Ignition System - HEI-Est (CALIF): Overhaul: Disassembly

1985 Chevrolet Forward Control 6.2 J, StandardSECTION Disassembly
  1. Remove coil connector and disconnect 4-wire EST connector. Turn 2 latches and lift off distributor cap.
  2. Remove rotor and disconnect pick-up coil leads from HEI-EST module. See Figure. Mark distributor shaft and gear for later reassembly. Drive out roll pin and remove distributor shaft from housing.
  3. 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.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.