Table of Contents
Advertisement
6A3-4
1977 PONTIAC SERVICE MANUAL
ENGINE INTAKE MANIFOLD OR
GASKET
Removal
1. Disconnect battery.
2. Drain radiator.
3. Remove air cleaner.
4. Disconnect:
a. Upper radiator hose at manifold.
b. Accelerator linkage at carburetor and linkage bracket
at manifold and cruise control chain if equipped.
c. Booster vacuum pipe at manifold.
d. Fuel line at carburetor.
e. Transmission vacuum modulator line.
f. Idle stop solenoid wire (if equipped).
g. Distributor wires.
h. Temperature sending unit wire.
i. Vacuum hoses from distributor T.V.S. and EFE valve
pipe from carburetor to vacuum manifold, fuel economy and
load leveler hose if equipped.
j. Disconnect coolant by-pass hose at manifold.
5. Remove distributor cap and rotor to gain access to left
intake manifold torx head bolt. (Use Tool J 24394) to remove
torx head bolt.
6. Remove accelerator linkage springs.
7. Remove compressor top bracket if equipped.
8. Remove intake manifold
lnstallation
1. Place new intake manifold gasket and rubber manifold
seals in position at front and rear rails of cylinder block. Be
sure pointed end of seal fits snugly against block and head.
Before installing intake manifold seals apply Silastic Sealer
or equivalent to ends of seals. See Fig. 6A3-7.
2. Install one piece manifold gasket and carefully set
intake manifold on the engine block dowel pin.
3. Install manifold to cylinder head bolts.
New intake manifold gasket and seals must be used
whenever a manifold is removed.
When installing manifold, start with the No. 1 and No.
2 bolts. Gradually tighten both bolts until snug. Then
continue with the rest of the bolts in the sequence shown in
Fig. 6A3-8. Torque bolts to specifications.
4. Reverse removal procedure for installation.
5. Connect battery.
6. Close drain plug and fill radiator to proper level.
EXHAUST MANIFOLD
Removal
1. Support vehicle on stands.
2. Remove crossover pipe.
3. Right side-disconnect choke pipe.
4. Left side-disconnect EFE pipe.
5. Remove exhaust manifold bolts and exhaust
lnstallation
1. Install manifold by reversing above procedures.
Fig. 6A3-7 Intake Manifold Seal lnstallation
Fig. 6A3-8 lntake Manifold Bolt Tightening Sequence
231 Engine
2. Torque exhaust manifold bolts to specifications.
ROCKER A R M ASSEMBLY
Removal
1. Remove rocker arm cover and remove rocker arm and
shaft assembly to cylinder head bolts. Remove shaft
assembly.
2. Place assembly on a clean surface.
3. Remove nylon arm retainers by prying them out using
a pair of channel locks. See Fig. 6A3-9.
4. Remove rocker arms and clean in suitable solution.
Inspect for wear. Remove retainer pieces from inside shaft.
lnstallation
1. Install rocker arms on shaft lubricating all parts as
they are assembled with engine oil. V6 engine rocker arms
are installed in production with rights and lefts and must
never be interchanged.
Advertisement
Table of Contents
