Installing Rocker Arm Stud; Cleaning Valve Guide - Pontiac Grand Prix Service Manual

6-52 1969
PONTIAC SERVICE MANUAL
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. Coar rocker arm stud with white lead and oil and
place rocker arm stud installer J 23342 on stud in place
of rocker arm and ball.
12. Carefully drive stud into cylinder head until tool J
23342 has seated on machined rocker stud boss (Fig. 6
89).
13. Install push rod, rocker arm, ball and rocker arm
ball retaining nut.
14. Replace push rod cover, intake manifold and
rocker arm cover.
15. Connect battery cable and refill radiator.
SCREWED IN STUDS
-
REMOVE AND REPLACE
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. Ibs.
6. Install rocker arm cover using new gasket.
CYLINDER HEAD AND VALVES
-
RECONDITION
CYLINDER HEAD AND VALVES - DISASSEMBLE
1. Remove valve spring retainer cup locks (keepers),
valve stem oil seals, valve spring retainer 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 VALVES
-
CLEAN 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 will permit
oil to be pulled into the combustion chamber, causing
fouled spark plugs and clogged piston rings. Oil
deposited on valve heads will carbonize and burn,
causing valves to leak with resultant loss of engine
power. Therefore, valves must operate properly and if
Inspection discloses any malfunction of valves, the
trouble must be corrected to avoid future damage to
valves or related engine parts.
1. Inspect valves and seats to determine condition
before cleaning. Also water passage plugs for evidence
of leakage.
2. Clean valves thoroughly to remove deposits from
head and stem.
3. Clean and inspect cylinder head as follows:
a. Clean carbon deposits from combustion chambers
and all sludge or foreign matter from other areas of
cylinder head. If a scraper or wire brush is used for
cleaning, use care to prevent damage to valve seats.
CA UTZON: To prevent damage to valve seat, it is good
practice to keep wire brush well away fiom seat.
b. Clean cylinder head thoroughly, using suitable
cleaning equipment.
Fig. 6-89 Installing Rocker Arm Stud
Fig. 6-90 Cleaning Valve Guide