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Home >> GMC >> 1987 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - HEI-Est (TBI Models) >> Overhaul >> Disassembly
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Ignition System - HEI-Est (TBI Models): Overhaul: Disassembly

  1. Remove coil connector and disconnect 4-wire EST connector. Remove distributor cap and rotor. Separate pick-up coil leads from HEI module. Mark distributor reassembly reference and remove. Drive out roll pin and remove distributor shaft from housing.
  2. Remove retaining "C" washer, pick-up coil, magnet and pole piece. Remove 2 module attaching screws and capacitor screw. Lift module, capacitor and harness assembly from distributor housing. Disconnect wiring harness from module.