Chevrolet Full Size Cars 1979-1989

Catalytic Converter

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Safety glasses should be worn at all times when working on or near the exhaust system. Older exhaust systems will almost always be covered with loose rust particles which will shower you when disturbed. These particles are more than a nuisance and could injure your eye.

REMOVAL & INSTALLATION



Except California Inline 6-Cylinder
  1. Raise and support the front of the vehicle safely using jackstands.
  2.  
  3. Remove the clamp at the front of the converter, then unfasten or cut the pipe at the front of the converter, as applicable. Remember to wear safety glasses when cutting the pipes.
  4.  
  5. Remove the converter-to-intermediate pipe nuts/bolts.
  6.  
  7. Disconnect the converter-to-crossover pipe or front pipe.
  8.  

To install:

  1. Install the converter to the front/crossover pipe and to the intermediate pipe.
  2.  

Always install the catalytic converter into its original position in the exhaust system, the body has heat shields installed in those areas to protect the chassis from the extreme temperatures created by the converter.

  1. Check all clearances, then tighten the fasteners starting at the front of the converter, moving backwards.
  2.  
  3. Remove the jackstands and carefully lower the vehicle.
  4.  
  5. Run the engine and check for leaks, but be careful NOT to touch the hot exhaust pipes. Be especially careful near the catalytic converter.
  6.  

California Inline 6-Cylinder

This model has a catalytic converter mounted to the exhaust manifold in addition to the one under the floor.

  1. Raise and support the front of the vehicle safely using jackstands.
  2.  
  3. Remove the manifold converter-to-front pipe.
  4.  
  5. Remove the manifold converter-to-exhaust manifold nuts.
  6.  
  7. Remove the underfloor converter from the hanger and lower the front pipe with the manifold converter.
  8.  
  9. Remove the manifold converter from the front pipe.
  10.  

To install:

  1. Loosely assemble the exhaust system using new clamps, nuts and bolts.
  2.  
  3. Check alignment, then tighten the fasteners.
  4.  
  5. Remove the jackstands and carefully lower the vehicle.
  6.  
  7. Run the engine and check for leaks, but be careful NOT to touch the hot exhaust pipes. Be especially careful near the catalytic converter.
  8.  



Click image to see an enlarged view

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Click image to see an enlarged view

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