BMW Coupes and Sedans 1970-1988 Repair Guide

System Components

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REMOVAL & INSTALLATION



1970-79 Models
  1. Raise and safely support the vehicle on jackstands. Remove the 3 nuts retaining the header pipe to the exhaust manifold.
  2.  
  3. Loosen the exhaust holder at the rear of the header pipe, then remove the nuts attaching the rear muffler to the intermediate pipe.
  4.  
  5. The rear muffler can be left in place or removed, depending on the repair to be made.
  6.  
  7. Remove the bolt at the exhaust holder, while holding the intermediate and header pipes with your hand. Remove them from the vehicle. On models equipped with a front muffler (resonator), it will come out with the intermediate pipe.
  8.  

To install:
  1. To install the exhaust system, reverse the removal procedures noting the following:
    1. Coat the header pipe bolts with Molykote® or equivalent and tighten.
    2.  
    3. Align the system correctly before tightening the exhaust holder.
    4.  
    5. Align the tailpipe at the back of the vehicle before tightening the rear muffler-to-intermediate pipe bolts.
    6.  

  2.  

1980-88 Models
  1. Raise and safely support the vehicle on jackstands.
  2.  
  3. Remove the oxygen sensor from the exhaust system.
  4.  
  5. Unfasten the catalytic converter at the exhaust manifold.
  6.  
  7. Loosen the exhaust holder. Unbolt the catalytic converter shield and disconnect the catalytic converter at the flange.
  8.  
  9. Unfasten the shield from the final muffler and unfasten the final muffler at the flange.
  10.  
  11. Disconnect the final muffler and remove it from its hangers.
  12.  

To install:
  1. To install the exhaust system, reverse the removal procedures noting the following:
    1. Coat the catalytic converter-to-exhaust manifold bolts with Molykote® or equivalent and tighten.
    2.  
    3. Align the system correctly before tightening the exhaust holder.
    4.  
    5. Align the tailpipe at the back of the vehicle before tightening the rear muffler-to-intermediate pipe bolts.
    6.  

  2.  

 
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