Dodge RAM TRUCK 1500 1995 Service Manual page 875

Fig. 3 Removal of Front Crankshaft OH Seal
N-m (30 ft, lbs.) torque with cylinder head installed
or 20 N-m (15 ft. lbs.) torque with cylinder head re­
moved. - With a torque applied to the camshaft
sprocket bolt, crankshaft should not be permitted to
move. It may be necessary to block the crankshaft to
prevent rotation.
(8) Hold a scale with dimensional reading even
with the edge of a chain link. With cylinder heads in­
stalled, apply 14 N-m (30 ft. lbs.) torque in the re­
verse direction. With the cylinder heads removed,
apply 20 N-m (15 ft. lbs.) torque in the reverse direc­
tion. Note the amount of chain movement (Fig. 4).
J9409-96
TORQUE
W R E N C H
Fig. 4 Measuring Timing Chain Wear and SireMi
(4) Install a new timing chain, if its movement ex­
ceeds 3.175 mm (1/8 inch).
(5) If chain is not satisfactory, remove camshaft
sprocket attaching bolt and remove timing chain with
crankshaft and camshaft sprockets.
(6) Place both camshaft sprocket and crankshaft
sprocket on the bench with timing marks on exact
imaginary center line through both camshaft and
crankshaft bores.
(7) Place timing chain around both sprockets.
(8) Turn crankshaft and camshaft to line up with
keyway location in crankshaft sprocket and in cam­
shaft sprocket.
(9) Lift sprockets and chain (keep sprockets tight
against the chain in position as described).
(10) Slide both sprockets evenly over their respec­
tive shafts and use a straightedge to check alignment
of timing marks (Fig. 5).
Fig. 5 Alignment of Timing Marks
(11) Install the camshaft bolt. Tighten the bolt to
68 N-m (50 ft. lbs.) torque.
(12) Check camshaft end play. The end play should
be 0.051-0.152 mm (0.002-0.006 inch) with a new
thrust plate and up to 0.254 mm (0.010 inch) with a
used thrust plate. If not within these limits install a
new thrust plate.
C L E A N I N G
Be sure mating surfaces of chain case cover and
cylinder block are clean and free from burrs.
The water pump mounting surface must be
cleaned.
INSTALLATION
(1) Using a new cover gasket, carefully install
chain case cover to avoid damaging oil pan gasket.
Use a small amount of Mopar® Silicone Rubber Ad­
hesive Sealant, or equivalent, at the joint between
timing chain cover gasket and the oil pan gasket.
Finger tighten the timing chain cover bolts at this
time.
(2) Place the smaller diameter of the oil seal over
Front Oil Seal Installation Tool 6635 (Fig. 6). Seat
the oil seal in the groove of the tool.
CRANKSHAFT.
B'OiTOIL N
SEAL
INSTALL THIS
END INTO
SPECIAL TOOL
6635
J9309-44
Fig, 3 Placing Oil Seal on Installation Tool 6635
(3) Position the seal and tool onto the crankshaft
(Fig. 7).