REMOVAL & INSTALLATION
6-300 and V8 Gasoline Engines, exc. the 8-360, 390
See Figure 1
- Remove the oil pan, the oil pump inlet tube and screen assembly. (See Oil Pan Removal.)
- Remove the oil pump attaching bolts and remove the oil pump gasket and intermediate driveshaft.
- Before installing the oil pump, prime it by filling the inlet and outlet port with engine oil and rotating the shaft of the pump to distribute it.
- Position the new gasket on the pump body and insert the intermediate driveshaft into the pump body.
- Install the pump and intermediate driveshaft as an assembly. Do not force the pump if it does not seat readily. The driveshaft may be misaligned with the distributor shaft. To align it, rotate the intermediate driveshaft into a new position.
- Install the oil pump attaching bolts and torque them to 12-15 ft. lbs. on the 6-300; to 20-25 ft. lbs. on the V8s.
See the Oil Pan Removal and Installation procedures above.V6-3.8L
- Remove the oil filter. The oil pump is the assembly to which the oil filter is attached.
- Remove the pump cover attaching bolts, and the cover.
- Lift the pump gears out of the pocket in the front cover, and remove the cover gasket and discard.
- To install, make sure the gear pocket is lightly packed with petroleum jelly, or liberally coat all gear surfaces with an oil conditioner or a heavy engine oil. Do not use chassis lubricants.
- Install the gears in the cover pocket, making sure the petroleum jelly fills all voids between the gears and the pocket.
- Position the cover gasket and install the pump cover. Torque the pump cover attaching bolts to 18-22 ft. lbs.
See Figure 2
- Remove the oil pan.
- Remove the oil pick-up tube from the pump.
- Unbolt and remove the oil pump.
- Assemble the pick-up tube and pump.
- Using a new gasket, install the oil pump and torque the bolts to 14 ft. lbs.
See Figures 3 and 4
- Wash all parts in solvent and dry them thoroughly with compressed air. Use a brush to clean the inside of the pump housing and the pressure relief valve chamber. Be sure all dirt and metal particles are removed.
- Check the inside of the pump housing and the outer race and rotor for damage or excessive wear or scoring.
- Check the mating surface of the pump cover for wear. If the cover mating surface is worn, scored, or grooved, replace the pump.
- Measure the inner rotor tip clearance.
- With the rotor assembly installed in the housing, place a straight edge over the rotor assembly and the housing. Measure the clearance (rotor end play) between the straight edge and the rotor and the outer race.
- Check the drive shaft to housing bearing clearance by measuring the OD of the shaft and the ID of the housing bearing.
- Inspect the relief valve spring to see if it is collapsed or worn.
- Check the relief valve piston for scores and free operation in the bore.
- Components of the oil pump are not serviceable. If any part of the pump requires replacement, replace the complete pump assembly.