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Corvette Forum Archive (38 950 posts)
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Subject: Re: Bad Harmonic Balancer
Date: Tue, 10 Jan 2006 06:57:02 -0800
From: Crabs <IHateSpam(at)SpamSucks.com>
Subject: Re: Bad Harmonic Balancer
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NNTP-Posting-Host: 24.2.59.142
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Steve:
> BTW, do you know the URL for Corvette TSB`s?
>
http://www.alldata.com/TSB/10/981006iS.html
Here`s a start.
Good luck!
TomC
`90 ZR1 #792

From: "Spud" <spud(at)hotmail.com>
Subject: Re: Bad Harmonic Balancer
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NNTP-Posting-Host: 68.127.125.201
Date: Tue, 10 Jan 2006 15:16:28 GMT
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--
Ed McAllister, CCRM
Prime Property Management
"Crabs" <IHateSpam(at)SpamSucks.com> wrote in message
news:aZWdnUKFmo2jVl7eRVn-tw(at)comcast.com...
> Steve:
>> BTW, do you know the URL for Corvette TSB`s?
>>
> http://www.alldata.com/TSB/10/981006iS.html
>
> Here`s a start.
> Good luck!
>
> TomC
> `90 ZR1 #792
Jeez, looked up my `04 LS6. Must be 30 or 40 items.

From: "Dad" <knockers(at)fisher.net>
Subject: Re: Bad Harmonic Balancer
Date: Tue, 10 Jan 2006 11:37:31 -0500
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NNTP-Posting-Host: 216.201.40.106
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"Crabs" <IHateSpam(at)SpamSucks.com> wrote in message
news:m4qdna-G_ovTrV7eRVn-tw(at)comcast.com...
> Steve:
>> I reported in earlier posts that my belts on my `98 C5 were
>> squeaking. I
>> took it to a friend`s shop and he found that the rubber in the
>> harmonic
>> balancer is all worn and wobbling.
I doubt this is the case, it may be loose but no way the rubber is
worn in the balancer. Just to let you know the LS1 has an oil filled
crankshaft and if the bolt comes loose it will allow a black residue
to form. Would have said something earlier but I block spamm.
>> He said the belts are old and dry too.
The belts are old and dry after the first year, it`s called flex and
heat checking.
>> The job is going to cost $679 total, new belts and all. He said
>> it`s a 4
>> hour job to get the harmonic balancer changed. Does that sound
>> about right?
There is a new bolt that is used to reseal the crankshaft and lock the
balancer back on the crank and as far as I know they don`t cost
hundred of dollars. More like an $80 fix.
> Seems about right. It`s a rats nest of pipes, hoses, belts, and god
> knows what in front of the LS1, and there`s little to no room to get
> at anything. All the accessories probably have to come off of the
> front of the motor to access the harmonic balancer, and maybe even
> the radiator and cooling hoses, can`t really tell from the pictures
> I`ve found. Regardless, there`s a lot to be moved around just to get
> a hand down to the area of interest.
>
>>
>> What gets me is that I just had the car at the dealer and they
>> replaced two
>> tensioners. They said it needed new belts to stop the squeaking.
>> Why didn`t
>> they spot the bad harmonic balancer? Can I get away with not
>> replacing it?
Let me guess, because there isn`t one?
>> What happens when one fails?
The outer ring slips and the engine feels like the block is rotating
around the crank.
> It`s kind of hard to see from the top, maybe easier from the bottom.
> It`s not something that usually fails. Before I`d let them work on
> it I`d check to see if there`s any TSB`s out on it.
> To be quite honest, I smell a rat. I`ve owned quite a few cars over
> the years (and most were GM, but not all...) and I`ve NEVER had a
> harmonic balancer go bad.
Same here.
> Now, I`m not saying that it doesn`t happen. It seems to be a common
> failure on newer Mercedes (went surfing the NG`s via Google). Didn`t
> see anything on LS1 HB`s, so I doubt it a big failure item.
> Get a second or third opinion.
> What happens if it fails completely? As it wobbles it`ll chew up the
> front of the motor including timing chain cover & seal, as well as
> maybe the lower pulley and serpentine belt. It could conceivably
> cause timing chain problems and maybe even early crankshaft failure.
Don`t think so but since I`ve never seen one fail on a car it`s a
guess at best. My best guess is that you would certainly feel it long
before it did that much damage unless it happened on the track at wide
open throttle.
>
> Good luck!
> TomC
> `90 ZR1 #792
>>
Just to help your belief/disbelief in what I said I worked in the tool
and machine design department for a tier 1 supplier for harmonic
balancers from 1965 to 1968. We tested them to 20,000 RPM unbalanced
before we got any failures. That was most always ring separation and
not rubber deterioration and the rubber got very hot running like that
when unbalanced.
--
Dad
05 C6 Silver/Red 6spd Z51
72 Shark Black/Black/4spd
Last "Cars" Post on Wordpress: Title: words can't describe this picture Date: Thu, 24 Sep 2009 20:31:23 +0000 Author: supermade
More on: http://supermade.wordpress.com/2009/09/24/words-cant-describe-this-picture/
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Title: Will the IT save the car industry? Date: Sat, 26 Sep 2009 16:33:17 +0000 Author: reportingtheworldover
Future IT services might drive developments able to save today’s car-makers. For new technology to become reality, a much greater openness within the vehicle sector and a radical shift in the way vehicles are viewed is strongly needed.
” The vehicle industry currently views IT services as something that primarily concern the physical vehicle. However, a broader perspective provides the realization that a vehicle is so much more, it is a workplace, a cog in a complex transport flow, a financial asset – but also a cause of accidents and environmental impact,” says Jonas Kuschel, a researcher in applied information technology at the University of Gothenburg.
In his thesis, Vehicle Services, Jonas Kuschel studies the prerequisites for the development of future IT services for vehicles, so-called vehicle services. For example, IT solutions within the vehicle sector might make it possible for a vehicle to automatically book a time for service and repair via a wireless connection, but it might also entail supplying services to town planners to enable understanding of traffic patterns or current emissions levels. The list of potential services can easily be extended.
However, if the perspective is limited to focus on the physical vehicle, there is a risk that the vehicle industry misses out on a lot of new innovations. According to Kuschel, the capacity to develop new inventions and applications requires the vehicle industry to open up its innovation work and allow other actors to enter into the field of developing services.
“It requires the vehicle industry to move from perceiving vehicle services as a part of the product and instead to focus on the services as a part of vehicle usage within a network of actors. It is more important to focus on how a vehicle is used and which role it plays in society and people’s lives than on product development,” says Jonas Kuschel.
More on: http://reportingtheworldover.wordpress.com/2009/09/26/will-the-it-save-the-car-industry/
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