Dodge dakota 2002 Service Manual page 1649

9 - 400 ENGINE 8.0L
OIL PUMP (Continued)
Fig. 61 Measuring Outer Rotor Clearance in Cover
1 - FEELER GAUGE
2 - OUTER ROTOR
Fig. 62 Measuring Inner Rotor Clearance in Cover
1 - FEELER GAUGE
2 - OUTER ROTOR
3 - INNER ROTOR
Inspect oil pressure relief valve plunger for scoring
and free operation in its bore. Small marks may be
removed with 400-grit wet or dry sandpaper.
The relief valve spring has a free length of approx-
imately 49.5 mm (1.95 inches). The spring should
test between 100 and 109 N (22.5 and 24.5 pounds)
when compressed to 34 mm (1-11/32 inches). Replace
spring that fails to meet these specifications.
If oil pressure was low and pump is within specifi-
cations, inspect for worn engine bearings or other
reasons for oil pressure loss.
INSTALLATION
(1) Lubricate both oil pump rotors using petroleum
jelly or lubriplate and install in the timing chain
cover. Use new parts as required (Fig. 64).
Fig. 63 Measuring Clearance Over Rotors
1 - FEELER GAUGE
2 - STRAIGHT EDGE
Fig. 64 Priming Oil Pump.
1 - FILL WITH PETROLEUM JELLY OR LUBER PLATE
(2) Position the oil pump cover onto the timing
chain cover. Tighten cover screws to 14 N·m (125 in.
lbs.) torque.
(3) Make sure that inner ring moves freely after
cover is installed.
(4) Install the timing chain cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - INSTALLATION).
(5) Squirt oil into relief valve hole until oil runs
out.
(6) Install the relief valve and spring.
DR