Belt squeal with A/C off, gone when ON???
I have isolated the squeal under the hood when I start up and when the cab A/C is off. When I turn on the air conditioner it goes away. I changed out the belt tensioner and serpentine belt after 8 y...
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I put the belts side by side and they are identical in length, or so it seems. Obviously the original is shorter thus giving a tighter tension. But it's not visible to the naked eye. This has an automatic belt tensioner and it was replaced 20K ago. It works fine. I am not sure if it was Napa. I am looking for the receipt. I know I shopped around for a high quality belt. I don't go cheap. I don't want to have a trip ruined with mechanical issues. I do most of the PM myself and replace components per Ford, that's why I changed out a perfectly good belt at 50K.
