Chirp or Squeak Noise from Engine Area on Initial Start Up on Ford F-250 Super Duty

A defective idler pulley and / or belt material can cause a chirp or squeak noise from the engine area on initial start up. The idler pulley and / or belt will need to be replaced with revised parts.

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Average mileage: 81,571 (22,000–237,000)
Engines affected: 5.4L V8, 6.0L V8 Diesel Turbo, 6.4L V8 Diesel Turbo, 6.8L V10, 7.3L V8 Diesel Turbo
6 model years affected: 2002, 2003, 2007, 2008, more2009, 2010
19 people reported this problem
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problem details
2009 Ford F-250 Super Duty - 6.4L V8 Diesel Turbo 81,000 mi,
Trucks squeaks on crank up and for the first 30 mins of driving.
2008 Ford F-250 Super Duty - 6.4L V8 Diesel Turbo 85,000 mi,
Idler pulley came apart. Ford fixed without question.
2008 Ford F-250 Super Duty - 6.4L V8 Diesel Turbo 79,500 mi,
Squeaking/chirping noise coming from the idler pulley area.
2007 Ford F-250 Super Duty 42,000 mi,
3.0 l v6 chirps twice on cold starts some times warm. Only right after cranking... crank, start, chirp chirp, runs fine then.
2010 Ford F-250 Super Duty - 5.4L V8 22,000 mi,
had a noise rattle from engine. Dealer said right exhaust was the problem. they fixed it.....not only did the left exhaust blow out 1 month later the noise i brought it in for has not gone away. they said they dont know.