Pontiac FIREBIRD 1972 Service Manual page 572

6-60 1972 PONTIAC SERVICE MANUAL
installation of gasket may be simplified by first in-
stalling manifold, using only the front and rear bolts
to retain manifold. Allow clearance of about 3/16"
between cylinder head and exhaust manifold. After
inserting gasket between head and manifold, the re-
maining bolts may be installed.
4.
On all except 307 engines, tighten all bolts evenly and
securely to 30 lb. ft. On the 307 engine, torque center
bolts to 30 lb. ft. and end bolts to 20 lb. ft. Bend tab
of screw locks against bolt heads (all but 307 en-
gines).
2. On 307 engine, install gasket over two center studs on
cylinder head.
3. Place manifold in position against cylinder head and
install two end bolts, leaving about 1/8" clearance
between head and manifold.
v
4.
On all but 307 engines, slide gasket between manifold
and cylinder head.
5.
Install remaining bolts and new bolt locks.
Be sure tabs are bent against sides of bolt heads, not
on top of bolt heads.
6. Tighten all bolts evenly and securely to 30 lb. ft.,
except end bolts on 307 engine which must be tor-
qued to 20 lb. ft. Bend tabs of bolt locks against bolt
5.
Attach exhaust pipe to manifold with bolts and
heads on all except 307 and 350 engines.
tighten to 30 lb. ft. Install a new flange gasket on 307
engines.
7. Install carburetor air pre-heater shroud (all except
307 engine).
6. 307 Engine
-
Connect battery ground cable.
8. Attach exhaust pipe to manifold and tighten to 30 lb.
7. 307 Engine
-
Install air cleaner pre-heater stove. ft.
9. 307 Engine
-
Install spark plugs.
LEFT SIDE EXHAUST MANIFOLD OR GASKET
REMOVE
ROCKER A R M COVER OR GASKET
REMOVE
1. Remove generator belt and remove generator and
mounting bracket as an assembly.
1. Remove air cleaner.
2. 307 Engine
-
Remove spark plugs.
2. Disconnect crankcase ventilation hoses (as required).
3. Disconnect exhaust pipe from manifold.
4. Remove carburetor air pre-heater shroud (all except
307 engine).
5. Straighten tabs on manifold individual bolt locks (all
except 307 engines). Tabs can be straightened from
beneath car by using long-handled screwdriver.
(Locks are used on front and rear pairs of bolts only
on all except 307 engines).
6. Remove manifold attaching bolts and remove mani-
fold.
REPLACE
3. Disconnect temperature wire from rocker arm cover
clips (remove rear compressor bracket and front ad-
justment bolt on A/C compressor and swing com-
pressor out of way).
4.
Remove rocker cover.
CAUTION: D O NOT pry rocker arm cover
loose. Gaskets adhenng to cylinder head and
rocker arm cover may be sheared by bumping
end of rocker arm cover rearward with palm of
hand or a rubber mallet.
REPLACE
1.
Clean gasket surfaces on cylinder head and rocker
1. Thoroughly clean gasket surfaces of cylinder head
arm cover with degreaser then, using a new gasket,
and exhaust manifold.
install rocker arm cover and torque bolts to
45
lb. in.