Dodge Dakota Sport 2001 Service Manual page 1069

9 - 40 ENGINE 2.5L
CRANKSHAFT MAIN BEARINGS (Continued)
Fig. 44 Location of Mopar Gasket Maker
1 - MOPAR GASKET MAKER (OR EQUIVALENT)
2 - 19 mm (.75 IN)
3 - 6 mm (0.025 IN)
(a) Attach a magnetic base dial indicator to the
cylinder block at either the front or rear of the
engine.
(b) Position the dial indicator rod so that it is
parallel to the center line of the crankshaft.
(c) Pry the crankshaft forward, position the dial
indicator to zero.
(d) Pry the crankshaft forward and backward.
Note the dial indicator readings. End play is the
difference between the high and low measurements
(Fig. 45). Correct end play is 0.038-0.165 mm
(0.0015-0.0065 inch). The desired specifications are
0.051-0.064 mm (0.002-0.0025 inch).
(e) If end play is not within specification, inspect
crankshaft thrust faces for wear. If no wear is
apparent, replace the thrust bearing and measure
end play. If end play is still not within specifica-
tion, replace the crankshaft.
(12) If the crankshaft was removed, install the
crankshaft into the cylinder block.
(13) Install the oil pump (Refer to 9 - ENGINE/
LUBRICATION/OIL PUMP - INSTALLATION).
(14) Install the oil pan (Refer to 9 - ENGINE/LU-
BRICATION/OIL PAN - INSTALLATION).
(15) Install the drain plug. Tighten the plug to 34
N·m (25 ft. lbs.) torque.
(16) Install new rear main seal. (Refer to 9 -
ENGINE/ENGINE
SEAL - REAR - INSTALLATION).
BLOCK/CRANKSHAFT
Fig. 45 Crankshaft End Play Measurement
1 - DIAL INDICATOR
2 - CRANKSHAFT
(17) Lower the vehicle.
(18) Install the spark plugs. Tighten the plugs to
37 N·m (27 ft. lbs.) torque.
(19) Fill the oil pan with engine oil to the safe
mark on the dipstick level.
(20) Connect negative cable to battery.
CRANKSHAFT OIL SEAL -
FRONT
DESCRIPTION
Both the crankshaft front seal and rear main seal
are a one piece viton seal with a steel housing. The
front seal is located in the engine front cover. The
rear seal is located in a bore at the rear of the engine
block, the crankshaft protrudes through the rear
main seal.
OPERATION
The crankshaft seals prevent oil from leaking from
around the crankshaft, either from the rear of the
engine or from the engine front cover.
REMOVAL
The oil seal can be replaced without removing the
timing chain cover, provided that the cover is not
misaligned.
(1) Disconnect the negative cable from the battery.
(2) Remove
ENGINE/ENGINE BLOCK/VIBRATION DAMPER -
REMOVAL).
OIL
vibration damper (Refer
AN
to 9 -