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Author Topic: GM BELT TENSIONER FAILURE, AGAIN, GRRRR  (Read 4942 times)

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ffcgary1

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GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« on: 11 December 2009, 19:49:08 »
Although not an omega this is a vectra b with the X30 3.0 ltr engine, and is owned by my brother in law, His car was originaly a 2.5 but suffered tensioner failure and destroyed a good motor by punching a hole in one of the pistons, so i had a X30 engine sitting in my garage and offered it to him as a replacement, Before we fitted it and while it was on an engine stand it was fitted with a new oil cooler and Gen vx belt Kitand replaced all orings and intake seals where needed.
The engine was fitted by a pal who works for vx and the car ran absolutly fantastic untill a couple of weeks ago when it started to missfire and run like a pig
The belt tensioner had collapsed and the belt became lose and jumped 6 teeth and caused valve damage to the rear bank of cylinders. Because the betl was loose it flapped about and the torx bolt just above the tensioner  munched  grove in the belt.
The new TENSIONER HAD DONE JUST 12,000 MILES........
Why are gm not supplying parts that will reach the spec'ed change intervals, it is a scandal that we as owners do everything that vx say we should do and then the parts that we buy are as good as a chocolate teapot.
So the situation is as we type  a dead vectra and gm laughing it's guts out..... i AM VERY p*****d off.
So is my brother in law. >:(
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Jimbob

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #1 on: 11 December 2009, 19:55:16 »
Feel for you, I KNOW that feeling, not good at all.  :'(
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Marks DTM Calib

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #2 on: 11 December 2009, 19:57:05 »
My question is......was the tensioner nut properly torqued up using a torque wrench, was the proper locking kit etc used and was the tension set right?
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ffcgary1

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #3 on: 11 December 2009, 19:59:36 »
Yes mark, the gen vx locking kit was used and nut torqued, i watched him do it so ii know that was all as should be.
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tunnie

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #4 on: 11 December 2009, 20:24:58 »
i have had the beginning of tensioner failure too!

brand new GM belt kit, correctly torqued tensioners, squeeking like hell, so replaced the whole kit. That had done 27k, so again very early!
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Marie

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #5 on: 11 December 2009, 20:34:43 »
I have had the same,  the tensioner managed to get half way through its life buts its bl@@dy lucky i cought it in time.

The job was done correctly when it was changed in 2007 as a famous OOF'er did it for me. :)
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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #6 on: 11 December 2009, 21:26:35 »
Can't believe mine managed 80k  :o
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Kevin Wood

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #7 on: 11 December 2009, 23:17:37 »
Gary, when you say "The belt tensioner had collapsed" what was the exact failure mode? I can see that the bearing might fail, the spring tensioner could go limp or the bolt could work loose. Just wondering, if the failure mode were known, whether potential duds could be spotted or additional meaures taken to avoid failure.

Hi Marie [smiley=vrolijk_26.gif] long time no see! How's it going?

Kevin
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Omegadoha, Desert Member

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #8 on: 12 December 2009, 09:42:59 »
Mine was changed for the first time earlier this year, after 142,000Kms.  :o
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ffcgary1

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #9 on: 13 December 2009, 14:49:27 »
Kevin, the ballraces have failed because the seal keeping the bearings lubricated had leaked the grease out and thus bearings had overheated and failed.  >:(
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Kevin Wood

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #10 on: 13 December 2009, 22:06:25 »
Quote
Kevin, the ballraces have failed because the seal keeping the bearings lubricated had leaked the grease out and thus bearings had overheated and failed.  >:(

Ooh. That's not good. :(

Kevin
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ffcgary1

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #11 on: 13 December 2009, 22:27:50 »
What is most annoying is that GM know that the bearings that they are using are crap. but they still keep bunging em out knowing that if they fail they will just keep washing their hands of the problem. Our problem not theirs. >:(
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Lazydocker

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #12 on: 13 December 2009, 22:40:00 »
Glad I used a Gates kit... Although I must confess I think I'll be changing it early... I've done 30k on it already and it'll be due changing just when I'm busiest ::) ::)
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JamesV6CDX

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #13 on: 13 December 2009, 22:46:19 »
Quote
Kevin, the ballraces have failed because the seal keeping the bearings lubricated had leaked the grease out and thus bearings had overheated and failed.  >:(

That is the mode of failure I usually see too
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Kevin Wood

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Re: GM BELT TENSIONER FAILURE, AGAIN, GRRRR
« Reply #14 on: 13 December 2009, 23:03:43 »
Quote
What is most annoying is that GM know that the bearings that they are using are crap. but they still keep bunging em out knowing that if they fail they will just keep washing their hands of the problem. Our problem not theirs. >:(

Do you know what brand of bearings it had ?

I wonder if it's worth sourcing decent bearings and replacing them?

.. or just use Gates / SKF / Contitech kits...

Kevin
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