1974 GMC MagnavanFACTORY OEM SERVICE PROCEDURE

DELCO-REMY Window: Overhaul: Inspection

Wash all parts in cleaning solvent, except cap, rotor, condenser, breaker plate assembly and vacuum control unit. Degreasing agents may damage insulation of these parts. Inspect breaker plate assembly for damage or wear. Inspect shaft for wear and its fit in bushings in distributor body. If shaft or bushings are worn, they should be replaced. Mount shaft in "V" blocks and check alignment with a dial indicator. Run out should not exceed 0.002". Inspect advance weights for wear or burrs and free fit on their pivot pins. Inspect cam for wear or roughness. Then check its fit on end of shaft. It should be free without any roughness.

Fig 1: DISTRIBUTOR LEAD LOCATION
G09325434Courtesy of GENERAL MOTORS COMPANY
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When to See a Mechanic

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

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