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Pinion Clearance Check

  1. Disconnect motor field coil at solenoid "M" terminal and insulate the field connector. See Figure. Connect a 12-volt positive lead to solenoid "S" terminal and other lead to ground. Touch a jumper lead from solenoid "M" terminal to starter frame, shifting pinion into cranking position.
  2. Push pinion away from stop retainer as far as possible. See Fig 2. Using a feeler gauge, ensure .010-.140" (.25-3.6 mm) clearance exists between pinion and retainer.
NOTE: Pinion clearance is not adjustable. If clearance is not within specification, motor must be disassembled and rechecked.
Fig 1: Cranking Circuit (Typical)
G102069Courtesy of GENERAL MOTORS CORP.
Fig 2: Checking Pinion End Play
G102068Courtesy of GENERAL MOTORS CORP.
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