AC belt jumping off - Pontiac G8 Forum: G8 Forums - G8Board.com
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post #1 of 13 (permalink) Old 07-29-2019, 11:02 AM Thread Starter
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AC belt jumping off

I have an 09 GXP that the AC belt keeps jumping off. I tried the shorter Stretch belt but there is no way it will fit, so it looks like I need the new bracket. Is this kit the one that is recommended. and how big of a job is it to put in?

https://holdenpartsusa.com/collectio...ner-kit-w-belt

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post #2 of 13 (permalink) Old 07-29-2019, 11:52 AM
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Check with Greg at Pace Performance also.

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post #3 of 13 (permalink) Old 07-29-2019, 12:59 PM
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Mine did the same thing multiple times on both my G8s. In both cases changing from the 43" factory length to 42.5" fixed the issue.
5040425 is the shorter belt I've used and love. No need for a new bracket in my case.

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post #4 of 13 (permalink) Old 07-29-2019, 01:17 PM
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https://www.g8board.com/forums/5-v8-...tensioner.html. If necessary, can use the information in the thread to contact the vendor and verify the part numbers. By the way, their price for both the belt and bracket is less than Pace for the bracket alone. Here's another thread ...https://www.g8board.com/forums/5-v8-...ain-again.html. Can pose the ease of replacement question on either thread as well. Good luck.
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post #5 of 13 (permalink) Old 07-29-2019, 01:38 PM
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Quote:
Originally Posted by jerminator View Post
Mine did the same thing multiple times on both my G8s. In both cases changing from the 43" factory length to 42.5" fixed the issue.
5040425 is the shorter belt I've used and love. No need for a new bracket in my case.
Same here. Been 3-4 years with the shorter belt and no throws.


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post #6 of 13 (permalink) Old 07-29-2019, 02:43 PM
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Harmonics...

Changing the belt length doesn't change the underlying problem...

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post #7 of 13 (permalink) Old 07-29-2019, 03:28 PM
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Originally Posted by GXP25 View Post
Harmonics...

Changing the belt length doesn't change the underlying problem...
You are correct, but for $20 I no longer have a belt being thrown versus $200 for the bracket.


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post #8 of 13 (permalink) Old 07-29-2019, 03:48 PM
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Same, $20 fixed my problem. Why wouldn't one at least try it before going the expensive route? :-)
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RotoFab intake, Kooks mids, Solo Axle-Backs
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post #9 of 13 (permalink) Old 07-30-2019, 09:47 AM Thread Starter
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Thanks everyone for the feedback. I ordered the new bracket and since it is my daily driver i got the shorter belt for while i wait.

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post #10 of 13 (permalink) Old 08-06-2019, 07:07 PM
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I just popped the new bracket in my '08 a month or two ago. Some of the bolts were a PITA, but overall easy. Just don't crank anything down until you have all of the bolts started in their proper place. Had to redo the whole thing when the last bolt hole didn't line up 😕

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post #11 of 13 (permalink) Old 08-06-2019, 10:23 PM
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So I was throwing belts and found out it was a bad balancer and workout tensioner didn't help. Check that balancer!!!

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post #12 of 13 (permalink) Old 08-07-2019, 06:38 AM
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Quote:
Originally Posted by jerminator View Post
Mine did the same thing multiple times on both my G8s. In both cases changing from the 43" factory length to 42.5" fixed the issue.
5040425 is the shorter belt I've used and love. No need for a new bracket in my case.

ME also,
new stock tensioner and shorter belt......no more issues

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post #13 of 13 (permalink) Old Today, 04:50 PM
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Changing the belt is PART of your problem. If you do nothing else but change the ac belt....you will probably throw another ac belt with a few months. I strongly suggest changing your ac belt tensioner too due to ange of the car. Also.....you MUST change out crank pulley. The Factory ones wobble due to bad casting (known problem with majority of the LS3/ L76 engines. If yours is stock....take a look with the engine on....it probably wobbles like a bitch.
I changed my crank pulley to a slp underdrive and my ac belt tensioner and have ZERO thrown belts in 3 years so far. Also ZERO crank pulley wobble.

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