Trouble Shooting
NOTE:
To diagnose starter motor noise, refer to the STARTER TROUBLE SHOOTING CHART .
STARTER TROUBLE SHOOTING CHART
| CONDITION | POSSIBLE CAUSE | CORRECTION |
|---|---|---|
| Very high frequency whine before engine starts; engine starts ok | 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 okay. | Insufficient distance between starter motor pinion gear & flywheel/ drive plate runout can cause noise to be intermittent. | Shim starter away from flywheel/drive plate. Check flywheel drive plate for bent, unusual wear, and excess runout. Replace flywheel/ drive plate as needed. |
| A loud "whoop" after engine starts while starter motor is engaged. | Most probably cause is defective overrun clutch. Overrun clutch replacement normally corrects this condition. | Replace overrun clutch or drive assembly. |
| A "Rumble," "Growl," or "Knock" as starter motor coasts to stop after engine starts. | Most probably cause is, bent or unbalanced starter motor armature. Armature replacement normally corrects this condition. | Replace starter motor armature. |
NOTE:
For additional basic trouble shooting information, refer to the TROUBLE SHOOTING - BASIC PROCEDURES
article in the GENERAL TROUBLE SHOOTING section.