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PART 8-2- 200, 250 C.I.D. SIX CYLINDER ENGINES
8-39
rJ
MAJOR REPAIR OPERATIONS
CLUTCH
POLOT
BEARINu
7600
MAIN BEARING CAPS
BOLT-6345A
FIG. 44-Typical 200
&
250 Six Crankshaft
To perform the operations in this
section, it will be necessary to re-
move the engine from the car and
install it on a work stand.
When installing nuts or bolts that
must be torqued (refer to
Page 8-70
for torque specifications), oil the
threads with light weight engine oil.
Do not
oU
threads that require
«~H
resistant or water-resistant sealer.
CRANKSHAFT
REMOVAL
The crankshaft and related parts
are
shown
in Fig. 44.
1.
Loosen the alternator adjust-
ing bolts and remove the fan belt.
Remove the oil level dipstick.
2. Remove the accessory drive
pulley (if so equipped). Remove
the crankshaft damper retaining bolt
and washer. Remove the crankshaft
vibration damper using tool 6306
AG.
3. Remove the cylinder front
cover.
4. Check the timing chain de-
flection, then remove the timing
chain and sprockets by following
steps 4 and
5
under Cylinder Front
Cover and Timing Chain Removal.
5. Invert the engine on the work
stand. Remove the flywheel. Remove
the oil pan and gasket. Remove the
oil pump.
6. Make sure all bearing caps
(main
and
connecting
rod)
are
marked so that they can be installed
in their original locations. Turn the
crankshaft until the connecting rod
from which the cap is being removed
is down. Remove the connecting rod
cap.
Push the connecting rod and
piston assembly up in the
cylinder.
Repeat for the remaining caps.
7. Remove the main bearing caps.
8. Carefully lift the crankshaft
out of the block so that the thrust
bearing surfaces are not damaged.
Handle the cranuhaft with care to
avoid possible fracture or
daDulp
to the fioisbed surfaces.
CLEANING AND INSPECTION
Refer to page
8-17
for the
cleaning
and
inspection procedures. Be sure
the oil seal surfaces on the
crank-
shaft and crankshaft damper
are
properly cleaned.
REPAIRS
To refinish journals, dress minor
A2230-C
imperfections,
etc.,
refer
to
Page
8-1
4
Section
2.
INSTALLATION
1. Remove the
rear journal
oil
seal from the block and rear
main
bearing cap.
l. Remove the main bearing in-
serts from the block
and
bearing
caps.
3. Remove the connecting
rod
bearing inserts from the connecting
rods and caps.
4. Clean the rear journal oil
seal
grooves.
Install a new rear
journal
oil seal in the block
(Fig.
45)
and
rear main bearing cap (Fig. 32)
.
After
installation, cut the ends of the seals
ftush.
5. Apply a thin coating of oil re-
sistant sealer to the rear main
bear-
ing cap at the rear of the top mating
surface (Fig. 32) . Do not apply seal-
er to the ana forward of the oU
Jlla&er
groove.
6. If the crankshaft main bearing
journals have been refinished to a
definite undersize, install the correct
undersize bearings. Be sure the bear-
ing inserts and bearing bores are
clean. Foreign material under the
in-
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