Well, I have exactly 735 miles on my car and I have to bring it in to the dealer tomorrow.

The bearings in my supercharger **** out on me and the thing sounds like it is going to explode under the hood.

I am pretty dissapointed in the fact that something so major happened with less than a thousand miles on it. Hopefully this isn't a sign of how well the car is put together?

 

I have had mine for a little over 3 months and have about 5000 miles. Not a single issue since I've had it.

 

thats not normal, the eatons are supposed to be really reliable, i have 37,000 miles on my ss s/c, and my s/c hasn't messed up yet and i run the hell out of it.

 

These things happen. Thats why they give you a WARRANTY

 

i wouldnt take that as an example of normal with a cobalt.

You got unlucky....im sure when its fixed youll have no problem with it.

 

Who installed your stage 2? Thats the only reason I could see the bearings failing.

 

They probably beat the hell out of it to get the pulley off,or maybe heated it up and fried the bearing.

 

Sadly enough, It was GM who put the stage 2 kit in it.

I know for a fact they didn't use a supercharger pulle because they say right on the work order that they took the supercharger off the car, which is uneccesary with a puller.

But, it is under warranty so, we will wee what happens.

 

You still need to remove the supercharger. Not enough room to remove the pulley otherwise, with or without a puller!

 

you also need to remove the supercharger to get to the injectors when the stage 2 is installed, ive got 15,000 miles on my car and i drive like the daytona 500 every day to work must be an instalation error GM is a good company they just have stupid mechanics that rush through everything for example when i went to get the new reflash for the stage 2 these are the exact words i hear from the person im trusting my car to "excuse me sir exactly whats a pcm is that an AFTERMARKET upgrade or doe's it come standard". dont blame GM blame stupid people.

 

hmmm...good to know but I could have swore there is enough room?

Oh well, thats only minor details...my supercharger broke...thats the main point here, don't care how, why, when, or how come...I personally think that is inexcusable with 700 miles on the car.

I understand the "bad luck" or "defects happen" arguement though and I agree, just luck of the draw.

 

I"m pretty sure the tech who installed your stg II f'd up something... I"ve done quite a few pulley installs.. I"ve done at least 7-8 on my car alone... maybe a total of 15-20 installs by now... never had one problem with anyone s/c... we've broken everything else on the car, but not that... I have over 15,000 miles on mine.. my friend has 33000 another few have over 20000 miles and all the s/c's are fine...

 

and you def need to remove the s/c to get the pulley off... no way around it.

 

Thanks for the info guys

 

So The Almighty Question... What Were You Really Doing When This Broke?

 

im on my 3rd supercharger.

 

First off...a supercharger shouldn't break because of "Anything" that you "do". The only reason a supercharger should go out is if you are running too much boost or you don't oil the thing (excluding the ones that tap the oil pan). So "what I was doing" really doesn't matter.

However, To be perfectly honest, I wasn't doing anything but driving.

I noticed a metallic gargle sound when I pulled into my garage and I popped open the hood and bam....sounded like crap. Extremely bad.

 

Is it possible that you didn't properly 'Break In' your engine?
You should always wait awhile before putting too much strain on the engine of a brand new car.
Yes, they are high quality engines and cars nowadays, but that doesn't mean you should floor it and drive it like its stolen right off the car lot.

But then again maybe you did break your engine in, who knows?

 

According to the manual in my glove box, there is no "break in" period for the car as all the motors are ran before they are placed into the car.

Although the car had 250 miles on it when it was delivered and I had put another 200 on it before really getting onto it.

I don't think "break in" is the culprit here.

 

If you don't have the right kind of puller, sometimes people wedge something between the rotors to keep them from moving. At that point, it's really easy to put pressure on the wrong thing and **** up the bearings. If possible, have someone else put your stage 2 pulley back on...

Also, I think someone mentioned that you need to remove the s/c to change the injectors...that's not true. You definitely do need to take it off to swap out the stock pulley, though. Once you get the new ring on there, you can swap pullies without removing the s/c.

 

According to GM it is the stage 2 belt? It is defective?

Guess I will see when I get my car back tomorrow

 

i can definately assure you as the members of this forum already have that this is in no way a common issue with these cars in fact in the last 2 years the dealer i work for has sold over 20 cobalt ss/sc's and have yet to see one some back for anything other than the petty sunroof button, axles click and paint flakes on pull cup issues. that any newer production car will have.

exept for 2 exceptional issues of owner abuse. with cracked tranmission cases due to excessive wheel hop at wop. newer bulletin out on this by the way. which is obvously not covered under warranty.

although when i read the bulletin i saw that gm says they will remedy this in the 2008 model year cobalts with stronger axles and stiffer transmission cases. not really relavent but thought that i would throw that in there. as there is no need for an entire thread on this. but still anyone who wants a bulletin# or more info can always pm me for anything related to gm.

 

Thanks for the info CHEV!!

Much appreciated!

 

Weird that it could be the belt, but anything's possible I suppose...if you're still having trouble when you get it back, have them check out the tensioner as well, just for ***** and giggles.

 

I'll do that, thanks bud.