TSB 2007-2008 Mustang TSB 09-9-7 1

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

Click to expand...