Dakota 4WD V8-318 52L (1991) Engine Lubrication - Oil Pump Replacement
Oil Pump: Service and Repair
Oil Pump Service
DISASSEMBLY
1. Remove pressure relief valve as follows:
a. Remove cotter pin.
b. Drill a 1/8 inch hole into relief valve retainer cap and insert a self threading sheet metal screw into cap.
c. Clamp screw into vise and while supporting oil pump remove cap by tapping pump body with soft faced hammer.
d. Discard retainer cap, then remove spring and relief valve.
2. Remove oil pump cover bolts and lockwashers and lift off cover.
3. Remove pump outer and inner rotor with shaft, then wash all parts in solvent.
INSPECTION
1. Inspect oil pump cover. Replace if scratched or grooved.
2. Position a straightedge across pump cover surface. If a 0.0015 inch feeler gauge can be inserted between cover and straightedge, replace assembly.
3. Measure thickness and diameter of outer rotor. Replace if thickness is 0.825 inch or less, or diameter is 2.469 inches or less.
