Bad head

[1_maniac]

I'm told you should be able to tell the H3's that were prone to bad heads
by where the "GM" emblem is located ... The H3's having the GM logo behind
the H3 logo on the door were early production models, and were having to
have the heads replaced ... Later models have it on the fenders ... This is
not an absolute, but something to watch for

[f5fstop]

Originally Posted by 1_maniac

I'm told you should be able to tell the H3's that were prone to bad heads
by where the "GM" emblem is located ... The H3's having the GM logo behind
the H3 logo on the door were early production models, and were having to
have the heads replaced ... Later models have it on the fenders ... This is
not an absolute, but something to watch for

Yes, it is lame, because it is incorrect. For 06 models, the GM logo is next to the H3 emblem. For 07 models, the logo is move to the rear of the front fender.
NOT ALL 06 models have this problem, in fact, engines built after March 31, will not have this problem, unless a one out of a million. Those engines built before March 31 could have this problem, but are not guaranteed to have the problem.

[Icyelle]

Is there a Vin# cut-off on this problem?
I bought my H3 in November 06 and it has around 14k on it to this date, but I haven't had any rough idling or engine light coming on.

Are they not doing a recall?

[HummerLite]

Gee,
40,000 miles got mine in Aug 05, Engine light came on, Checked codes found misfire cylinder 4, Replaced ignition coil..... Fixed 2 months later engine light again ( got worried again ) Checked codes again found random misfire ( Oh no could be the big one ) Nope cleaned fuel injectors...... FIXED , Btw i'm a tech at a GM dealership..... Buick, Ponitac, And GMC.....no Hummer
Will I have problems with the head? time will tell.
LOL

[DDWH]

mis-leading thread title!!!!!

teeth marks or something?

[h2co-pilot]

Originally Posted by DDWH

mis-leading thread title!!!!!

No kidding.

[HoosierH3]

Originally Posted by HummerLite

Gee,
40,000 miles got mine in Aug 05, Engine light came on, Checked codes found misfire cylinder 4, Replaced ignition coil..... Fixed 2 months later engine light again ( got worried again ) Checked codes again found random misfire ( Oh no could be the big one ) Nope cleaned fuel injectors...... FIXED , Btw i'm a tech at a GM dealership..... Buick, Ponitac, And GMC.....no Hummer
Will I have problems with the head? time will tell.
LOL

So there is no way to know what batch has the problematic head/valves??? No way of knowing when GM caught this and corrected it? I too have an earlier 06 that I wonder about, but the service department says not to worry, unitl it happens anyway.

[evldave]

Originally Posted by HoosierH3

So there is no way to know what batch has the problematic head/valves??? No way of knowing when GM caught this and corrected it? I too have an earlier 06 that I wonder about, but the service department says not to worry, unitl it happens anyway.

Read F5's comments above. March 31 cutoff date for the new head design. And I'd say we've seen maybe <100 of these here. There were what maybe 20-30k hummers sold before then (including mine). Chances are small (unless it happens to you in which case they aren't).

Do I worry? Sure, I'm concerned it's gonna go, but realistically if it goes, I call hummer customer service have it towed to the closest dealer, get a rental, have it fixed, call GM get my drivetrain warranty extended to 100k, have a new head, a longer warranty, and get to beat the **** out of a rental car for free!!

[HummBebe]

Originally Posted by evldave

Do I worry? Sure, I'm concerned it's gonna go, but realistically if it goes, I call hummer customer service have it towed to the closest dealer, get a rental, have it fixed, call GM get my drivetrain warranty extended to 100k, have a new head, a longer warranty, and get to beat the **** out of a rental car for free!!

[HoosierH3]

Originally Posted by evldave

Read F5's comments above. March 31 cutoff date for the new head design. And I'd say we've seen maybe <100 of these here. There were what maybe 20-30k hummers sold before then (including mine). Chances are small (unless it happens to you in which case they aren't).

oops! my bad! March 31-that's what I get for paying attention!

[Av1ator]

The extended warrenty I got from GM after I had the head replaced TWICE was only for the engine NOT the entire drivetrain. I asked for them to include the entire drivetrain but they would not do it.

[mln2963]

I got the H3 back on Saturday (sooner than promised) and it immediately ran a little hotter than before the head replacement (just above the half way mark instead of just below). Took it back into the dealer this morning, they hooked it up and no codes showed up. The service guy said the new heads are prone to do that and not to worry unless it runs in the red. It's good to have it back and I hope it's a long time before I see the dealership again.

[ChevyHighPerformance]

Originally Posted by HummerLite

Gee,
40,000 miles got mine in Aug 05, Engine light came on, Checked codes found misfire cylinder 4, Replaced ignition coil..... Fixed 2 months later engine light again ( got worried again ) Checked codes again found random misfire ( Oh no could be the big one ) Nope cleaned fuel injectors...... FIXED , Btw i'm a tech at a GM dealership..... Buick, Ponitac, And GMC.....no Hummer
Will I have problems with the head? time will tell.
LOL

I wonder how many good heads were unnecessarily changed?