GM Full-Size Trucks 1970-1979 Repair Guide

Distributor Cap and Rotor

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REMOVAL & INSTALLATION



See Figures 1, 2, 3, 4, 5, 6, 7, 8 and 9



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Fig. Fig. 1: The distributor cap on vehicles with 6-cylinder engines is retained by two screws



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Fig. Fig. 2: The 8-cylinder distributor is secured with latches



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Fig. Fig. 3: On vehicles equipped with a 6-cylinder engine, pull the rotor straight up to remove it from the distributor



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Fig. Fig. 4: For vehicles equipped with 8-cylinder engines, you must unfasten the two retaining screws to remove the rotor



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Fig. Fig. 5: Loosen the distributor cap retaining screws ...



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Fig. Fig. 6: ... then carefully remove the distributor cap



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Fig. Fig. 7: Remove the two retaining screws ...



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Fig. Fig. 8: ... then remove the rotor from the distributor



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Fig. Fig. 9: Areas to check on the distributor cap and rotor

  1. Disconnect the negative battery cable.
  2.  
  3. Detach the feel and module wire terminal connectors from the distributor cap.
  4.  
  5. Remove the retainer, then tag and disconnect the 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. Unfasten the 4 coil cover screws, then remove the cover.
  10.  
  11. Using a finger or a blunt drift, push the spade terminals up out of the distributor cap.
  12.  
  13. Remove all 4 coil screws and lift the coil, coil spring and rubber seal washer out of the cap coil cavity.
  14.  
  15. Remove the rotor by pulling it straight up or unfastening the two rotor attaching screws.
  16.  
  17. Using a new distributor cap, reverse the above procedures to assemble, being sure to clean and lubricate the rubber seal washer with dielectric lubricant.
  18.  

 
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