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All‐Ignition Service Bulletin

Preventing Distributor Drive Gear Failure

Application: Intended for all Gear‐driven distributors

Symptom:Replacement distributors installed into replacement or remanufactured engines result in cam gear or distributor gear failure.

Cause:Replacement distributors installed into replacement or remanufactured engines result in cam gear or distributor gear failure.

Solution:Prime the oil pump using a drill with an attached intermediate shaft. Use drill in clockwise setting until oil pressure develops. Also, before installing the distributor, make sure to lubricate the gear with a coating of grease.

*IMPORTANT NOTE:When installing the replacement distributor, it is important to match the replacement with the original. Comparison points are laid out in the diagram and picture below.

  • Check the play on the camshaft for proper spec
  • Don’t force crank engine or starter into place to position the gear teeth
  • Make sure that the material of the distributor and cam gear match
  • Ensure that after installation the up and down play of the distributor shaft is between .15 and .30

DATA SOURCE: MITCHELL ON DEMAND 2008, A1‐CARDONE 2008, ALL‐DATA PRO 2008