Well my 07 ss/sc decided to go KABOOM at just over 70,000km (mods, GMstg 2, gmpp catback, injen intake, ZEX 1-step colder plugs ~10,000km on them, second set used)... the GM techs took a look and are arguing the spark plugs were not correctly torqued causing the motor to blow...
which I know is bullshit.
Anyways how can I go about fighting this? are there any links I could follow?
also I have never heard of a spark plug being the cause of a blown motor...

Any help is greatly appreciated.

Thanks boys (and girls)

 

You didn't list plugs in your mods list - are they the originals? If so then it's a factory issue anyway and you're still under warranty.

 

Updated.

 

I've heard of people over tighening plugs to where the piston will come up and smack them but i dont think it would of taken that long for it to happen. Im not even sure how close the piston is to the plugs to begin with in our motors. Im gonna say there trying to find away to f u

 

I have ALWAYS tourqed spark plugs to hand tight + 1/4 turn and have never once had a problem (I've changed EASILY 20 sets...)

and yes I realize they are trying to screw me over... which is why I am asking if anyone can think of a way I could fight this?

 

id ask to look at the motor youll know if it hit the plug but even its hard to say the plug was to far in. I had a rod break in a race motor before and the piston was missing the whole center section of it where it hit the valves and plug. Id want to see it though and make them prove me.

 

i ve read many posts about zex plugs and..... well blowing up

 

tell them they need proof that that is what caused it to blow.. there is something out tehre a rule that states they have to have 100% proof that caused it.. some 1 will chime in with whatever its called.

 

Magnuson Moss Warranty act.

 

If they still dick you around try calling the customer care 800 number

 

its canada. we don't have the magnuson act up here. and allan ya get them to show you the piston. and if i'm not mistaken if your spark plug was too loose it would have done other damage, not just kaboom. there would be a trial leading up to the kaboom if it was the plugs not torqued properly.

 

Should be some kind of indication on the piston of damage from the spark plug. Though honestly id think the computer would pick up on an issue from the spark plug long before the engine would blow.

 

I will ask to take a look at the car.

And as far as ZEX plugs are concerned... I know a lot of people who have used them without a problem, this is my second set in the car...

 

x2..

 

"not torqued properly" could mean too tight as well, which is most likely the case here.

 

read the thread again... hand tight + 1/4 turn...

 

so you think it was cause your spark plugs were too loose??

If spark plugs are the cause of an engine blowing chances are them being too tight not too loose.


What even happened? Explain how it went "kaboom"...

 

No I know for a fact it was not the spark plugs that caused it... the car is currently sitting at a local dealer and they are trying to deny warranty by saying "the spark plugs were not properly tourqed".

I do know there was a mis-fire, the CEL came on and began blinking, then went solid, car was fighting to stay on. Pulled into the nearest parking lot, and got a ride home to get my compression tester, cylinder #2... 0 pressure. Tow truck came, brought it to GM.

 

yea if your piston smacked the plug cause it was to tight its going to miss fire and have no compresion.

 

But if thats the case then the sparkplugs were too long and there'd be evidence on the piston of it hitting the spark plug.

 

You can't put different spark plugs in your car and expect to get warranty work. Those plugs probably caused the failure, no one has a stock motor that went "kaboom". It's no wonder why some dealerships hate customers. I'm tired of hearing people listing all their mods, saying their car is basically stock, and nothing they have done could possibly have any effect on part XYZ failing and then wanting the dealer to fix everything for free. It's cool if you mod your car, but if something breaks, then you need to pay to fix it.

 

Plugs are a wear item and therefore won't void the warranty according to the Magnuson Moss act UNLESS GM provides replacements free of charge (Which GM doesn't). By your post, our cars would fail warranty if we used anything other than Mobil 1 Synthetic (Such as Castrol Syntec or something).

 

What???

So lets see, if I put the biggest DOT slicks on my car and drive normally and an axle breaks or some other part wears out from the weight and grip of the tires, and because all I did was replace a wear item GM should fix it???

Your logic fails.

He put none stock plugs in his engine, if GM can prove they were the cause he is screwed. If he put stock replacement plugs in wrong and GM can prove it, he is screwed.


This site throws Magnuson Moss around like a 1 dollar *****.

 

The car has GMstg 2... nothing more, except a gmpp catback, ALL OF WHICH IS WARRANTIED... which in turn REQUIRES a 1-step colder plug to PROPERLY run the kit... that being said, the plugs will be swapped no matter what (if the owner isnt completely daft)... if GM plans on voiding warranty because a 1-step colder plug was put in they should SUPPLY a set of one step colder plugs with the kit, OR have a list of plugs they will accept.

I am tired of STUPID people like yourself who are to ignorant to think outside of the box to such a matter that I just addressed, and just follow along with what GM says... this car was not modded outside of warranty.

Use your noggin...


and for the record, this is my dads car (bought it from me as he became very attached to it ) and he refused to listen to my advice, therefore paid for a new motor... Oh well, not my cash.

as for you, please read my above argument about the plugs

 

Doesn't the Injen intake void warranty? I have one, and I will be sure to put my stock one back on when I take my car in to install Stage 2. I've heard about the car needing 93 octane for Stage 2, but not one step colder plugs. Can anyone else confirm this about the plugs?