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02-23-2009, 03:16 PM
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Hummer Veteran
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Join Date: Nov 2006
Posts: 172
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Re: head replaced SECOND TIME
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Originally Posted by Huck BB62
Perhaps the ninnies should learn how to do a proper root cause analysis? I'm thinkin' it's NOT the heads that are the problems but something else? There's too many high mileage H3s like mine that are getting HAMMERED with no problems. It's not a head design issue in my opinion. I've got 53k (yeah, not much by some folks standards) on our '06 3.5 and believe me, half it's life is spent at full throttle (poor thing needs a little less ass or a little more grunt). No engine problems as of yet.
Neat thing about the little 3.5 is that driven properly, I can exceed 19mpg. But, driven hard, I only get a little over 15. It does indeed reward a patient foot!
Now, if I could just get a set of BFG ATs to last more than 25k!!!!...  |
Are you a technician? You obviously have never diagnosed or repaired one of these cylinder head problems. The problem is in the valve seats. The intake valves don't seal because the valve seats deteriorate. The updated heads have inserts in the seats. I've replaced probably 400 of these things and only had 1 of the updated heads come back needing another head. The reason yours hasn't had a problem is because you've driven it hard. We've never replaced one on a rental car because we all know how people drive a rental.
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02-23-2009, 04:49 PM
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Hummer Guru
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Join Date: Jul 2006
Location: Stouts Creek
Posts: 4,192
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Re: head replaced SECOND TIME
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Originally Posted by pdsq99f4
The problem is in the valve seats. The intake valves don't seal because the valve seats deteriorate. The updated heads have inserts in the seats. I've replaced probably 400 of these things and only had 1 of the updated heads come back needing another head. The reason yours hasn't had a problem is because you've driven it hard. We've never replaced one on a rental car because we all know how people drive a rental.
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Wasn't this problem addressed and solved at the manufacturing plant in NY after it was identified in early builds and early 2006?
Most of the early problems with this have been shaken out, no? 
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02-24-2009, 07:20 PM
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Hummer Veteran
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Join Date: Nov 2006
Posts: 172
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Re: head replaced SECOND TIME
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Originally Posted by wpage
Wasn't this problem addressed and solved at the manufacturing plant in NY after it was identified in early builds and early 2006?
Most of the early problems with this have been shaken out, no? |
Yea, but they sold a lot of them before the new heads came out. The new head didn't come out until like 7 months after the vehicle was released. |
02-24-2009, 08:16 PM
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Hummer Guru
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Join Date: Jul 2006
Location: Stouts Creek
Posts: 4,192
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Re: head replaced SECOND TIME
H3's that were produced after 8-15-05 had the fix 
__________________
"For God so loved the world he gave his only son that whoever believe in him would not perish but have everlasting life. "
(John 3:16)
2006 H3 Slate Blue,Header,Jacked,CAI,Toyo35's,HHO.
Priors...
Explorer
Commander
71 Vette
You Name it!
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02-25-2009, 04:26 PM
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Hummer Veteran
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Join Date: Nov 2006
Posts: 172
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Re: head replaced SECOND TIME
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Originally Posted by wpage
H3's that were produced after 8-15-05 had the fix |
Actually it was 4-4-06 |
02-25-2009, 05:03 PM
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Hummer Professional
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Join Date: Oct 2005
Location: Maple Valley,Wa
Posts: 339
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Re: head replaced SECOND TIME
We had to replace the head on our 2007 H3 2 months ago... So I call shenanigans on the engine fix dates.
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02-25-2009, 08:25 PM
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Hummer Veteran
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Join Date: Nov 2006
Posts: 172
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Re: head replaced SECOND TIME
The 07 is a whole different head than the 06's. There have been a few 07's, but not like the early 06's. I've personally replaced less than 10 heads on 07's.
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02-24-2009, 10:41 PM
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Hummer Novice
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Join Date: Feb 2009
Location: Poland, ME
Posts: 16
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Re: head replaced SECOND TIME
update~ still no check engine light, but took to dealer this morning. Got a call back that the Manifold bolts were broke, and they had to order parts, will keep it over night. On my way over now to pick up rental. Dealer says its not the head, but symptoms point that way. Will advise more tomorrow...
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02-25-2009, 02:54 AM
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Hummer Guru
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Join Date: Dec 2005
Location: In a FREE U.S.A. where Marxism, Socialism & Communism is not allowed !
Posts: 5,485
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Re: head replaced SECOND TIME
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Originally Posted by Keepa2
update~ still no check engine light, but took to dealer this morning. Got a call back that the Manifold bolts were broke, and they had to order parts, will keep it over night. On my way over now to pick up rental. Dealer says its not the head, but symptoms point that way. Will advise more tomorrow...
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intake or exhaust ?
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02-25-2009, 02:11 PM
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Hummer Novice
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Join Date: Feb 2009
Location: Poland, ME
Posts: 16
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Re: head replaced SECOND TIME
exhaust~
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