Nissan Z - ZX 1970-1988 Repair Guide

Extension Tube

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The extension tube is located between the muffler and the catalytic converter/pre-muffler. To remove it, the muffler or the catalytic converter/pre-muffler must be removed, whichever is easier.

REMOVAL & INSTALLATION



  1. Refer to the Muffler removal and installation or the Catalytic Converter/Pre-Muffler removal and installation procedures in this section, and remove the muffler or the catalytic converter/pre-muffler.
  2.  
  3. Remove the extension tube from the vehicle.
  4.  
  5. To install, use a new extension tube, clamps, bolts, nuts and/or gasket(s), then reverse the removal procedures.
  6.  

SEALING THE EXHAUST SYSTEM



See Figures 1, 2 and 3

Nissan supplies an exhaust system sealant, which can be installed when the exhaust system is new or the components are clean (bare metal). The Exhaust Sealant Kit No. 20720-N2225, is used to eliminate gas leakage past the joints.



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Fig. Fig. 1: Nissan exhaust sealant kit



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Fig. Fig. 2: Filling the syringe with sealant



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Fig. Fig. 3: Injecting the sealant into the exhaust system

  1. Wipe all of the joint contact surfaces clean and allow them to dry.
  2.  
  3. Mount the exhaust system onto the vehicle.
  4.  
  5. Tighten the U-bolts to 16-22 ft. lbs. (21-39 Nm).
  6.  


CAUTION
If you get exhaust sealant on your skin, it may cause a rash; wash it off thoroughly with water.

  1. For each joint, squeeze 5-6cc of sealant into the injector from the sealant tube.
  2.  

Be sure to replace the cap on the sealant tube, for the sealant will dry out.

  1. Position the injector nozzle to the tube guide and squeeze firmly; the sealant will flow into the guide. When the sealant flows out of the slit of the tube, no further sealant is necessary.
  2.  


WARNING
Be careful not to use too much sealant, for it will clog the tube. When finished, be sure to wash the injector thoroughly in water.

  1. Start the engine and allow it to idle for 10 minutes, to harden the sealant.
  2.  
  3. Before driving the vehicle, check the condition of the sealant. DO NOT accelerate the engine sharply for 20-30 minutes after the procedure.
  4.  

 
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