GM Firebird 1982-1992 Repair Guide

Air Cleaner


See Figure 1

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Fig. Fig. 1: Air filter housing and air intake duct-Carbureted vehicle

The air cleaner has a dual purpose. It not only filters the ducted air entering the engine, but also acts as a flame arrester if the engine should backfire. If an engine maintenance procedure requires the temporary removal of the air cleaner, remove it; otherwise, never run the engine without it.


Carbureted and Throttle Body Injected Engines

See Figures 2, 3 and 4

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Fig. Fig. 2: Removing the air cleaner cover retainer-Carbureted vehicle

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Fig. Fig. 3: Remove the air cleaner cover from the housing assembly-Carbureted vehicle

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Fig. Fig. 4: Lift the air filter from the housing-Carbureted vehicle

  1. Clean the dirt and foreign material from the top and sides of the air cleaner housing. This will prevent any foreign material from entering the engine, via the intake manifold.
  3. Remove the nut(s) or screw clamp at the top of the air cleaner. Remove the air cleaner from the top of the assembly.
  5. Remove the air filter.

To install:
  1. Clean the inside of the air cleaner housing using a damp cloth.
  3. Install the air filter into the housing.
  5. Install the top of the air cleaner assembly, making sure it is seated properly.
  7. Secure the cover using the clamp fasteners, bolt and/or wing nut(s).

Port Fuel Injected Engines

1985-1992 VEHICLES

See Figure 5

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Fig. Fig. 5: Air cleaner assembly-1985-92 MPFI and TPI engines

The air cleaner assembly on Firebirds equipped with port fuel injection is mounted remotely near the radiator. The air enters the engine by flowing through the air intake duct, throttle body, and into the intake manifold. The air is then directed into the intake manifold runners, through the cylinder heads and into the cylinders.

When removing fasteners, always reinstall them at the same location from which they were removed. If a fastener needs to be replaced, use the correct fastener for that particular application.

To replace the filter assembly, simply remove the retainers from the air cleaner housing, and remove the air filter assembly from the unit.