Pontiac firebird 1968 - Page 278

V-8 ENGINE
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 oil 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 it 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 Cap
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 «•—
~~tlJ/64
s
326 AND 4f9
NOTE:
BREAK ALL SHARP CORNERS
2-1/2 R. MSN.
up:
12 DIA,
I.
•3/4*
8 APPROX.
7/32— r-
L 1/4 j
9/64
428
REAR MAIN BEARING OIL SEAL-
REMOVE AND REPLACE
REMOVE
1. Remove oil pan (see Oil Pan - Remove and
Replace)*
2. Remove oil pump and baffle (Fig. 6-107).
3• Remove rear main bearing cap.
4. Use tool shown in Fig. 6-105 made from brass
bar stock to pack upper seal as follows:
OIL BAFFLE
CYLINDER BLOCK
OIL BAFFLE TUBE
Fig. 6-105 Rear Main Bearing Seal Tool Fig, 6-107 Engine Oil Baffle and Dipstick Tube