Chrysler RAM TRUCK 2500 1994 Service Manual page 811

9 - 90 § J L ENGINE
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Fig. 9 Main Bearing Identification
Fig. 10 Upper Main Bearing Removal and
Installation with Tool C-3059
(5) Slowly rotate crankshaft clockwise, forcing out
upper half of bearing shell.
INSTALLATION
Only one main bearing should be selectively fitted
while all other main bearing caps are properly tight­
ened. A l l bearing capbolts removed during service
procedures are to be cleaned and oiled before instal­
lation.
When installing a new upper bearing shell, slightly
chamfer the sharp edges from the plain side.
(1) Start bearing i n place, and insert Crankshaft
Main Bearing Remover/Installer Tool C-3059 into oil
hole of crankshaft (Fig. 10).
(2) Slowly rotate crankshaft counterclockwise slid­
ing the bearing into position. Remove Tool C-3059.
(3) Install the bearing cap. Clean and oil the bolts.
Tighten the capbolts to 115 N-m (85 ft. lbs.) torque.
(4) Install the oil pump.
(5) Install the oil pan.
CRANKSHAFT REAR OIL SEALS
The service seal is a 2 piece, viton seal. The upper
seal half can be installed with crankshaft removed
from engine or with crankshaft installed. When a
new upper seal is installed, install a new lower seal.
The lower seal half can only be installed with the
rear main bearing cap removed.
U P P E R SEAL REPLACEMENT (CRANKSHAFT
REMOWED).
(1) Remove the crankshaft. Discard the old upper
seal.
(2) Clean the cylinder block rear cap mating sur­
face. Make sure the seal groove is free of debris.
(3) Lightly oil the new upper seal lips with engine
oil.
(4) Install the new upper rear bearing oil seal with
the yellow paint facing towards the rear of the en­
gine.
(5) Position the crankshaft into the cylinder block.
(6) Lightly oil the new lower seal lips with engine
oil.
(7) Install the new lower rear bearing oil seal into
the bearing cap with the yellow paint facing towards
the rear of the engine.
(8) Apply 5 mm (0.20 in) drop of Loctite 515, or
equivalent, on each side of the rear main bearing cap
(Fig. 7). DO NOT over apply sealant or allow the
sealant to contact the rubber seal. Assemble bearing
cap to cylinder block immediately after sealant appli­
cation.
(9) To align the bearing cap, use cap slot, align­
ment dowel and cap bolts. DO NOT remove excess
material after assembly. DO NOT strike rear cap
more than 2 times for proper engagement.
(10) Clean and oil all cap bolts. Install all main
bearing caps. Install all cap bolts and alternately
tighten to 115 N-m (85 ft. lbs.) torque.
(11) Install oil pump.
(12) Apply Mopar Silicone Rubber Adhesive Seal­
ant, or equivalent, at bearing cap to block joint to
provide cap to block and oil pan sealing (Fig. 8). Ap­
ply enough sealant until a small amount is squeezed
out. Withdraw nozzle and wipe excess sealant off the
oil pan seal groove.
(13) Install new front crankshaft oil seal.
(14) Immediately install the oil pan.
U P P E R SEAL REPLACEMENT (CRANKSHAFT
INSTALLED)
(1) Remove the oil pan.
(2) Remove the oil pump from the rear main bear­
ing cap.
(3) Remove the rear main bearing cap. Remove
and discard the old lower oil seal.
(4) Carefully remove and discard the old upper oil
seal.