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2004 chevy trailblazer_lt
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Discussion Starter #1
Can the 07 head be put on an 04 engine??? i know there is people talking about swapping to the 06 head but is there any difference that will not allow an 07 head to work on the 04 engine? also what all parts are needed to complete the swap?
 

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non_gmt360 other
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821 Posts
Can the 07 head be put on an 04 engine??? i know there is people talking about swapping to the 06 head but is there any difference that will not allow an 07 head to work on the 04 engine? also what all parts are needed to complete the swap?
The 07 head is carry over from 06. I don't know of any differences that would prevent you from doing this. Only complication that I forsee is that GM uses torque-to-yield fasteners, so, you'd probably have to stock up on dealer stuff.
 

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2005 gmc envoy_sle_xuv
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I'm sure it is easily possible, but to see the gains wouldn't you need MAF/PCM/ETC along with the swap... I am sure you will have no problem with it, but it seems pricey if you are doing this just for the turbo route... it seems like there should be an easier way to get around this...
 

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2002 olds bravada
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I too am interested in knowing if there is merit to swap a head from an '06 up model. I would think that mechanically there would be no limitation and the older PCM likely should be able to handle it. My guess is that some substantial tuning would be required for the different cams and port sizes. Certainly, would like to know if someone has looked into this. My reference from the SBC is that this is type of swap would not be complicated but by comparison almost everything performance-wise about the 4.2 is.
 

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non_gmt360 other
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I would be hard to justify a 06+ head swap unless you need a head anyway or plan on swapping over the PCM too.

Figure $500 for the head, probably a couple hundred in gaskets and fasteners. At best, you're looking at a 15hp gain, probably less without the PCM. For $700, I'd probably start with tune, catback, and custom header. But, I think McKinley is thinking turbo, so...

Might be cheaper/easier to swap the entire engine and then sell your core.
 

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2002 chevy trailblazer_ltz
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Figure $500 for the head.....

Might be cheaper/easier to swap the entire engine and then sell your core.
The BARE cylinder head is $500....add machine work, 24 valves, keepers, locks, gaskets, etc, etc........:eek:
 

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non_gmt360 other
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The BARE cylinder head is $500....add machine work, 24 valves, keepers, locks, gaskets, etc, etc........:eek:
I was thinking pull-off, but good point. Just checked car-part.com. Heads are going for $250, engines as cheap as $600. I'd go with the engine swap. Save a lot of hassle. Plus you get better rings and piston squirters. :woot:
 

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2004 chevy trailblazer_lt
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Discussion Starter #8
yah...i'm working on a turbo set up right now... we have the p10 idling with a two bar map sensor in it and a prototype two bar tune... the transition coming off idle is smooth too but we are running into some excess fuel once it trys to rev...we are working more on the tables as i speak so we'll see what it does...
 
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