Fulltext TSBs

Technical Service Bulletins

TSB
96-14-9
  • FRONT END ACCESSORY DRIVE (FEAD) “SQUEAL/HOOT” – DURING COLD START-UP AFTER COLD SOAK BELOW -18 DEGREES C (0 DEGREES F)
  • NOISE – “SQUEAL/HOOT” FROM FRONT END ACCESSORY DRIVE (FEAD) AREA – DURING COLD START-UP AFTER COLD SOAK BELOW -18 DEGREES C (0 DEGREES F)
Publication Date: JULY 1, 1996

FORD:
1991-1996 THUNDERBIRD
1994-1996 MUSTANG
LIGHT TRUCK:
1991-1994 EXPLORER
1991-1995 AEROSTAR
1997 F-150

ISSUE:

Some vehicles may experience a “squeal/hoot” noise during cold start-up (usually after cold soak at temperatures of -18C/0F (or below) coming from the Front End Accessory Drive (FEAD) area. This may be caused by the tolerance of the grease being used within the idler pulley bearing in cold temperatures.

ACTION:

Confirm the noise is coming from the idler pulley (or the tensioner pulley bearing for the 4.0L Explorer) and replace the idler pulley which has a revised composition grease to reduce the possibility of noise in cold temperatures. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

  1. Using a technician’s stethoscope, check for noise at the idler pulley (4.0L Explorer, at the tensioner pulley bearing).

    WARNING:DO NOT RUN THE ENGINE FOR MORE THAN 30 SECONDS WITH THE FEAD BELT REMOVED.

  2. Remove the FEAD belt and start the engine. With the engine running, check to see if the noise is still present. If the noise is not present, proceed to Step 3. If the noise is still present, this TSB is no longer applicable.
  3. Replace the idler pulley with a revised idler pulley selected from the following Application Chart. Refer to the appropriate model/year Service Manual for removal and installation procedures.

    NOTE:THE BOLT SECURING THE IDLER PULLEY TO THE TENSIONER ASSEMBLY IS A LH THREAD AND SHOULD BE TORQUED TO 40.7 N-m (30 LB-FT) MINIMUM.


    APPLICATION CHART
    Model YearEngineVehiclePart Number
    1991-963.8LThunderbird/CougarF6PZ-8678-AB
    1994-963.8LMustangF6PZ-8678-AB
    1991-954.0LAerostarF5PZ-8678-AA
    1991-944.0LExplorerF5PZ-8678-AA
    19974.6LF-150F6PZ-8678-AB



PART NUMBERPART NAME
F5PZ-8678-AAIdler Pulley
F6PZ-8678-ABIdler Pulley

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATIONDESCRIPTIONTIME
961409AReplace Idler Pulley Or Tensioner Pulley0.3 Hr.

DEALER CODING

BASIC PART NO.CONDITION CODE
867856

OASIS CODES:

497000, 702000, 702100