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Old Nov 15, 2012 | 12:30 PM
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Default Katech tensioner
I was having a lot of serp belt chirp issues. I bought a Katech tensioner and a new Gatorback belt. The belt chirping is gone, but now I have a resonance coming from the tensioner. At first I thought I had driveline noise, but upon checking its isolated to the tensioner. I installed it to Katech specs.

Anyone else have this issue?
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Old Nov 15, 2012 | 12:34 PM
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Originally Posted by clegg
I was having a lot of serp belt chirp issues. I bought a Katech tensioner and a new Gatorback belt. The belt chirping is gone, but now I have a resonance coming from the tensioner. At first I thought I had driveline noise, but upon checking its isolated to the tensioner. I installed it to Katech specs.

Anyone else have this issue?
None.
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Old Nov 15, 2012 | 12:45 PM
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No issues here. Did you overtighten the belt? Katech recommends a specific ft/lb tension to be pulled before the tensioner is locked down.
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Old Nov 15, 2012 | 01:04 PM
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What did you tension the belt to?
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Old Nov 15, 2012 | 02:16 PM
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25 ft lbs
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Old Nov 15, 2012 | 02:21 PM
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Originally Posted by clegg
25 ft lbs
You did it right. Does the bearing in the pulley feel okay? They rarely go bad if not over-tightened, but it's possible.
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Old Nov 15, 2012 | 02:38 PM
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It seemed OK when I took the belt loose to check everything. I suppose that it does not have a timken bearing in it?
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Old Nov 15, 2012 | 03:35 PM
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Originally Posted by clegg
It seemed OK when I took the belt loose to check everything. I suppose that it does not have a timken bearing in it?
I don't know much about the bearing. We buy the pulley/bearing as an assembly from an OEM pulley supplier.
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Old Nov 15, 2012 | 04:09 PM
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Check to make sure the tensioner is aligned with the plane of the other pulleys. It's possible (remote) that you'd have to shim it due to other tolerance stacking errors.
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Old Nov 15, 2012 | 05:23 PM
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No, it's aligned.
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Old Nov 15, 2012 | 05:52 PM
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OK-for yucks and chuckles put the old belt back on or alternatively get a standard GM belt and see what happens. If it disappears it's the Gatorback belt-my last and best guess.
Last edited by PhilsFRC; Nov 15, 2012 at 05:54 PM.
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Old Nov 15, 2012 | 05:59 PM
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I'm a firm believer in the "what's changed?" school of thought. You changed two things-tensioner and belt-and created a new problem. Basically it's one or the other part-or both.
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Old Nov 15, 2012 | 06:05 PM
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No it's definately the tensioner.i reinstalled the old auto tensioner with a new idler and quiet as a mouse now.
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Old Nov 15, 2012 | 06:19 PM
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Get with Jason-maybe you got a bad part-happens. Glad you solved your dilemma.
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Old Nov 16, 2012 | 04:57 PM
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Sent out a new pulley today under warranty. They rarely go bad if tensioned properly, but you never know if you got a bad one out of the bunch.
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Old Nov 16, 2012 | 05:03 PM
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Thanks Jason, great service.
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