Nissan Z - ZX 1970-1988 Repair Guide

Catalytic Converter/Pre-Muffler

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WARNING
When handling the catalytic converter, be careful not to damage it or have it come in contact with oil, water or other fluids.

REMOVAL & INSTALLATION



  1. Remove the heat shield(s) surrounding the front exhaust tube-to-manifold, the extension tube and the front exhaust tube-to-catalytic converter/pre-muffler.
  2.  
  3. Remove the front exhaust tube-to-manifold nuts.
  4.  

To remove the exhaust tube-to-manifold nuts, if may be necessary to run a die over the stud threads (to remove the rust) and soak the studs/nuts with a rust penetrating substance (to dissolve the rust).


WARNING
If the studs break off, when removing the nuts, it will be necessary to drill out the studs, tap a new hole and replace the studs or drill out the studs, then insert a bolt and nut.

  1. Remove the front exhaust tube-to-converter/pre-muffler bolts, then remove the front exhaust tube.
  2.  
  3. Support the catalytic converter/pre-muffler, then remove the converter/pre-muffler-to-extension tube bolts and the catalytic converter/pre-muffler.
  4.  
  5. Using a putty knife, clean the mounting surfaces.
  6.  
  7. To install, use a new catalytic converter/pre-muffler, gasket(s) bolts, nuts and reverse the removal procedures.
  8.  

 
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