Trouble Shooting
- Very high frequency whine before engine starts; engine starts ok May be due to excessive distance between pinion gear and flywheel/drive plate gear. Shim starter motor toward flywheel/drive plate.
- Very high frequency whine after engine starts with ignition key released. Engine starts ok. Insufficient distance between starter motor pinion gear and flywheel/drive plate runout can cause noise to be intermittent.
- A loud "whoop" after engine starts while starter motor is engaged Most probably caused by overrunning clutch. Clutch replacement normally corrects this condition. Replace overrunning clutch or drive assembly.
- A "rumble", "growl, or "knock" as starter motor coasts to stop after engine starts Most probable cause is bent or unbalanced starter motor armature. Armature replacement normally corrects this condition. Replace starter motor armature.