Shredding serpentine belts. - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 11 (permalink) Old 03-03-2018, 07:39 PM Thread Starter
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Shredding serpentine belts.

I did the super duty tensioner on my 97 and now Its shredding serpentine belts. It wasn't doing this before just squeaking. Anyone ever have this happen after putting the dual tensioner on?

1997 cc lb 4x4 5 speed tymar 4 inch diamond eye straight pipe, 20 inch Eagle Alloy polished wheels,power hungry 6 pos tuned for stage 1's,idm mod,8000k H.I.D's. 4'' icon front super duty springs with sky 5'' rsk. rear 6'' icons for super duty. bilstien shocks. ebay special grill.
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post #2 of 11 (permalink) Old 03-03-2018, 07:48 PM
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Re: Shredding serpentine belts.

Check the alignment of the pulleys.
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post #3 of 11 (permalink) Old 03-03-2018, 08:17 PM Thread Starter
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It seems like the new tensioner is the issue. The belt is moving to the back of the idler on the tensioner. I don't see anything else right now that would be wrong.
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1997 cc lb 4x4 5 speed tymar 4 inch diamond eye straight pipe, 20 inch Eagle Alloy polished wheels,power hungry 6 pos tuned for stage 1's,idm mod,8000k H.I.D's. 4'' icon front super duty springs with sky 5'' rsk. rear 6'' icons for super duty. bilstien shocks. ebay special grill.
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post #4 of 11 (permalink) Old 03-03-2018, 08:18 PM Thread Starter
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I'm thinking I might need to take the alt bracket off again and make sure everything is tight and the tensioner isn't cocked a little bit

1997 cc lb 4x4 5 speed tymar 4 inch diamond eye straight pipe, 20 inch Eagle Alloy polished wheels,power hungry 6 pos tuned for stage 1's,idm mod,8000k H.I.D's. 4'' icon front super duty springs with sky 5'' rsk. rear 6'' icons for super duty. bilstien shocks. ebay special grill.
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post #5 of 11 (permalink) Old 03-03-2018, 09:35 PM
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Re: Shredding serpentine belts.

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Originally Posted by Bugman View Post
Check the alignment of the pulleys.
Pretty much. Also check the pulleys for Knicks or scratches. But since a modification was made, it's probably ^this.

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post #6 of 11 (permalink) Old 03-03-2018, 09:49 PM
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Re: Shredding serpentine belts.

yeah probably something is cocked cause I did mine and it had worked flawlessly on my truck. because the motorcraft tensioners both move alignment is very critical.

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post #7 of 11 (permalink) Old 03-04-2018, 06:21 AM Thread Starter
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Any tricks to checking alignment other than something obvious when looking at them?

1997 cc lb 4x4 5 speed tymar 4 inch diamond eye straight pipe, 20 inch Eagle Alloy polished wheels,power hungry 6 pos tuned for stage 1's,idm mod,8000k H.I.D's. 4'' icon front super duty springs with sky 5'' rsk. rear 6'' icons for super duty. bilstien shocks. ebay special grill.
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post #8 of 11 (permalink) Old 03-04-2018, 01:41 PM
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Re: Shredding serpentine belts.

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Originally Posted by cams-76 View Post
It seems like the new tensioner is the issue. The belt is moving to the back of the idler on the tensioner. I don't see anything else right now that would be wrong.
Are you sure you have the belt threaded right? Looking at your pix the right side pulley is showing the ribs of the belt? That would not be correct
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post #9 of 11 (permalink) Old 03-04-2018, 04:08 PM
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Re: Shredding serpentine belts.

The ribbed tensioner pulley is supposed to be to the right of the smooth one.

But the pic is waaaaaay too small to see the alignment, and looking forward rather than straight down. Get a shot straight down, and don't resize it down so much.
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post #10 of 11 (permalink) Old 03-04-2018, 06:02 PM
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Re: Shredding serpentine belts.

If you did not get everything cut down on the on the alternator bracket far enough, it will cause an interference issue and push the right side of the tensioner forward, which will make your belt want to walk to the back and get shredded.

I would pull the tensioner back off and make sure there are no clearance issues with the alternator bracket.

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