Serpentine Belt Replacement - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #1  
Old 06-28-2006, 11:46 PM
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DixieTBlazer DixieTBlazer is offline
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Serpentine Belt Replacement

Hello All! New member here with an '03 TB. Has anyone changed the serpentine belt yet? Read with interest in the Haynes book about the tensioner pulley having to be between two marks when you remove and install the belt. Can't quite make out where those marks are on the pulley/tensioner. Any tips? Thanks in advance for all responses.
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Old 07-03-2006, 02:50 AM
traildude traildude is offline
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The serpentine belt is very easy to change. Dont worry about the chilton guide thats for removing the whole pulley assembley itself. If you get a 3/8 inch drive ratchet and there is a square place on the pulley to put the ratchet. Once in there push clockwise and everything comes loose. Same way putting it back on.
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Old 07-03-2006, 08:38 AM
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Thanks so much for clearing that up!
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Old 07-03-2006, 10:17 AM
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while on the subject...If you begin to hear a "chirping" sound is that a sign that the belt is going to fail? I visually inspected it and it looks fine (TB only has 51000k miles) but don't want to risk getting stranded. Is it possible that any of the belt driven components would make a noise similar to a "chirp"?
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Old 07-03-2006, 11:58 AM
gary255 gary255 is offline
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I bought an 03 TB back in January and the first thing I noticed was a chirping noise under the hood. Dealer changed the belt. Problem solved!
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Old 07-03-2006, 12:56 PM
Black Ice Black Ice is offline
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Quote:
Originally Posted by gary255
I bought an 03 TB back in January and the first thing I noticed was a chirping noise under the hood. Dealer changed the belt. Problem solved!
I had the same problem during the cool months here, thats when i really noticed it, but the dealer put a new one on and its good now.
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Old 07-03-2006, 01:00 PM
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thanks guys...I'm going to go ahead and replace it now before the inevitable occurs.
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Old 07-03-2006, 03:00 PM
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How many miles do you have? If you're near or over 50,000 I'd consider replacing the tensioner as well. Just my opinion, of course, but you can usually pick one up cheap (haven't priced one for the TB yet). All it took was one experience of replacing a belt and then having the tensioner not keep the belt taut and it chewed up my new $35 belt to convince me to just replace them both.
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Old 07-03-2006, 09:35 PM
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Yep, usually the bearings go in the tensioner pulley causing the pulley to wobble, seize and spit the belt. The idler pulley on the opposite side has a bearing that will eventually go bad as well. You will usually get a whining sound from the idler or tensioner when they are ready to buy the farm. You *usually* get atleast 5yrs/60Kmi+ out of them, some less, some way more.

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Old 07-03-2006, 11:33 PM
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is that it? or do I have to loosen something before I put the drive in there and push clockwise. Your explanation sounds like a very simple job. I'm getting a whining sound and would like to check the pulleys and change the belt.

Thanks.


Quote:
Originally Posted by traildude
The serpentine belt is very easy to change. Dont worry about the chilton guide thats for removing the whole pulley assembley itself. If you get a 3/8 inch drive ratchet and there is a square place on the pulley to put the ratchet. Once in there push clockwise and everything comes loose. Same way putting it back on.
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