Pontiac FIREBIRD 1972 Service Manual page 546

1972 PONTIAC SERVICE MANUAL
OIL P U M P
REMOVE
4. Check inside of cover for wear that would permit oil
to leak past the ends of gears.
5. Check the oil pick-up screen for damage to screen, or
relief grommet.
1. Drain oil and remove oil pan as previously outlined.
6. Check pressure regulator valve plunger for fit in
body.
2. Remove two flange mounting bolts and nut from
elongated number 6 main bearing cap bolt and
remove pump and screen as an assembly.
3. Remove 4 cover attaching screws, cover, gasket, idler
gear and drive gear and shaft (Fig. 6-52).
4. Remove pressure regulator valve and valve parts.
5. Wash all parts in cleaning solvent and dry using com-
pressed air.
CAUTION: Do not disturb oil pickup pipe on
screen or body. This pipe is located at assem bl'
INSPECT
Should any of the following conditions be found during
inspection operations, the pump assembly should be re-
placed.
1. Inspect pump body for cracks or excessive wear.
2. Inspect oil pump gears for excessive wear or damage.
3. Check shaft for looseness in the housing.
PICKUP
SCREW
ASSEMBLY
PRESSURE
REGULATOR
VALVE
b
PRESSURE
COVER
'
SPRING
SCREWS RETAINER
Fig. 6-52 Oil Pump
-
Exploded View
REPLACE
1. Place drive gear and shaft in pump body.
2. Install idler gear so that smooth side of gear will be
toward the cover.
3. Install a new gasket to assure correct end clearance
of the gears.
4. Install cover and attaching screws. Tighten screws to
6 lb. ft. and check to see that shaft turns freely.
5. Install regulator valve plunger, spring, retainer and
pin and install oil line to pump body loosely.
6. Align oil pump drive shaft to match with distributor
tang, then install oil pump to block positioning flange
over distributor lower bushing. Use no gasket.
Tighten bolts to 9 lb. ft. (Oil pump should slide easily
into place. If not, remove and relocate slot or locate
other problem).
7. Install oil pan using new gaskets and seals as outlined
under Oil Pan Installation.
REAR M A I N BEARING OIL SEAL
REMOVE AND REPLACE
The rear main bearing oil seal (Fig. 6-53) can be removed
(both halves) without removal of the crankshaft.
Always replace both upper and lower seal together.
1. Remove engine oil pan.
2. Remove rear bearing cap.
3. Remove oil seal from groove, prying from bottom,
using a small screwdriver. (Always clean crankshaft
surface before installing a new seal).
4. Insert a new seal well lubricated with engine oil in
bearing cap groove (keep oil off of parting line sur-
face, as this surface is treated with glue) gradually
push with a hammer handle until seal is rolled into
place.