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305-350 ENGINE
6A6-13
CRANKCASE FRONT COVER
Removal
1. Remove torsional damper as previously outlined.
2. Remove water pump as outlined in Section 6B.
3. Remove crankcase front cover attaching screws and
remove front cover and gasket, then discard gasket.
Installation
1. Clean gasket surface on block and crankcase front
cover.
2. Use a sharp knife or other suitable cutting tool to
remove any excess oil pan gasket material that may be
protruding at the oil pan to engine block junction.
3. Apply a 1/8 inch bead of silicone rubber sealer, part
#I051435 (or equivalent), to the joint formed at the oil pan
and cylinder block.
4. Coat the cover gasket with gasket sealer and place in
position on cover.
5. Install cover-to-oil pan seal, lightly coat bottom of seal
with engine oil and position cover over crankshaft end.
6. Loosely install the cover-to-block upper attaching
screws.
7. Tighten screws alternately and evenly while pressing
downward on cover so that dowels in block are aligned with
corresponding holes in cover.
NOTE: Position cover so that dowels enter holes in
cover without binding. Do not force cover over dowels
so that cover flange or holes are distorted.
8. Install remaining cover screws and torque to
specifications.
9. Install torsional damper and water pump as previoulsy
outlined.
OIL SEAL (FRONT COVER)
REPLACEMENT W l T H COVER
REMOVED
1. With cover removed, pry oil seal out of cover from
the front with a large screwdriver.
2. Install new seal so that open end of the seal is toward
the inside of cover and drive it into position with Tool J 23053
(Fig. 6A6-27).
C AUTI 0 N: Support cover at seal area. (Tool J
971 may be used as support).
REPLACEMENT W l T H COVER
INSTALLED
1. With torsional damper removed, pry seal out of cover
from the front with a large screwdriver, being careful not to
damage the surface on the crankshaft.
2. Install new seal so that open end of seal is toward the
inside of cover and drive it into position with Tool J 23042
(Fig 6A6-28).
Fig.
6A6-27
lnstalling Oil Seal (Cover Removed)
Fig.
6 ~ 6 - 2 8
lnstalling Oil Seal (Cover Installed)
CAMSHAFT
MEASURING LOBE LIFT
NOTE: Procedure is similar to that used for checking
valve timing. If improper valve operation is indicated,
measure the lift of each push rod in consecutive order
and record the readings.
1. Remove the valve mechanism as previously outlined.
2. Position indicator with ball socket adapter (Tool J
8520) on push rod (Fig. 6A6-29).
NOTE: Make sure push rod is in the lifter socket.
3. Rotate the crankshaft slowly in the direction of
rotation until the lifter is on the heel of the cam lobe. At this
point, the push rod will be in its lowest position.
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