Cylinder Head And Valve- Recondition - Pontiac tempest 1968 Service Manual

V-8 E N G I N E 6-51
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Fig. 6 - 8 7 Slots Filed in Rocker Arm Stud
7. Place spacer over stud remover J 8934.
8. Thread 7/8" standard nut on stud remover and
turn nut until rocker arm stud is out of cylinder
head (Fig. 6-88).
9. After removing stud, carefully ream stud hole
using reamer J 22126. Stud hole must first be
reamed with pilot shaft attached to reamer. Pilot
shaft should then be removed and stud hole must be
reamed again.
10. Clean stud hole and surrounding area.
NOTE: INSPECT STUD HOLE. IF REAMER DID
NOT CLEAN UP COMPLETELY, IT WILL BE
NECESSARY TO REPLACE CYLINDER HEAD.
11. Remove intake manifold and push rod cover.
12. Position rocker arm on new rocker arm stud
and place rocker arm stud installer J 8927 on stud
in place of rocker arm ball.
J - 8 9 3 4 - 1
J - 8 9 3 4 - 2
J - 8 9 3 4 - 3
F i g . 6-88 Rocker Arm Stud Removal
13. Coat rocker arm stud with white lead and oil;
carefully drive stud into cylinder head until it is in
about halfway (7/16").
14. Clamp straightedge on cylinder head as shown
in Fig. 6-86, and position valve train gauge J 8928
in push rod hole so that it seats properly in rocker
arm.
NOTE: WHEN WORKING ON RIGHT CYLINDER
HEAD, HEATER HOSE CONNECTOR WILL HAVE
TO BE REMOVED BEFORE STRAIGHT EDGE CAN
BE POSITIONED CORRECTLY.
15. With valve seated, slowly drive rocker arm
stud into cylinder head until gauge projects about
midway between end of gauge and step with respect
to straightedge (Fig. 6-86).
16. Install push rod, rocker arm, ball and rocker
arm ball retaining nut.
17. Replace push rod cover, intake manifold and
rocker arm cover.
18. Connect battery cable and refill radiator.
SCREWED IN STUDS
1. Remove rocker arm cover.
2. Remove rocker arm and nut.
3. Using a deep well socket, remove rocker stud.
4. Install new stud and tighten to 50 ft. lbs. torque.
5. Install rocker arm and tighten nut to 20 ft. lbs.
6. Install rocker arm cover using new gasket.
CYLINDER HEAD AND VALVES-RECONDITION
CYLINDER HEAD AND V A L V E S -
DISASSEMBLE
1. Remove valve spring retainer cup locks
(keepers), valve stem oil seals, valve spring r e ­
tainer cups, valve stem shields, valve springs, and
valves, using valve spring compressor J 8062. Valve
stem oil seals must be discarded and replaced with
new seals any time they are removed.
2. Place valves in valve and valve train holding
stand.
CYLINDER HEAD AND V A L V E S -
C L E A N AND INSPECT
Efficient engine performance depends to a great
degree upon the condition of engine valves. Close
inspection of intake valves is especially important
as excessive clearance of valve stems in guides