Pontiac tempest 1968 Service Manual page 267

6 - 5 0
1968 P O N T I A C SERVICE MANUAL
NOTE; If left head is being removed, it will be
necessary to raise head off dowel pins, move it
forward and maneuver the head in order to clear
the power steering and power brake equipment if
car is so equipped
c
NOTE: On Firebird models, when removing the
right head on V-8's equipped with A/C, it is nec­
essary to remove the right insulator to frame bolt
and raise engine approximately 2" to gain access
to the right rear valve cover bolt and right rear
cylinder head bolt. Care must be taken to avoid
the fan contacting the fan shroud.
9
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Remove cylinder head gasket.
R E P L A C E
NOTE: Right and left cylinder heads are the
same. New heads are complete with rocker arm
studs (exc. heads with screwed in studs) and all
plugs.
When installing new head, transfer all serviceable
parts to new head, using new seals on intake and
exhaust manifold valve stems, and new exhaust
manifold gasket. Install new intake manifold gasket
plastic retainers. 6lamp straight edge into position
as shown in F i g . 6-86 and check rocker arm position
with valve train gauge J 8928.
1. Remove straight edge from cylinder head and
thoroughly clean gasket surfaces of head and block.
Place new gasket on block, and replace cylinder
head.
NOTE: On Firebird models, when replacing right
cylinder head on V-8 equipped with A/C, it will be
necessary to insert the right rear bolt into the
head before replacing the head on the block.
STRAIGHT EDGE
" END OF G A U G E P R O J E C T S -
STEP DOES NOT PROJECT
BEYOND EDGE OF STRAIGHT EDGE
F i g . 6 - 8 6 Checking Stud Height
2. Start all bolts.
NOTE: Bolts are three different lengths. When
inserted in proper holes all bolts will project an
equal distance from the head. Do not use sealer
of any kind on the threads.
3. Tighten bolts evenly to 95 lb. ft. torque.
4. Install push rods in same location from which
they were removed and with the same end up against
rocker arm.
5. Reposition rocker arms and tighten rocker arm
ball retaining nuts to 20 lb. ft. torque.
6. Replace rocker arm cover and tighten screws.
7. Replace push rod cover and tighten screws.
8. Replace battery ground strap and engine ground
strap on left hand or engine ground strap and auto­
matic transmission oil level indicator tube bracket
on right head. Also replace the engine oil level
indicator on right side.
9. Replace intake manifold using new gaskets.
10. Install exhaust-pip e -to - manifold attaching nuts.
11. On Firebird models, replace right side insula­
tor-to-bracket bolt on A / C equipped V - 8 f s .
ROCKER ARM STUDS-REMOVE AND REPLACE
PRESSED IN STUDS
NOTE: ONLY .005" OVERSIZE STUDS ARE
AVAILABLE. THIS STUD IS TO BE USED IF
STUD HAS BECOME LOOSE, BROKEN OR BE­
CAUSE OF FAULTY THREADS.
The procedures shown are for replacement without
removal of cylinder head. If it is found necessary to
remove the cylinder head for another reason, this
procedure can be used with slight modification.
1. Disconnect battery and drain radiator.
2. Remove rocker arm cover.
3. Pack oily rags around stud and engine openings.
4. With rocker arm removed, file two slots 3/32"
to 1/8" deep on opposite sides of rocker arm stud
(Fig. 6-87). Top of slots should be 1/4" to 3/8"
below thread travel.
5. Place washer at bottom of rocker arm stud.
6. Position rocker arm stud remover J 8934 on
rocker arm stud and tighten screws securely with
5/32" alien wrench.