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- COLD START FEAD HOOT - WHISTLE NOISE
| Publication Date: October 5, 2009 |
| 2007-2008 Mustang, Expedition, Explorer Sport Trac, Explorer, F-150 |
| 2007-2008 Mark LT, Navigator |
| 2007-2008 Mountaineer |
This article supersedes TSB 8-4-2 to remove the production build date.
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.
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