Chrysler RAM TRUCK 2500 1994 Service Manual page 880

• 5 J L (DIESEL) ENGINE 9 - 159
Fig. 19 Flywheel/Ring Gear Position
INSTALLATION
CAUTION: Never u s e the timing pin to hold the
crankshaft in position.
(1) Use the engine barring tool to hold the crank­
shaft when the flywheel bolts are being tightened.
(2) Tighten the bolts i n a criss-cross pattern to 137
N-m (101 ft. lbs.) torque.
MAIN BEARING CLEARANCE
Inspect the main bearing bores for damage or ab­
normal wear.
Install the crankshaft main bearings and measure
main bearing bore diameter with the main bolts
tightened to 176 N-m (130 ft. lbs.) torque (Fig. 20).
MAX. 83.106 mm (3.2719 inch)
J9109-92
Fig. 20 Crankshaft Main Bearing Bore Diameter
Measure the diameter of the main journal at the
locations shown (Fig. 21). Calculate the average di­
ameter for each side of the journal.
Calculate the main bearing journal to bearing
clearance, the clearance specifications are 0.119 mm
(0.00475 inch). I f the crankshaft journal is within
MIN.
82.962 mm (3.2662
inch)
MAX.
83.103 mm (3.2682
inch)
J9109-93
Fig. 21 Crankshaft Main Journal Diameter
limits, replace the main bearings. I f not within spec­
ifications, grind the crankshaft to next size and use
oversize bearings.
CRANKSHAFT GEAR - REPLACEMENT
Remove the crankshaft gear using a heavy duty
puller.
Remove all burrs and make sure the gear surface
on the end of the crankshaft is smooth.
I f removed, install a new alignment pin. Drive the
pin i n using a ball-peen hammer, leaving i t protrud­
ing 1.60 mm (0.063 inch) to 2.39 mm (0.094 inch)
above the crankshaft (Fig. 22).
Fig. 22 Installing Alignment Pin
Heat the crankshaft gear for 45 minutes at a tem­
perature of 121°C (250°F).
CAUTION: DO NOT heat the gear longer than 4 5
minutes.
WARNING: W E A R P R O T E C T I V E GLOVES T O P R E ­
VENT INJURY.