Hello... It's all Viet Nam Vette's fault...

[f5fstop]

Originally Posted by Viet Nam Vette

Heh Mac....I'm sorry I had a brain Fart on this Cyl head thing.. But I'm sure some one will jump in here and square this away. Not sure if it was a recall or a wait till the head goes thing then GM will replace it or not answer.

So sit tight and one of the Hummer Rock Jumper's will chime in..

No cylinder head recall. Believe it or not, it does not happen to every engine out there.

It also depends on the VIN of your vehicle. If manufactured prior to 287591 (Last six digits of the VIN) you could have the problem. So, if your VIN is after the VIN, then you have the new hardened head. If not, and you develope the problem, you will experience a rougher than normal idle, and then the service engine soon light will come on. Dealer will retrieve a P300 code, check compression, and if low, replace the cylinder head. (The I-5 engine already idles rougher than a V-block engine, so don't get alarmed if you feel a slight idle vibration.) I should also mention, that if it does happen, call Onstar and they will tell you to get to a dealer as soon as possible. However, if you happen to be out climbing rocks, running rivers, etc., don't fret. You can drive quite a few miles with this condition. Only harm that will happen is the valve guide that failed, will elongate more, causing more damage to the head. A few other valves might start to elongate, but no damage to the engine itself. The fix is a complete new designed hardened head, so don't worry about causing more damage to the head.

[Viet Nam Vette]

Originally Posted by f5fstop

No cylinder head recall. Believe it or not, it does not happen to every engine out there.

It also depends on the VIN of your vehicle. If manufactured prior to 287591 (Last six digits of the VIN) you could have the problem. So, if your VIN is after the VIN, then you have the new hardened head. If not, and you develope the problem, you will experience a rougher than normal idle, and then the service engine soon light will come on. Dealer will retrieve a P300 code, check compression, and if low, replace the cylinder head. (The I-5 engine already idles rougher than a V-block engine, so don't get alarmed if you feel a slight idle vibration.) I should also mention, that if it does happen, call Onstar and they will tell you to get to a dealer as soon as possible. However, if you happen to be out climbing rocks, running rivers, etc., don't fret. You can drive quite a few miles with this condition. Only harm that will happen is the valve guide that failed, will elongate more, causing more damage to the head. A few other valves might start to elongate, but no damage to the engine itself. The fix is a complete new designed hardened head, so don't worry about causing more damage to the head.

There yah go MAC..Right fron the Engineers Keyboard..

Thanks For that info F5..

[-=Mac=-]

Originally Posted by Viet Nam Vette

There yah go MAC..Right fron the Engineers Keyboard..

Thanks For that info F5..

Great news. I'll grab my papers and figure out if my VIN is in the danger zone. Thanks F5!

-Mac

[-=Mac=-]

Since collecting the new beastie, the kids have refused to ride in my wife's grocery getter. It's all good. Oops! Almost time to go collect my son from his high school extra-curricular activities.

-Mac

ps: The previous owner stuck what looks like a polished stainless muffler & tailpipes under my H3 as well as a K&N filter and custom 'open' airbox. I presume he/she was hoping for a bit of extra highway grunt. A less restrictive exhaust system should boost my MPG but I'm not sure about the K&N. Thoughts?

[HummBebe]

It won't hurt, probably gained 5HP

[nychot]

Originally Posted by Viet Nam Vette

There yah go MAC..Right fron the Engineers Keyboard..

Thanks For that info F5..

does the head issue involve '06 and '07 h3s?

[deserth3]

Welcome to the board Mac. My H3 is at the dealer for a new head right now. I was in Edmonton Canada last month when my check engine light came on. The code onstar showed was loose fuel cap, change in fuel, ect.
So I kept driving.
2000 miles later dealer finds the P300 code and it's been over 1000 miles since I saw a check engine light. So I wouldn't worry about it too much.
The code also didn't show up in the onstar diagnostic email I recieved the day before the dealer found the code.

[KenP]

Gawd. Another Mac.

[-=Mac=-]

Originally Posted by KenP

Gawd. Another Mac.

I promise I'm not the previous MAC... Being a Canadian, I'll be polite and well mannered... but the twisted sense of humour and the occasional English spelling of words like "humour" are also part of the package.

-Mac

[HummBebe]

SWEET!!!

an non-troll new member.

[H3PAC]

Welcome Mac! The RCMP kicks butt. So do people up your way really call each other nobs and hosers? Or do I watch to many old McKenzie Brothers movies? Nice to have you with us, eh?

[-=Mac=-]

Originally Posted by H3PAC

So do people up your way really call each other nobs and hosers? Or do I watch to many old McKenzie Brothers movies?

Some of us who lived through the SCTV years still call each other hosers but it's not fashionable anymore... but everyone still finished their sentences with "eh?" so Bob and Doug will never be forgotten.

Thanks for the warm welcome, folks!

-Mac

[KenP]

Originally Posted by -=Mac=-

Being a Canadian, I'll be polite and well mannered
-Mac

If you only knew how wrong that statement actually sounds to some of us.




Inside joke...

[lennyrebel]

Hello Mac welcome to the club. I'm sure you'll love your Hummer. I.m also a Canadian but way down at the bottom near Windsor Ont. Regards The Rebel