yes and brand new ones will squeel when they settle into place especially if they are not the correct belt.... try some belt anti squeel spray on it and see if it goes away and if so then you need a new belt, a correct one.....
the belt on my 96 contour V-6 was changed over to another numbered belt when the TSB for loss of power steering was done on it few years ago.. the dealer put in a regular belt and it lasted for two weeks before it started making noise.. i brought the car in and showed them the TSB listing the correct belt number. they put one on it and never had a problem with it since..... then 6 yrs. later i needed a new belt.. called all the dealers and gave them the number of my belt and they told me that they have another number on it now.. OK, i dont think it will work but i bite and get it.. so far about 2 months no problem with the belt...hope the redesign is correct on this belt...
I checke auto zone, pep boys, advance auto parts, NAPA and some other parts sites and found that on some of the sites that the belts for the contour have two different measurements on it.. about 1/8 in longer on some belts... wonder if this would be a problem?????? never had to get into that as i got info from ford that the new belt i bought was the replacement for the two older belts that were replaced on my car.....