i put a new serpinteen belt on my 95 with a 4.0. and its ok untill i turn on the climate controls then it will squeek. heater or ac doesnt matter. is it too tight or too loose or something else? it didnt do it with the old worn out belt. thanks.

 

Yep its to loose mine did that also tighten it up a good amount and try again. I think the rule of thumb is at the belts longest point try and twist the belt by hand with the vehicle off...Unless ur a total bad ***!!!, it should twist only like quarter way of full rotation

 

haha ya im a bad ***** so ill do it wile its running. thanks.