Nissan Sentra/Pulsar/NX 1982-1996 Repair Guide

Catalytic Converter

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REMOVAL & INSTALLATION



Exhaust Manifold-Mounted

Some 1982-87 vehicles have a pre-converter in the exhaust manifold. If the pre-converter is broken, remove the under floor converter and remove broken converter pieces.

  1. Raise the vehicle and support safely with jackstands.
  2.  
  3. Remove the lower heat shield from the exhaust manifold.
  4.  
  5. Remove the front pipe from the converter housing.
  6.  
  7. Remove the 5 converter housing bolts and remove the housing and converter from the exhaust manifold.
  8.  
  9. Remove the screen and converter from the housing.
  10.  

To install:
  1. Install the converter and screen into the housing.
  2.  
  3. Install the housing to the exhaust manifold and torque the bolts to 25 ft. lbs. (34 Nm).
  4.  
  5. Install the gasket and front pipe to the converter housing and torque the nuts to 26 ft. lbs. (36 Nm).
  6.  
  7. Install the heat shield and torque the bolts to 10 ft. lbs. (13 Nm).
  8.  
  9. Start the engine and check for leaks.
  10.  

Under Vehicle-Mounted
  1. Remove the converter lower shield.
  2.  
  3. Disconnect converter from front pipe.
  4.  
  5. Disconnect converter from tailpipe.
  6.  

Assemble all parts loosely and position converter before tightening the exhaust clamps. On some models tail pipe and muffler are one piece.

  1. Remove catalytic converter.
  2.  
  3. To install reverse the removal procedures. Always use new clamps and exhaust seals, start engine and check for leaks.
  4.  

 
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