Pontiac 14014500 Exhaust Manifold Assembly (W/Stove)

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If the engine has been removed from the car, disregard the following steps which do not apply. For vehicles equipped with air conditioning, carefully examine the routing of the A/C hoses and the mounting of the compressor; depending on the system, it may be possible to remove the exhaust manifolds without disconnecting the A/C system. If uncertain, consult a certified dealer or refrigeration specialist to have the system depressurized, and do not disconnect the A/C hoses while under pressure. Begin by disconnecting the negative battery cable and the carburetor hot-air pipe routed from the right exhaust manifold to the air cleaner. Mark each spark plug wire with coded tape (numbered 1-8) before removing them, ensuring to pull on the rubber boot and not the wire itself to avoid mixing up the order. Remove the spark plug wiring heat shields, which are secured with bolts into the engine block, and disconnect the rubber AIR hoses at the manifold check valves. If the vehicle has power steering or air conditioning, remove the brackets attached to the left side manifold. Disconnect the exhaust pipes from the manifold flanges, hanging them from the frame with wire. If bolt locking strips are present, use a screwdriver to pry them away from the exhaust manifold bolt heads to allow for standard wrench use. Remove the exhaust manifold end bolts first, followed by the center bolts, and lift the manifold with its air injection tubes away from the engine. When replacing the exhaust manifolds, transfer the carburetor hot-air stove and the AIR injection tube system. Clean the mating surfaces on the cylinder heads and exhaust manifolds, removing all leftover gasket material, and place new gaskets into position on the cylinder head using a thin film of sealer. Install the manifold, torque-tightening the center bolts first, followed by the end bolts, and consider installing the left rear spark plug heat shield first due to inaccessibility after the exhaust manifold is in place. Reinstall the remaining components in reverse order of removal, using a new gasket or packing at the exhaust manifold-to-exhaust pipe flange. Connect the spark plug wires according to the coded order, which can be verified by tracing each wire to its location on the distributor cap, following the proper clockwise rotation of 1-8-4-3-6-5-7-2. Finally, start the engine and check for exhaust leaks at the junctions of the manifold with the cylinder head and the exhaust pipes.

Clean all old gasket material from the mating surfaces on the cylinder head and manifold.

When replacing the exhaust manifolds with new ones, transfer the carburetor hot-air stove and the AIR injection tube system.

Install the carburetor heat stove pipe from the old manifold.