8-45
vide an erroneous reading. Position
a jack so that it will bear against the
counterweight adjoining 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. 37).
PLACE
Plostigoge
FULL CHECK
OF
WIDTH OF JOURNAL
ABOUT
'/4
INCH OFF
CENTER
FIG.
37-Installing
and
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 at the
widest point in order to get the mini-
mum 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 journal.
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 condi-
tion.
If the clearance exceeds specified
limits, try 0.001 or 0.002 inch under-
size bearings in combination with blue
red or standard bearings.
The bearing
clearance must be within specified
limits. I f
0.001
or
0.002
inch under-
size main bearings are used on more
than one journal, be sure they are all
installed in the block.
If the standard and 0.001 or 0.002
inch undersize bearings do not bring
the clearance within the desired limits,
refinish the crankshaft journal; then
install undersize bearings. (Refer to
Part 8-1, Section 2). For complete
application and availability of bear-
ings, refer to the Master Parts and
Accessories Catalog. D o not file or
lap bearing caps or use shims in an
effort to decrease bearing clear-
ances.
14. If the rear main bearing is re-
placed, replace the lower oil seal in
the rear main bearing cap as follows:
Remove and discard the rear seal.
If there is evidence of oil seal leak-
age, the upper half of the oil seal
must also be replaced to assure sat-
isfactory sealing.
Clean the mating surfaces of the
block and rear main bearing cap,
and the rear journal oil seal groove.
Preform the new seal by hand to
the approximate radius of the cap.
Insert the seal in the oil seal
groove, seating the center of the seal
first with the seal extending equally
on both ends. Press the seal down
firmly with the thumb at the center
of the seal, then press both ends of
the seal into the groove working
from the ends to the center.
Position the seal forming tool as
shown in Fig. 38 and complete the
seal installation. After installation,
cut the ends of the seal flush.
Apply a thin coating of oil-resist-
ant sealer to the rear main bearing
cap at the rear of the top mating
surface (Fig. 38).
D o not apply
sealer to the area forward of the
oil slinger groove.
The upper oil seal in the block
cannot be replaced with the crank-
shaft installed.
15. 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.
16. Repeat the procedure for the
remaining bearings that require re-
placement.
17. If the thrust bearing cap (No.
3 main bearing) has been removed,
install it as follows:
Install the thrust bearing cap with
the bolts finger-tight. Pry the crank-
shaft forward against the thrust sur-
face of the upper half of the bearing
(Fig. 58). Hold the crankshaft for-
ward and pry the thrust bearing cap
to the rear (Fig. 58). This will align
the thrust surfaces of both halves of
the bearing. Retain the forward pres-
sure on the crankshaft. Torque the
cap bolts to specification (Fig. 58).
18. Clean the oil pump inlet tube
screen. Prime the oil pump by filling
the inlet opening with oil and rotating
the pump shaft until oil emerges from
the outlet opening. Then install the
oil pump and the inlet tube assembly.
19. Position the oil pan gaskets on
the oil pan. Position the oil pan front
seal on the cylinder front cover.
Position the oil pan rear seal on the
rear main bearing cap. Install the oil
pan and related parts. Install the oil
level dipstick.
20. Fill the crankcase. Start the
engine and check for oil pressure.
Operate the engine at fast idle and
check for oil leaks.
FIG.
38-Seal
t o Rear Bearing C a p
Installation
C O N N E C T I N G R O D
B E A R I N G S
1. Follow steps I and 2 under
Main Bearing Replacement.
2. Turn the crankshaft until the
connecting rod to which new bear-
ings are to be fitted is down. Remove
the connecting rod cap. Remove the
bearing inserts from the rod and
cap.
3. Be sure the bearing inserts and
the beqring bore in the connecting
rod and cap are clean. Foreign mater-
ial under the inserts will distort the
bearing and cause a failure.
4. Clean the crankshaft journal.
5. Install the bearing inserts in
the connecting rod and cap with the
tangs fitting in the slot provided.
6. Pull the connecting rod assem-
bly down firmly on the crankshaft
journal.
7. Place a piece of Plastigage on
the lower bearing surface, the full
width of the cap and about 114
inch off center.
8. Install the cap and torque the
connecting rod nuts to specification.
D o not turn the crankshaft while
the Plastigage is in place.
9. Remove the cap; then, using
the Plastigage scale, check the
width of the Plastigage. When
checking the width of the Plastigage,
check at the widest point in order
to get the minimum clearance.