Bad squealing.... - Chevy and GMC Duramax Diesel Forum

07.5-2010 LMM Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 
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post #1 of 9 (permalink) Old 12-06-2012, 06:47 AM Thread Starter
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Bad squealing....

I hear bad squealing after I turn the truck on. 08 3500HD Sierra. Keeps on squealing loud for a few minutes, then gets quieter, but I still hear it. Belts? What to look for? New to diesel. Thanks.

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post #2 of 9 (permalink) Old 12-06-2012, 07:08 AM
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I had the same problem recently. Was doing it for a few weeks, hoping it would go away. I changed the belt, and now I'm squeak free.


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post #3 of 9 (permalink) Old 12-06-2012, 03:04 PM
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I'd say belt, but you can check by just putting a dab of break fluid on the inside of the belt after it has run and with the truck turned OFF, then start it again, if it calms the noise you need a new belt.
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post #4 of 9 (permalink) Old 12-06-2012, 03:15 PM
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Pulleys or belt

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post #5 of 9 (permalink) Old 12-06-2012, 08:44 PM
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Quote:
Originally Posted by dirtymaxxx03 View Post
I had the same problem recently. Was doing it for a few weeks, hoping it would go away. I changed the belt, and now I'm squeak free.
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post #6 of 9 (permalink) Old 12-07-2012, 02:56 AM
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If you do replace the belt, always include a new tensioner and idler pulleys as well. They're cheap, belts aren't.

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post #7 of 9 (permalink) Old 12-25-2012, 04:19 PM
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Quote:
Originally Posted by Dan1969 View Post
I'd say belt, but you can check by just putting a dab of break fluid on the inside of the belt after it has run and with the truck turned OFF, then start it again, if it calms the noise you need a new belt.
^^^How does this tell you you need a new belt???

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post #8 of 9 (permalink) Old 12-25-2012, 11:24 PM
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Originally Posted by ACDiesel345 View Post
^^^How does this tell you you need a new belt???
Brake fluid works as an anti slick compound and causes it to grip, so if you put that on the track lines of the belt it's going to grip, if it makes a difference is the belt, if it still maintains the noise is a pulley.
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post #9 of 9 (permalink) Old 12-26-2012, 08:05 AM Thread Starter
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Resolution to the problem. It was a belt. Got new one on and all squealing gone.

2008 GMC 3500 Dually 6.6
2013 Adam 3 Horse BP
Various GN LQs
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