Pinpoint Test B: Unusual Starter Noise

WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

B1 CHECK STARTER MOUNTING
- Inspect the starter mounting bolts and brackets for looseness, and the starter housing to confirm a flush, tight fit to rear cover plate.
- Is the starter motor mounted correctly?
Yes GO to B2.

No INSTALL the starter motor correctly. refer to STARTER MOTOR . TEST the system for normal operation.
B2 CHECK FOR ENGINE NOISE
- Key in OFF position.
- Connect a remote starter switch between the starter solenoid B and S terminals.
  
  Fig 1: Connecting Remote Starter Switch Between Starter Solenoid B And S Terminals
  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?
Yes GO to B3.

No Refer to ENGINE SYSTEM-GENERAL INFORMATION to continue the diagnosis.
B3 CHECK FOR UNUSUAL WEAR
- Remove the starter motor. refer to STARTER MOTOR .
- Inspect the ring gear for damaged or worn teeth.
- Is the noise due to ring gear tooth damage?
Yes INSTALL a new ring gear. EXAMINE the starter pinion teeth. If damaged, INSTALL a new starter motor. TEST the system for normal operation.

No INSTALL a new starter motor. TEST the system for normal operation.