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6A4-6
1977 PONTIAC SERVICE MANUAL
R.H. EXHAUST MANIFOLD
A Series
1. Hoist Car.
2. Remove crossover pipe.
3. Disconnect exhaust pipe.
4. Remove R.F. Wheel.
5. Remove the lower engine mounting bolt and slightly
raise the engine.
6. Remove exhaust manifold from under car.
To install, reverse removal procedure. Refer to Torque
Chart for proper bolt torque.
L.H. EXHAUST MANIFOLD
Fig. 6A4-9
End Seals Installed
5. Position EGR gasket on intake manifold. Install EGR
valve or adapter andWtorque bolts to 25 ft. lbs. See Figure
6A4- 10.
6. Connect temperature gauge wire.
7. Install fuel and vacuum lines.
8. Connect upper radiator hose, spark plug wires, heater
hose, throttle linkage and install air cleaner assembly.
9. Fill cooling system.
NOTE: Refer to Section 6-B for Cooling System
recommendations.
A Series
1. Remove air cleaner.
2. Remove hot air shroud. See Figure 6A4-12.
3. Remove lower geneator bracket.
4. Hoist car.
5. Remove crossover pipe.
6. Lower car.
7. Remove exhaust manifold from above.
To install, reverse removal procedure. Refer to Torque
Chart for proper bolt torque.
VALVE COVER
EXHAUST MANIFOLD
L.H. EXHAUST MANIFOLD
B Series
1. Remove air cleaner.
2. Remove hot air shroud (Fig. 6A4-12).
3. Remove lower generator bracket.
4. Hoist car.
5. Remove crossover pipe.
6. Lower car.
7. Remove exhaust manifold from above.
To install reverse removal procedure. Refer to Torque
Chart for proper bolt torque.
R.H. EXHAUST MANIFOLD
B Series
1. Hoist Car.
2. Remove crossover pipe.
3. Disconnect exhaust pipe.
4. Remove R.F. wheel.
5. Remove exhaust manifold from under car.
To install, reverse removal procedure. Refer to torque
chart for proper bolt torque.
Removal
1. Disconnect positive crankcase ventilation from valve
cover.
2. Disconnect spark plug wires and move away from
valve cover.
3. Remove valve cover to cylinder head attaching screws.
Remove accessory mounting brackets
as
necessary and
remove valve cover. (Fig. 6A4- 13)
Installation
1. Thoroughly clean the head and valve cover gasket
surface then apply 1051435 RTV (Room Temperature
Vulcanizing) sealer or equivalent to the valve cover. (Fig.
6A4- 14)
2. Replace valve cover and torque attaching screws to
fully driven, seated and not stripped.
3. Connect spark plug wires and replace accessory
mounting brackets previously removed. Torque attaching
bolts as follows:
.........................................................
5/16" Thread
25 ft. lbs.
3/8" Thread
.........................................................
35 ft. lbs.
.........................................................
7/16" Thread
50 ft. Ibs.
4. Connect positive crankcase ventilation to valve cover.
ROCKER A R M ASSEMBLIES
Removal
1. Remove valve cover.
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