Pistons And Connecting Rods - Ford COUGAR 1968 Shop Manual

PART 8-3
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289 And
342
V-8
remaining bearings that require re-
placement.
16. If the rear main bearing is to
be replaced, remove the rear main
bearing cap. Remove and discard the
rear oil seal.
17. Clean the rear journal oil seal
groove and the mating surfaces of
the block and rear main bearing cap.
Preform the new seal by hand to the
approximate radius of the cap.
18. Insert the seal in the oil seal
groove, seating the center of the seal
first and allowing the seal to extend
equally on both ends. Press the seal
down firmly with thumb at the center
of the seal, then press both ends of
the seal into the groove, working
from the ends to the center.
19. Position the seal forming tool
as shown in (Fig. 47) and complete the
seal installation. After installation,
cut the ends of the seal flush.
20. Apply a thin coating of oil-
resistant sealer to the rear main bear-
ing cap at the rear of the top mating
surface (Fig. 47).
D o not apply sealer
to the area forward of the oil slinger
groove.
Install the rear main bearing
cap and torque the cap bolts to spec-
ifications.
FIG.
47-Seal to Rear Bearing
C a p Installation
21.
If the thrust bearing cap (No.
3 main bearing) has been removed, in-
stall 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 65). Hold the crankshaft forward
and pry the thrust bearing cap to the
rear (Fig. 65). This will align the
thrust surfaces of both halves of the
bearing. Retain the forward pressure
on the crankshaft. Torque the cap
bolts to specifications (Fig. 65).
22. Clean the oil pump inlet tube
screen. Prime the oil pump by filling
the inlet opening with oil and rotate
the pump shaft until oil'emerges from
the outlet opening. Install the oil pump
and the inlet tube assembly.
23. 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.
24. Fill the crankcase. Start the
engine and check for oil pressure.
Operate the engine at fast idle and
check for oil leaks.
CONNECTING ROD BEARING
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 bearing bore in the connecting
rod and cap are clean. Foreign ma-
terial under the inserts will distort
the bearing and cause a failure.
4.
Clean the crankshaft journal.
When replacing standard bearings
with new bearings, i t is good prac-
tice to fit the bearing to the minimum
specified clearance and to first try to
obtain the proper clearance with two
blue bearing halves.
5. Install the bearing inserts in the
connecting rod and cap with the tangs
fitting in the slots 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 specifications.
D o not turn the crankshaft while the
Plastigage is in pIace.
9. Refer to steps 12 and 13 under
Main Bearing Replacement.
10. After the bearing has been
fitted, clean and apply a light coat of
engine oil to the journal and bearings.
Install the connecting rod cap. Torque
the nuts t o specifications.
11.
Repeat the procedure for the
remaining connecting rods that re-
quire new bearings.
12. Follow steps 22 thru 24 under
Main Bearing Replacement.
PISTONS A N D
C O N N E C T I N G RODS
REMOVAL
1.
Drain the cooling system and
the crankcase. Remove the intake
manifold, cylinder heads, oil pan and
oil pump following the procedures in
this section.
2. Remove any ridge and/or de-
posits from the upper end of the cy-
linder bores as follows:
Turn the crankshaft until the pis-
ton to be removed is at the bottom
of its travel and place a cloth on the
piston head to collect the cuttings.
Remove any ridge and/or deposits
from the upper end of the cylinder
bores. Remove the cylinder ridge
with a ridge cutter. Follow the in-
structions furnished by the tool man-
ufacturer.
Never cut into the ring
travel area in excess of 1/32 inch
when removing ridges.
3. Make sure all connecting rod
caps are marked so that they can be
installed in their original positions.
4.
Turn the crankshaft until the
connecting rod being removed is
down.
5. Remove the connecting rod
nuts and cap.
6.
Push the connecting rod and
piston assembly out the top of the
cylinder with the handle end of a
hammer.
Avoid damage to the crank-
shaft journal or the cylinder wall
when removing the piston and rod.
7. Remove the bearing inserts
from the connecting rod and cap.
8. Install the cap on the connect-
ing rod from which it was removed.
INSTALLATION
1.
If new piston rings are to be
installed, remove the cylinder wall
glaze. Follow the instructions of the
tool manufacturer.
2. Oil the piston rings, pistons and
cylinder walls with light engine oil.
Be sure to install the pistons in the
same cylinders from which they were
removed or to which they were
fitted. The connecting rod and +ear-
ing caps are numbered from l to 4
in the right bank and from 5 to 8
in
the left bank, beginning at the front
of the engine. The numbers on the
connecting rod and bearing cap must
be on the same side when installed
in the cylinder bore.
If
a connecting
rod is ever transposed from one
block or cylinder to another, new
bearings should be fitted and the
connecting rod should be numbered