post head replacment - Hummer Forums by Elcova

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post head replacment

03-13-2007, 11:15 PM

pdsq99f4

Hummer Veteran

Join Date: Nov 2006

Posts: 172

Re: post head replacment

Boomer: where are you located? Any head replaced after april of 06 is the new style. I personally haven't seen any problems with the new style heads. I have seen a couple of vehicles with a slightly rough idle with no misfires though. I personally think it is due to the 600 rpm idle on a 5 cylinder engine. If the idle was even 50-75rpms more the rough idle would go away. just my two cents.

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