Chrysler RAM TRUCK 2500 1994 Service Manual page 783

REMOWAL
(1) Remove the oil pan.
(2) Remove the oil pump from the rear main bear­
ing cap.
(3) Remove the vibration damper.
(4) Remove the timing chain cover.
(5) Identify bearing caps before removal. Remove
bearing caps and bearings one at a time.
(6) Lift the crankshaft out of the block.
(7) Remove and discard the crankshaft rear oil
seals.
(8) Remove and discard the front crankshaft oil
seal.
INSPECTION OF JOURNALS
The crankshaft connecting rod and main journals
should be checked for excessive wear, taper and scor­
ing. The maximum taper or out-of-round on any
crankshaft journal is 0.025 mm (0.001 inch).
Journal grinding should not exceed 0.305 mm
(0.012 inch) under the standard journal diameter. DO
NOT grind thrust faces of No.3 main bearing. DO
NOT nick crank pin or bearing fillets. After grinding,
remove rough edges from crankshaft oil holes and
clean out all oil passages.
CAUTION: After any journal grind, it is important
that the final paper or cloth polish be in the s a m e
direction a s the engine rotates.
CLEANING
Clean Loctite 515 residue and sealant from the cyl­
inder block and rear cap mating surface. Do this be­
fore applying the Loctite drop and the installation of
rear cap.
INSTALLATION
(1) Lightly oil the new upper seal lips with engine
oil.
(2) Install the new upper rear bearing oil seal with
the yellow paint facing towards the rear of the en­
gine.
(3) Position the crankshaft into the cylinder block.
(4) Lightly oil the new lower seal lips with engine
oil.
(5) Install the new lower rear bearing oil seal into
the bearing cap with the yellow paint facing towards
the rear of the engine.
(6) 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.
(7) To align the bearing cap, use cap slot, align­
ment dowel and cap bolts. DO NOT remove excess
BEARING CAP J9309-72
Fig. 7 Sealant Application to Bearing Cap
material after assembly. DO NOT strike rear cap
more than 2 times for proper engagement.
(8) 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.
(9) Install oil pump.
(10) Install the timing chain cover.
(11) Install the vibration damper.
(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.
MOPAR SILICONE SEALANT
RUBBER ADHESIVE APPLIED
Fig. 8 Apply Sealant to Bearing Cap to Block Joint
CRANKSHAFT MAIN BEARINGS
Bearing caps are not interchangeable and should
be marked at removal to ensure correct assembly.
Upper and lower bearing halves are NOT inter­
changeable. Lower main bearing halves of No.2 and 4
are interchangeable.