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| COLD START FEAD HOOT – WHISTLE NOISE |
FORD : | 2007-2008 Mustang, Expedition, Explorer Sport Trac, Explorer, F-150 |
| LINCOLN: | 2007-2008 Mark LT, Navigator |
| MERCURY: | 2007-2008 Mountaineer |
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.
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.
- Replace the nylon FEAD idler pulley.
| PART NUMBER | PART NAME |
|---|---|
6L3Z-6C348-A  | Idler Pulley |
