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Home >> GMC >> 1991 >> Magnavan 5.7 K >> Repair and Diagnosis >> Electrical >> Starter >> Starting System >> Starter No-Load On-Vehicle Testing >> Starting System >> Pinion Clearance Bench Testing

Pinion Clearance Bench Testing

  1. Disconnect motor field coil connector from solenoid "M" terminal and insulate it carefully. Connect a battery from solenoid "S" terminal to solenoid frame. Momentarily flash a jumper lead from "M" terminal to solenoid frame.
  2. This shifts pinion into cranking position. Push pinion back toward commutator end to eliminate slack. Distance between pinion and pinion stop should be .010-.160" (.25-4.06 mm). Clearance is not adjustable. If clearance is not within specification, check for worn parts.
Fig 1: Checking Pinion-to-Housing Clearance
G71061Courtesy of GENERAL MOTORS CORP.
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