Remove And Replace - Pontiac tempest 1968 Service Manual

6-44
1968 P O N T I A C SERVICE MANUAL
2 . Straighten tabs on manifold front and rear in­
dividual bolt locks and remove manifold attaching
bolts, manifold, and gaskets.
NOTE; Locks are used on front and rear pairs of
bolts only.
R E P L A C E
1. Thoroughly clean gasket surfaces of cylinder
head and exhaust manifold. Check condition of heat
control valve and related parts.
2. Replace exhaust manifold and new gasket. Use
new individual manifold bolt locks on front and rear
pairs of bolts.
NOTE: Place manifold outlet in position over end
of exhaust pipe but do not permit weight of mani­
fold to rest on exhaust pipe. Since the end holes
of gasket are slotted, installation of gasket may be
simplified by first installing manifold, using only
the front and rear bolts to retain manifold. Allow
clearance of about 3/16 fl between cylinder head and
exhaust manifold. After inserting gasket between
head and manifold, the remaining bolts may be
installed.
3. Tighten all bolts evenly and securely to 301b. ft.
torque. Bend tab of screw locks against bolt heads.
NOTE: Be sure tabs are bent against sides of bolt
heads, not on top of bolt heads.
4. Attach exhaust pipe to manifold with bolts and
tighten to 30 lb. ft.
LEFT SIDE EXHAUST MANIFOLD OR GASKET-
REMOVE AND REPLACE
REMOVE
1. Remove generator belt and remove generator
and mounting bracket as an assembly.
2. Disconnect exhaust pipe from manifold.
3. Remove carburetor air pre-heater shroud.
4. Straighten tabs on manifold individual bolt locks.
(Tabs can be straightened from beneath car by using
long-handled screwdriver.)
NOTE: Locks are used on front and rear pairs of
bolts only.
5. Remove manifold attaching bolts and remove
manifold.
R E P L A C E
1. Thoroughly clean gasket surfaces of cylinder
head and exhaust manifold.
2. Place manifold in position against cylinder head
and install two end bolts, finger tight.
3. Slide gasket between manifold and cylinder
head.
4. Install remaining bolts and new bolt locks.
5. Tighten all bolts evenly and securely to 30 lb.
ft. torque. Bend tabs of bolt lock against bolt heads.
6. Install carburetor air pre-heater shroud.
7. Attach exhaust pipe to manifold and tighten to
30 lb. ft. torque.
INTAKE MANIFOLD OR GASKET-
REMOVE AND REPLACE
REMOVE
1. Drain water from radiator and from each side
of cylinder block.
NOTE: Most water can be drained from the block
through radiator drain by raising rear end of car
approximately 15 to 18" off floor.
2. Remove air cleaner and disconnect closed ven­
tilation pipe at air cleaner, air cleaner vacuum
source at manifold and hot air duct by loosening
clamp holding elbow to snorkel.
3. Remove water outlet fitting bolts and position
fitting out of way, leaving radiator hose attached.
4. Disconnect heater hose from fitting.
5. Disconnect wire from thermogauge unit.
6. Remove spark plug wire brackets from manifold.
7. On cars equipped with power brakes, remove
power brake vacuum pipe from carburetor.
8. Disconnect distributor to carburetor vacuum
hoses.
NOTE: Vacuum retard hose is located at lower
rear of vacuum unit.
9. Disconnect fuel line connecting carburetor and
fuel pump.
10. Disconnect crankcase vent hose from intake
manifold.
11. Disconnect throttle rod from carburetor.
12. Remove screws retaining throttle control
bracket assembly.