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post #1 of 9 Old 02-14-2017, 04:45 PM Thread Starter
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pulley noise question

This is what mine sounds like.


I've seen the other video


and mine sounded like that when i put the stethoscope onto it. My question is, the whine at rpm increase that I'm having, is that also a symptom? I see no mention of that in other threads or videos.

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post #2 of 9 Old 02-14-2017, 05:21 PM
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I had that problem last year. Tried my stethoscope but the alternator pulley and idler pulley were too close for a definitive answer. You can do some VOM readings on the battery and/or alternator or simply use an infra red thermometer. Tells you right away. Autozone has one for around 30$. Good luck.

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post #3 of 9 Old 02-15-2017, 04:46 AM
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Change the idler pulley anyways. I have changed 3 so far in the life of my JK. The last time it was not needed. After I changed it the sound was still there and it turned out to be the alternator.

Try the cheap fix first.

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post #4 of 9 Old 02-16-2017, 02:18 PM Thread Starter
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Tech confirmed it was the tensioner. Looks like its around $100 for the whole part. Will update when it comes in.

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post #5 of 9 Old 02-16-2017, 07:21 PM
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Quote:
Originally Posted by mvjeeper View Post
Tech confirmed it was the tensioner. Looks like its around $100 for the whole part. Will update when it comes in.
Wasting your money buying the whole tensioner, you an just buy the pulley for 15 bucks.

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post #6 of 9 Old 02-16-2017, 09:19 PM
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Originally Posted by Rb6700 View Post
Wasting your money buying the whole tensioner, you an just buy the pulley for 15 bucks.

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Amen. Takes a couple of minutes.

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post #7 of 9 Old 02-17-2017, 09:43 AM Thread Starter
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Quote:
Originally Posted by Rb6700 View Post
Wasting your money buying the whole tensioner, you an just buy the pulley for 15 bucks.

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Amen. Takes a couple of minutes.
Please show me where because I can't find a part number for it.

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post #8 of 9 Old 02-17-2017, 10:19 AM
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Quote:
Originally Posted by mvjeeper View Post
Please show me where because I can't find a part number for it.
It's the same pulley as the idler pulley. You should buy 2 idler pulleys. Replace the idler pulley the same time as the tensioner pulley.

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post #9 of 9 Old 02-17-2017, 10:50 AM Thread Starter
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Quote:
Originally Posted by Rb6700 View Post
It's the same pulley as the idler pulley. You should buy 2 idler pulleys. Replace the idler pulley the same time as the tensioner pulley.

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Thank god for warranties then. But thanks for the heads up. I remember reading about it but never could find part numbers. I'll remember though for the future.

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