Chrysler Full-Size Trucks 1967-1988 Repair Guide

Adjustments

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1972-83 MODELS



Air Gap
SINGLE PICKUP DISTRIBUTOR

See Figures 1, 2 and 3

  1. Raise the hood or engine compartment lid.
  2.  
  3. Remove the distributor cap.
  4.  
  5. Align one reluctor tooth with the pole piece pickup coil. If the truck is equipped with an automatic transmission, bump the starter motor using the key. If it is equipped with a manual transmission, place the truck in 3rd or 4th gear and roll the truck until the tooth is aligned.
  6.  



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Fig. Fig. 1: Air gap adjustment on a single pickup distributor



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Fig. Fig. 2: Single pickup distributor-1972-86 V8 engines



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Fig. Fig. 3: Single pickup distributor with Electronic Spark Advance (ESA)-V8 engines

  1. Loosen the pickup adjusting screw. On 1972-76 models, insert a 0.008 in. (0.20mm) feeler gauge. On 1977 and later models, insert a 0.006 in. (0.15mm), feeler gauge. The gauge should not fit into the gap. Do not try to force it in.
  2.  
  3. Apply vacuum to the vacuum unit and crank the engine. The pickup pole should not hit the reluctor teeth. If it does hit, readjust the gap. If it only hits on one side, the distributor shaft is probably bent and must be replaced.
  4.  
  5. Install the distributor cap.
  6.  

DUAL PICKUP DISTRIBUTOR



See Figures 4 and 5

In the dual pickup distributor, the start pickup is identified by a two-prong male connector. The run pickup is identified by a male and a female plug.



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Fig. Fig. 4: Air gap adjustment on a dual pickup distributor

Start Pickup:

To adjust the air gap on the start pickup, follow the previous procedure for single pickup distributors.

Run Pickup:
  1. Align one reluctor tooth with the pickup coil tooth.
  2.  
  3. Loosen the pickup coil hold-down screw.
  4.  
  5. Insert a non-magnetic feeler gauge 0.012 in. (0.4mm) between the reluctor tooth and the pickup coil tooth.
  6.  
  7. Adjust the air gap so that contact is made between the reluctor tooth, feeler gauge and pickup coil tooth.
  8.  
  9. Tighten the hold-down screw.
  10.  



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Fig. Fig. 5: Dual pickup distributor-1981-86 6-cylinder engines

1984 V8 ENGINES WITH DUAL PICKUP AND VACUUM ADVANCE



Air Gap

In the dual pickup distributor, the start pickup is identified by a two-prong male connector and the run pickup is identified by a male and female plug.

START PICKUP
  1. Align one reluctor tooth with the pickup coil tooth.
  2.  
  3. Loosen the pickup coil hold-down screw.
  4.  
  5. Insert a 0.006 in. (0.15mm) non-magnetic feeler gauge between the reluctor tooth and the pickup coil tooth.
  6.  
  7. Adjust the air gap so that contact is made between the reluctor tooth, the feeler gauge and the pickup tooth.
  8.  
  9. Carefully tighten the hold-down screw.
  10.  
  11. Remove the feeler gauge. There should be no force needed to remove the gauge.
  12.  
  13. Check the air gap with a 0.008 in. (0.20mm) feeler gauge. Do not force the gauge into the air gap.
  14.  

RUN PICKUP
  1. Align one reluctor tooth with the pickup coil tooth.
  2.  
  3. Loosen the pickup coil hold-down screw.
  4.  
  5. Insert a 0.012 in. (0.4mm) non-magnetic feeler gauge between the reluctor tooth and the pickup tooth.
  6.  
  7. Adjust the air gap so that contact is made between the reluctor tooth, feeler gauge and the pickup coil tooth.
  8.  
  9. Carefully tighten the hold-down screw.
  10.  
  11. Remove the feeler gauge. There should be no force required to remove it.
  12.  
  13. Check the air gap with a 0.014 in. (0.35mm) feeler gauge. Do not force the gauge into the air gap.
  14.  

1984-88 V8 ENGINES WITH DUAL PICKUP AND NO VACUUM ADVANCE



Air Gap

In the dual pickup distributor, the start pickup is identified by a two-prong male connector, and the run pickup is identified by a male and female plug.

START PICKUP
  1. Align one reluctor tooth with the pickup coil tooth.
  2.  
  3. Loosen the pickup coil hold-down screw.
  4.  
  5. Insert a 0.006 in. (0.15mm) non-magnetic feeler gauge between the reluctor tooth and the pickup coil tooth.
  6.  
  7. Adjust the air gap so that contact is made between the reluctor tooth, the feeler gauge and the pickup tooth.
  8.  
  9. Carefully tighten the hold-down screw.
  10.  
  11. Remove the feeler gauge. There should be no force needed to remove the gauge.
  12.  
  13. Check the air gap with a 0.008 in. (0.20mm) feeler gauge. Do not force the gauge in the air gap.
  14.  

RUN PICKUP



  1. Align one reluctor tooth with the pickup coil tooth.
  2.  
  3. Loosen the pickup coil hold-down screw.
  4.  
  5. Insert a 0.012 in. (0.4mm) non-magnetic feeler gauge between the reluctor tooth and the pickup tooth.
  6.  
  7. Adjust the air gap so that contact is made between the reluctor tooth, feeler gauge and the pickup coil tooth.
  8.  
  9. Carefully tighten the hold-down screw.
  10.  
  11. Remove the feeler gauge. There should be no force required to remove it.
  12.  
  13. Check the air gap with a 0.014 in. (0.35mm) feeler gauge. Do not force the gauge into the air gap.
  14.  

 
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