Fulltext TSBs

Technical Service Bulletins

TSB
09-9-7
  • COLD START FEAD HOOT – WHISTLE NOISE
Publication Date: October 5, 2009

FORD:
2007-2008 Mustang, Expedition, Explorer Sport Trac, Explorer, F-150
LINCOLN:
2007-2008 Mark LT, Navigator
MERCURY:
2007-2008 Mountaineer

This article supersedes TSB 8-4-2 to remove the production build date.

ISSUE:

Some 2007-2008 F-150, Mustang vehicles equipped with a 4.6L and 5.4L engine; 2007-2008 Mark LT, Expedition, Navigator vehicles equipped with a 5.4L engine; Explorer, Mountaineer, Explorer Sport Trac vehicles with 4.6L engine may exhibit a front end accessory drive (FEAD) related high-pitched metallic whistle/hoot noise after a cold soak in ambient temperatures below 40 °F (4.4 °C). This noise may be caused by the grooved nylon FEAD idler pulley.

ACTION:

Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE

NOTE:FEAD IDLER PULLEY NOISE MAY BE MOST APPARENT AT OR NEAR COLD ENGINE IDLE SPEEDS (APPROXIMATELY 1200 RPM). NOISE DURATION IS LESS THAN 10 MINUTES AFTER STARTUP AND WILL BE ELIMINATED WITH FEAD BELT REMOVED.

  1. Replace the nylon FEAD idler pulley, refer to Workshop Manual, Section 303-05.

PART NUMBERPART NAME
6L3Z-6C348-AIdler Pulley

WARRANTY STATUS:

Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.

OPERATIONDESCRIPTIONTIME
090907A2007-2008 F-150/Mark LT 4.6L/5.4L: Replace FEAD Idler Pulley Includes Time To Remove And Install Serpentine Belt (Do Not Use With 8678A, 8620F)0.3 Hr.
090907A2007-2008 Expedition/Navigator: Replace FEAD Idler Pulley Includes Time To Remove And Install Serpentine Belt (Do Not Use With 8678A, 8620F)0.4 Hr.
090907A2007-2008 Explorer/Mountaineer/ Sport Trac 4.6L: Replace FEAD Idler Pulley Includes Time To Remove And Install Serpentine Belt (Do Not Use With 8678A, 8620F)0.4 Hr.
090907A2007-2008 Mustang 4.6L: Replace FEAD Idler Pulley Includes Time To Remove And Install Serpentine Belt (Do Not Use With 8678A, 8620F)0.3 Hr.

DEALER CODING

BASIC PART NO.CONDITION CODE
6c34842