Ignition System - HEI-Est: Overhaul: Disassembly

On distributors with integral ignition coils, detach 4-wire EST connector and wiring connector from cap. Turn 4 latches and remove cap and coil assembly from lower housing. To remove coil, remove coil cover attaching screws, cover, and coil attaching screws. Lift coil with leads from cap.
Remove rotor. Remove coil arc seal and clean cap with soft cloth, checking for cracks or other damage.
On vehicles with external coils, remove coil connector and disconnect 4-wire EST connector and 2-wire coil connector. Turn 2 latches and lift off distributor cap. Remove rotor.
On all models, disconnect pick-up coil leads from HEI (EST) module. Remove Hall Effect switch (if equipped) by removing 2 attaching screws. Mark distributor shaft and gear for reassembly. Drive out roll pin and remove distributor shaft.
On models with integral coil, remove magnetic shield. On all models, remove "C" washer, pick-up coil, magnet, and pole piece. Remove 2 module attaching screws and capacitor screw (if equipped). Lift module, capacitor, and harness assembly from distributor housing. Disconnect wiring harness from module.