GM Cadillac 1967-1989 Repair Guide

Air Cleaner

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All engines are equipped with dry type air cleaners which use replaceable air filter elements. The positive crankcase ventilation system (PCV) air filter element on gasoline engine is also found in the air filter housing (usually mounted on the inside of the housing rim). Both of these filter elements should be replaced at 30,000 mile or 1 1 / 2 year intervals, unless the vehicle is driven in extremely dusty or smoggy conditions where replacement should be much more frequent.


WARNING
Never remove the air cleaner from a diesel with the engine running. The intake vacuum is very great and dirt, wingnuts, etc. will be sucked directly into the combustion chambers, causing major engine damage.

AIR CLEANER ELEMENT AND CRANKCASE BREATHER REPLACEMENT



See Figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11

The filter element used on all Cadillacs is of the dry, disposable type. It should never be washed, soaked or oiled.

  1. Remove the wing nut(s) from the top of the air cleaner assembly and lay it aside.
  2.  
  3. Remove the air cleaner cover and gently lift the air cleaner element out of the housing without knocking any dirt into the carburetor.
  4.  
  5. Pull the crankcase breather out of the valve cover or remove the clip and remove it from the air cleaner (if so equipped).
  6.  

To install:
  1. Wipe the inside of the air cleaner housing with a paper towel or clean rag.
  2.  
  3. Install a new crankcase breather.
  4.  
  5. Install a new air cleaner element.
  6.  
  7. Replace the air cleaner cover and install the wing nut(s).
  8.  



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Fig. Fig. 1: View of the air cleaner assembly lid



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Fig. Fig. 2: Removing the air cleaner lid



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Fig. Fig. 3: Removing the air filter



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Fig. Fig. 4: View of the air cleaner breather hose



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Fig. Fig. 5: Removing the air cleaner breather hose



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Fig. Fig. 6: Removing the breather element



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Fig. Fig. 7: Removing the vacuum hose from the top of the air cleaner



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Fig. Fig. 8: Removing the intake air duct hose



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Fig. Fig. 9: Removing the vacuum hose from the bottom of the air cleaner



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Fig. Fig. 10: Removing the air cleaner assembly



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Fig. Fig. 11: Installing the air cleaner assembly

 
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