High-Pitched Whine While Cranking: Correction

Start engine and carefully touch outside diameter of flywheel with chalk or crayon to show high point of tooth runout when engine is turned off.
NOTE: Saturn starter motors are not shimmed.
Turn engine off and rotate engine by hand so that marked teeth are in area of inspection. If runout is present, flywheel may need to be replaced. Check starter drive gear and starter housing for any unusual conditions that would cause it not to mesh properly. If a problem exists, replace starter motor.