What is your question?
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What is your question?
What is the difference between the upper and lower idler pulley? One is ribbed one is smooth. Where are they located
1 Reply
They are located in the front of the engine. Just follow your serpentine belt and you will see the idler pullies. It's common for automakers to use a combo of ribbed and smooth pulleys. Just replace them with the same part and you are good to go. Alex
The only other pulley that I see that is the same size as the one that I purchased is located on the alternator.