Disassembly & Reassembly

Disassembly procedure not supplied by manufacturer. See Fig 1-10 for exploded views.
When reassembling, ensure pick-up assembly arm is correctly installed on pin. If not, arm can float and cause ignition timing to vary. To prevent corrosion, ensure terminals are lubricated with petroleum jelly before installation.
To prevent heat damage, coat bottom of module and module rest pad in housing with silicone grease. Before installing roll pin in driven gear, ensure timing mark on roll pin and rotor tip align. See Fig 1-10.

Fig 1: Exploded View of HEI-EST Distributor With Sealed Connectors

Courtesy of GENERAL MOTORS CORP.

Fig 2: Exploded View of HEI Distributor

Courtesy of GENERAL MOTORS CORP.

Fig 3: Exploded View of HEI/EST Distributor With Hall Effect

Courtesy of GENERAL MOTORS CORP.