For about the past year, the belt on our Fusion makes a chirp on colder mornings. It's not a constant squeal, just a chirp. The noise is consistent with each rotation of the belt, so it seems like a portion of the belt may be glazed. This morning I started it up, chirping was there; I sprayed some water on the ribbed side of belt, and the noise instantly stopped. So it seems like a belt issue, but I'm wondering if the noise is a result of pulley misalignment?
I looked at each pulley while the engine was running, and I didn't see any wobble. I also looked along the length of the belt, and it seemed to run true. The tensioner pulley moved in and out a bit with RPM variation while the engine was warming up, but it was almost unnoticeable. I shut the engine off and tried wiggling each pulley by hand. All were rock solid. The are 2 plastic idler pulleys, which by nature will have more flex than a steel pulley, but both were solidly mounted with little flex.
FWIW, the one edge of the belt has the slightest amount of cord showing; maybe it rubbed on something?
I looked at each pulley while the engine was running, and I didn't see any wobble. I also looked along the length of the belt, and it seemed to run true. The tensioner pulley moved in and out a bit with RPM variation while the engine was warming up, but it was almost unnoticeable. I shut the engine off and tried wiggling each pulley by hand. All were rock solid. The are 2 plastic idler pulleys, which by nature will have more flex than a steel pulley, but both were solidly mounted with little flex.
FWIW, the one edge of the belt has the slightest amount of cord showing; maybe it rubbed on something?