GM Full Size Vans 1987-1997 Repair Guide

Distributor Cap and Rotor

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REMOVAL & INSTALLATION



Carbureted Engines
  1. Remove the engine cover to gain access to the distributor.
  2.  
  3. Remove the feed and module wire terminal connectors from the distributor cap.
  4.  
  5. Remove the retainer and spark plug wires from the cap.
  6.  
  7. Depress and release the 4 distributor cap-to-housing retainers and lift off the cap assembly.
  8.  
  9. Remove the 4 coil cover screws and cover.
  10.  

See Figures 1 through 5



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Fig. Fig. 1: Disengage the feed wires ...



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Fig. Fig. 2: ... and the module harness



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Fig. Fig. 3: After unfastening the spark plug wires and retaining screws, remove the distributor cap:



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Fig. Fig. 4: Unfasten the rotor retaining screws ...



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Fig. Fig. 5: ... then remove the rotor from the distributor housing

  1. Using a finger or a blunt drift, push the spade terminals up out of the distributor cap.
  2.  
  3. Remove all 4 coil screws and lift the coil, coil spring and rubber seal washer out of the cap coil cavity.
  4.  
  5. Remove the two rotor attaching screws (if equipped) and rotor.
  6.  
  7. Using a new distributor cap and rotor, reverse the above procedures to assemble, being sure to clean and lubricate the rubber seal washer with dielectric lubricant.
  8.  

Fuel Injected Engines

See Figures 6 through 9



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Fig. Fig. 6: Tag all the spark plug wires and matching cap terminals before removal



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Fig. Fig. 7: Release the distributor cap hold-down screws



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Fig. Fig. 8: Remove the cap for inspection, replacement or access to the rotor:



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Fig. Fig. 9: Carefully pull the rotor from the distributor shaft. Note that this type of rotor does not have retaining screws

  1. Remove the engine cover to gain access to the distributor.
  2.  
  3. Tag and remove the spark plug wires.
  4.  
  5. Loosen the cap retaining fasteners and remove the cap.
  6.  
  7. Remove the rotor from the distributor shaft.
  8.  
  9. Installation is the reverse of removal.
  10.  
  11. Install the engine cover.
  12.  

INSPECTION



  1. Remove the engine cover to gain access to the distributor.
  2.  
  3. Remove the distributor cap and rotor as described in this section.
  4.  
  5. Check the cap for wear, electrode cracks or damage. Replace if defective.
  6.  
  7. Check the rotor for cracks and wear. Replace if defective.
  8.  
  9. Install the engine cover.
  10.  

 
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