Pushrod Engine

Typical engine oiling system:

Fig. 18 Removing oil pan & pump:

REMOVAL
1. Drain crankcase, then remove oil pan as previously described.
2. Remove pump to rear main bearing attaching bolt, then remove pump, extension shaft and retainer, Fig. 18.

Fig. 19 Sectional view of oil pump assembly:

DISASSEMBLE
1. Remove four pump cover to body attaching bolts, then remove cover, idler and drive gears and shaft, Fig. 19. Place align mark on oil pump drive and idler gear teeth so they can be installed in the same position.
2. Remove pressure regulator valve retaining pin, spring and the valve from pump body.




INSPECTION
Inspect pump components and should any of the following conditions exist, the oil pump assembly should be replaced.
1. Inspect pump body, gears and cover for cracks or excessive wear.
2. Check drive gear shaft for looseness in housing.
3. Check inside of pump cover for wear that would allow oil to leak past ends of gears.
4. Check oil pickup screen assembly for damage to screen or pickup tube.
5. Check pressure regulator valve for fit in pump body.

Fig. 19 Sectional view of oil pump assembly:

ASSEMBLE
1. Install a replacement pickup screen and tube assembly, if removed. Position pump in a soft jawed vise, then apply sealer to end of tube and tap into position using tool No. J8369 and a plastic hammer. Use care not to damage inlet screen and tube assembly when installing on pump housing.
2. Place pressure regulator valve, spring and retaining pin into pump body, then install drive gear and shaft.
3. Install idler gear into pump body, then the pump cover gasket. Fig. 19.
4. Install pump cover and cover retaining bolts, then torque bolts to 6---9 ft. lbs.




INSTALLATION
1. Align oil pump extension shaft to distributor drive gear socket and pump housing with dowels on cap, then install shaft retainer and pump assembly.
2. Install oil pump assembly retaining bolt to rear main bearing cap and torque bolt to 26---35 ft. lbs.
3. Install oil pan as previously described.