Pinion Clearance
- 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.
- 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). See Fig 1. Clearance is not adjustable. If clearance is not within specification, check for worn parts.
Courtesy of GENERAL MOTORS CORP.