Dodge RAM TRUCK 1500 1995 Service Manual page 887

(6) Tap the piston down in cylinder bore, using a
hammer handle. At the same time, guide connecting
rod into position on crankshaft journal.
(7) The notch or groove on top of piston must be
pointing toward front of engine. The larger chamfer
of the connecting rod bore must be installed toward
crankshaft journal fillet.
(8) Install rod caps. Be sure connecting rod, con­
necting rod cap and cylinder bore number are the
same. Install nuts on cleaned and oiled rod bolts and
tighten nuts to 81 N-m (45 ft. lbs.) torque.
(9) Install the oil pan.
(10) Install the cylinder head.
(11) Install the engine into the vehicle.
CRANKSHAFT
A crankshaft which has undersize journals will be
stamped with 1/4 Inch letters near the notch of the
No.6 crankshaft counterweight (Fig. 1).
FOB EXAMPLE: E2 stamped on the No.6 crank­
shaft counterweight indicates that the No.2 rod jour­
nal is 0.025 mm (0.001 in) undersize. M4 Indicates
that the No.4 main journal is 0.025 mm (0.001 In)
undersize. R3 M2 Indicates that the No.3 rod journal
and the .No.2 main journal are 0.025 mm (0.001 in)
undersize.
Undersize
Journal Identification
Stamp
ROD - 0.025mm (0.001 in.)
Rl-R2-R3-Etc.
MAIN - 0.025mm (0.001 in.)
M1-M2-M3 or M4
STEEL STAMP IDENTIFICATION
R (ROD) AND/OR M (MAIN) FOLLOWED
BY THE ROD OR MAIN NUMBER
Fig. 1 Location of Crankshaft Identification
When a crankshaft is replaced, all main and con­
necting rod bearings should be replaced with new
bearings. Therefore, selective fitting of the bearings
is not required when a crankshaft and bearings are
replaced.
REMOVAL
(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.
— — — — — 3 J L ENGINE I - 43
(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 OP JOUMMALS
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.2 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 same
direction a s the engine rotates.
Clean Loctite 518 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.
(1) Lightly oil the new upper seal lips with engine
oil.
(2) Install the new upper rear bearing oil seal with
the white paint facing towards the rear of the engine.
(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 white paint facing towards
the rear of the engine.
(6) Apply 5 mm (0.20 in) drop of Loctite 518, or
equivalent, on each side of the rear main bearing cap
(Fig. 2). 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
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