How to replace a serpentine belt on a Cadillac?

Answer 1

you need a 1/2 inch drive breaker bar to fit the square hole in the spring loaded tensioner and release the tension on the belt so you can remove the old belt from the closest pully you can reach at the same time. Make sure you have a diagram of how it goes back on before you take it off. The tensioner is a pully affair located in the belt path and you find it by looking for the 1/2 inch square drive "hole". When you get the new belt on all the pullys except the last one you have to release the tension again with the 1/2 inch breaker bar while you slip the belt over the final pully. It helps to have a 2 foot water pipe on the breaker bar to make it easier to release the tension while you work the belt. A helper would be useful also.