Pontiac tempest 1968 Service Manual page 229

6-12
1968 P O N T I A C S E R V I C E MANUAL
INDEX THRUST WASHER
TANG IN HOLE IN ROCKER
ARM COVER
Fig. 6-16 Thrust Washer Installation
4. Remove slide hammer and adapter using the
above caution, remove camshaft from rocker arm
cover*
5
C
Remove thrust washer, retaining washer and
bolt from rear of camshaft.
6. Clean all parts in a suitable solvent.
7. Inspect rocker arm cover for cracks or poros­
ity.
8. Inspect gasket surface and front seal area.
9
e
Inspect bearing surface for excessive wear or
scoring.
NOTE: Minor nicks and scratches on edge of
bearing surface can be corrected using a suitable
scraper or file.
\ J 8894
J 8092
10. Inspect rear camshaft plug opening and thrust
washer retaining slot for wear.
11. Inspect camshaft finished surfaces for wear
and scoring.
12. Inspect camshaft oil passages for restrictions.
R E P L A C E
1. Install camshaft from the rear, in rocker arm
cover using caution not to damage bearing surfaces
in rocker arm cover.
2. Install thrust washer in rocker arm cover as
shown (Fig. 6-16).
3. Install retaining washer and bolt. Tighten to
40 lb. ft.
4. Using J 8894 install new oversize camshaft bore
plug until fully seated (Fig. 6-17).
IMPORTANT: A camshaft bore plug not fully
seated could result in excessive camshaft end play.
Correct end play is .003"-.009" when read at the
sprocket end with a dial indicator. Fig
Q
6-18>
NOTE: Lubricate camshaft lobes and rocker arm
pads with Engine Oil Supplement (E.O.S.) before
replacing camshaft and cover assembly. Installa­
tion of new camshaft requires the use of new
rocker arms.
5. Replace thermostat and water outlet fitting.
Tighten to 25 lb. ft.
6. Install rocker arm cover assembly and adjust
camshaft belt as previously outlined.
NOTE: Engine must be run at idle for five min­
utes after installing camshaft. This will ensure
DIAL INDICATOR
Fig. 6-17 Installing Camshaft Rear Plug
Fig. 6-18 Measuring Camshaft End Play