dachy

Wondering if there is any update, how many cars are actually affected by now?
My car does not appear to be in the affected range of a 2005 build of a crankshaft balancer failure/loose bolt. My vin#55112745 (build date 12/04) and only cars built prior to VIN Breakpoint 55111039 should be affected according to TSB#05-06-01-001D.
My car has only 20K miles and I can tell my harmonic balancer is wobbling a little when engine is running, probably like 1/16. Not sure if this is normal or just beginning to come loose? Belt is fine, no noise etc.
If I need to change it, are there better aftermarket options or should I get OEM balancer?
Can anyone chim in? Thanks!!

Dawgy

I was hopping someone would help here.
This is what I know.From lot's of reading.
My 05 is in the range with 15K S/N 09008.
So far so good.
Crank shaft pin kits are available from Magnuson and from ARP.
There is a bolt that can be reused from ARP.
Also SLP performance parts has a Under drive pulley P/N 100225 for $199.95 you will need a new Dayco belt P/N 5060780.
Will someone add the links for the parts.Please!
Thanks Don

lgm118icbm

My 05 is in the VIN range and let loose after 4 years and 45000 miles.

Luckily I have an extended warranty otherwise I'm sure it would have been costly.

Walt White Coupe

Never heard of an 05 that was out of the range have a problem with a "loose bolt." Zero to a certain amount of wobble is considered normal. There is no defined GE spec on allowable wobble. When the wobble starts to make your main belt chirp, then it's time to replace the pulley because the rubber flexible coupling of the harmonic balancer (pulley) is deformed.

Been there, done that.

vetsvett

If you can see wobble you might wanna get it checked.

Dawgy

With the rubber failing on the OEM parts with few miles.
I would lean towards the after market parts.
Here are some links for you to check out.
Under drive pulley
http://www.slponline.com/view_produc...5&BIG=100225-1
Magnuson pin kit
http://www.magnusonproducts.com/pdf/catalog.pdf *go to page 33
ARP bolt
http://www.arp-bolts.com/Catalog/Catalog.html
Thanks Don

dachy

I did get it checked by GM service, but I was told it's normal ..

Thanks guys for all your inputs ... I can't seem to find a proper parts ... Not all links are working .. any help greatly appreciated.

vetsvett

take it to another mechanic (preferably a trusted one) for a second opinion.

Walt White Coupe

Mine started chirping at 19,000 miles. If it's not chirping don't worry about it. Apparently there are a lot of cars with pulleys that wobble. It's a fairly complicated job to replace it. Mine was done under warranty but I believe others have paid around $900 at a dealer to have it replaced and realigned.

shopdog

The important thing is that the crank bolt is tight. If it is, and the belt isn't chirping, then all you are seeing is normal run out of the dampener ring on its hub. If the bolt is loose, which you can obviously determine with your fingers, then you have the problem from the TSB and need to fix it.

If you do have a bolt that has been unscrewed by a slipping harmonic dampener, then you have two options. You could have your dealer apply the TSB band aid washer. Or you could do a proper fix and pin the dampener to the crank snout.

Dawgy

See if the links work now that they are on the Venders home page.
I could only find the parts in the catalogs.
http://www.magnusonproducts.com/
http://www.arp-bolts.com/
Thanks Don

ufso

Build date 10/04 and within the affected VIN range. In the middle of '05, heard chirping at around 40 MPH...below that nothing. Went for a spirited run of around 100 and came back home. Kept the car running and had the wife give it some gas. After walking around, noticed it came from the engine. Looked at the pulley and it was wobbling slightly.

Shut the car off, let it cool down and proceeded to unscrew the bolt with just my fingers...it was that loose and ready to come unscrewed!!!

Had it fixed under warranty and no problems since...fingers crossed.

Walt White Coupe

ufso,
Sounds to me like you're home free.

Dawgy

USFO
That is a scary thought of the balancer coming off at 100MPH.
Sure glad that it all worked out OK!

ufso

Thanks guys! You should have read on here some of the horror stories back in '05.

The serpentine belt coming off and causing the engine to over heat and fighting with GM to give them extended warranties for their engines.

Throwing oil and rubber all over the engines compartment, damaging all the top of the engine...the stories go on and on!

Even now it's hard to imagine that a similiar problem is rearing it's ugly head again!

Billyac

Hi guys I've been trying to figure out if I am covered under this but can't figure it out my vision is 55107281 can someone tell me after dealer will fix this