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.
Average mileage: 84,200 (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
20 people reported this problem
3.0 l v6 chirps twice on cold starts some times warm. Only right after cranking... crank, start, chirp chirp, runs fine then.