Pinpoint Test E: Unusual Starter Noise

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

E1 CHECK THE STARTER MOTOR MOUNTING
- Inspect the starter motor mounting for cracks.
- Check the starter motor mounting bolts for looseness.
- Check the starter housing to confirm a flush, tight fit to the rear cover plate.
- Is the starter motor mounted correctly?
1. YES : Go to E2.
2. NO : REINSTALL the starter motor correctly. REFER to Starter Motor - 4.2L or Starter Motor - 4.6L, 5.4L in this article.
E2 INSPECT THE STARTER MOTOR
- Key in OFF position.
- Connect a remote starter switch between the starter solenoid B- and S- terminals.
  
  Fig 1: Inspecting Starter Motor
  Courtesy of FORD MOTOR CO.
- Engage the starter motor and verify that the noise is due to the starter operation.
- Is the noise due to the starter motor engagement?
1. YES : Go to E3.
2. NO : REFER to ENGINE SYSTEM - GENERAL INFORMATION article to continue the diagnosis.
E3 CHECK FOR UNUSUAL WEAR
- Remove the starter motor. Refer to Starter Motor - 4.2L or Starter Motor - 4.6L, 5.4L in this article.
- Inspect the ring gear for damaged or worn teeth.
- Is the noise due to ring gear tooth damage?
1. YES : INSTALL a new flexplate/flywheel ring gear. EXAMINE the starter pinion teeth. If damaged, INSTALL a new starter motor. TEST the system for normal operation.
2. NO : INSTALL a new starter motor. REFER to Starter Motor - 4.2L or Starter Motor - 4.6L, 5.4L in this article. TEST the system for normal operation.