idler pulley

DybAMX · **Joined:** Tue Aug 05, 2014 8:17 pm **Posts:** 6

Hi everyone, I noticed some noise under the hood last week and discovered my idler pulley was going bad. I ordered a new one from Rockauto and they sent me a grooved pulley I need a smooth one. I went to Advance and another local parts store and they claim the tensioner pulley is smooth and the idler pulley is grooved, which is the opposite of mine. I bought the smooth tensioner pulley, and it was 1/2" bigger and will not fit.

can anyone give me the correct part number for the smooth idler pulley?

thanks

DybAMX · **Joined:** Tue Aug 05, 2014 8:17 pm **Posts:** 6

3.7 v6, 2007 Libby

tommudd · **Posted:** Tue Aug 05, 2014 8:43 pm

Don't have the number right here BUT you should be replacing the whole tensioner along with the pulleys anyways. Comes ready to install with both pulleys on it. Tensioner gets weak over time

dgeist · **Posted:** Tue Aug 05, 2014 8:56 pm

Not sure about your engine, but it should be easy to figure out from the serp belt routing...If it touches the pulley on the inside, it'll be grooved. If it touches on the back, it'll be smooth.

If you already knew that and just wanted part numbers, sorry 'bout that. I wasn't sure :wink:

Dan

DybAMX · **Joined:** Tue Aug 05, 2014 8:17 pm **Posts:** 6

I was not really wanting to do that, as mine has plenty of tension left in it. I have looked at rockauto again and found one that says smooth, but now I am a little gun-shy and don't want to buy another part I don't need

DybAMX · **Joined:** Tue Aug 05, 2014 8:17 pm **Posts:** 6

dgeist wrote:

Not sure about your engine, but it should be easy to figure out from the serp belt routing...If it touches the pulley on the inside, it'll be grooved. If it touches on the back, it'll be smooth.

If you already knew that and just wanted part numbers, sorry 'bout that. I wasn't sure :wink:

Dan

thanks, I know what it's supposed to be, I was hoping to get the correct part number.

tjkj2002 · **Posted:** Tue Aug 05, 2014 9:07 pm

DybAMX wrote:

I was not really wanting to do that, as mine has plenty of tension left in it. I have looked at rockauto again and found one that says smooth, but now I am a little gun-shy and don't want to buy another part I don't need

If one pulley on the tensioner is bad it's more then likely the other will fail soon also.Just put a new tensioner and EPDM belt(Gates) on,all less then $100 and takes 5mins to change.No matter what you may think if your near 100k in mileage that tensioner is almost shot.

DybAMX · **Joined:** Tue Aug 05, 2014 8:17 pm **Posts:** 6

I've already got the grooved one. it's not worth sending back, so I can change that one too.

idler pulley

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