Pontiac tempest 1968 Service Manual page 278

V-8 E N G I N E
8-81
3
0
Inspect pressure regulator ball to see that It
Is not nicked or otherwise damaged.
4. Inspect pump body, driven gear shaft and cover
for evidence of wear.
5. Inspect pump gears and end of drive gear shaft
for wear (Fig. 6-104).
6. Inspect o i l pump drive shaft (distributor to
pump shaft) for evidence of wear and cracks.
ASSEMBLE
1. Install drive and driven gears.
2. Install cover and turn drive shaft by hand to en­
sure that i t turns freely.
3. Install pressure regulator ball, spring and
retainer.
IMPORTANT; Oil pressure regulator spring on
GTO or 428 may be identified by noting appearance
of distributor drive gear. If gear is cadmium
plated, oil pump spring will be 60 psi pressure.
Engines with unplated gear will have 50 psi spring.
The 60 psi spring must not be used without cad­
mium plated gear.
J 7588
Fig, 6-106 Forming New Seal in C a p
CAUTION: Do not attempt to change oil pressure
by varying length of pressure regulator valve
spring.
NOTE:
BREAK ALL SHARP CORNERS
2-1/2'R. MIN.
^
• 8 APPROX.
-1/2 DIA.
5/16 « • —
~ ~ t l J / 6 4 s
326 AND 4f9
NOTE:
BREAK ALL SHARP CORNERS
2-1/2 R. MSN.
up:
12 DIA,
I .
•3/4*
8 APPROX.
7 / 3 2 — r -
L
1/4
j
9/64
428
REAR MAIN BEARING OIL SEAL-
REMOVE AND REPLACE
REMOVE
1. Remove o i l pan (see Oil Pan - Remove and
Replace)*
2. Remove o i l pump and baffle (Fig. 6-107).
3• Remove rear main bearing cap.
4. Use tool shown in F i g . 6-105 made from brass
bar stock to pack upper seal as follows:
OIL B A F F L E
C Y L I N D E R BLOCK
OIL B A F F L E T U B E
F i g . 6-105 Rear Main Bearing Seal Tool Fig, 6 - 1 0 7 Engine O i l Baffle and Dipstick Tube