GM Camaro 1967-1981 Repair Guide

Air Cleaner

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GENERAL INFORMATION



See Figures 1 through 12

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Fig. Fig. 1: If removing the air cleaner assembly, disconnect the air inlet hose (if equipped) from the air cleaner snorkel ...



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Fig. Fig. 2: ... then remove the retaining wing nut from the air cleaner lid



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Fig. Fig. 3: Lift the lid off the air cleaner assembly ...



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Fig. Fig. 4: ... then remove the air cleaner element from the air cleaner housing



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Fig. Fig. 5: To remove the air cleaner housing, detach the breather hose and other vacuum hoses (if equipped) from the housing ...



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Fig. Fig. 6: ... then lift the housing off of the carburetor



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Fig. Fig. 7: As with the later models, the air cleaner lid on earlier models is also retained by a wing nut



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Fig. Fig. 8: Lift the air cleaner lid off the housing and remove the air filter element



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Fig. Fig. 9: To remove stock air cleaner housings, disconnect the THERMAC vacuum hose after removing the air cleaner hold-down wing nut ...



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Fig. Fig. 10: ... and make sure to disconnect all vacuum hoses from the bottom of the air cleaner housing



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Fig. Fig. 11: Many aftermarket air cleaner housings use an open element air cleaner setup, where the entire perimeter of the air cleaner filter is exposed



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Fig. Fig. 12: The filters in aftermarket housings are removed in the same manner as with stock air filters

The air cleaner has a dual purpose. It not only filters the air going to the carburetor, but also acts as a flame arrester if the engine should backfire through the carburetor.

If an engine maintenance procedure requires the temporary removal of the air cleaner, remove it; otherwise, never run the engine without it. Operating a car without its air cleaner results in some throaty sounds from the carburetor giving the impression of increased power but will only cause trouble. Unfiltered air to the carburetor will eventually result in a dirty, inefficient carburetor and engine. A dirty carburetor increases the chances of carburetor backfire and, without the protection of an air cleaner, fire becomes a probable danger.

The air cleaner assembly consists of the air cleaner itself, which is the large metal container that fits over the carburetor, the element (paper or polyurethane) contained within, and the flame arrester located in the base of the air cleaner.

INSPECTION



If your Camaro is equipped with the paper element, it should be inspected at its first 12,000 miles, rechecked every 6,000 miles thereafter, and replaced after 24,000 miles. 1975 and later Camaro air cleaners should be replaced at 30,000 mile intervals (if the paper type) and 15,000 miles (if the oil wetted type). Inspections and replacements should be more frequent if the car is operated in a dirty, dusty environment.

When inspecting the element, look for dust leaks, holes or an overly dirty appearance. If the element is excessively dirty, it may cause a reduction in clean air intake. If air has trouble getting through a dirty element, the carburetor fuel mixture will become richer (more gas, less air), the idle will be rougher, and the exhaust smoke will be noticeably black.

To check the effectiveness of your paper element, remove the air cleaner assembly and, if the idle increases, then the element is restricting airflow and should be replaced. If a polyurethane element is installed, replace it every 12,000 miles. If you choose to clean it, do so with a suitable solvent. Squeeze out all of the solvent, soak in engine oil, then squeeze out the oil using a clean, dry cloth to remove the excess. The flame arrester, located at the base of the carburetor, should be cleaned in solvent once every 12,000 miles.

 
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