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Discussion Starter #3
Truck currently has a 6.0 swapped into it but might possibly have cracked a head or block and if i am going to be pulling the motor was looking to see what it would take to put a 6.2 in
 

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Some dude on the internet
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If you’re dead set on a 6.2 then just stick with a gen 3 6.0 and punch it out to 4.065. 6.2 blocks are gen 4 and will require lots of integration since they require gen 4 sensor placement (knock sensors, AFM oil towers, cam sensor, etc). If it’s a gen 5, then you’re in for a shit ton more work.

Or just get another 6.0, leave it alone and drop it in and call it a day. In my opinion dropping in a 6.2 isn’t worth the effort unless you’re into it for a pet project and love throwing money at it.
 

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Discussion Starter #5
Yeah i have spent the night going thru post and seems keeping my truck 6.0 swapped will be the way to go seems the 6.2 is no where a direct swap or cheap and the gains are not worth it
 

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If it has castech heads just throw a different set of heads on it and run it.. don't drop a new motor in it just cause the heads are cracked..

And I don't think I've ever seen a 6.0 block just crack
 

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If your heads are cracked there's a very good chance your block is Warped. You might get lucky and I might not be. Then again it could just be a simple thermostat failure. They don't make them like they used to

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My bet is the heads are castech and they are cracked in the usually places. Blocks most likely fine, I haven't seen blocks warp from a cracked castech head...

Also why are there two different threads for this issue
 

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Discussion Starter #9
I did see gm had a service bulletin on the castech heads while doing some research last night i dont happen to remember the markings inside the head from when i just had it apart ia there a way to tell from the outside?
 

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Discussion Starter #12
There are two different threads cause they are two very differnt questions requesting two very different sets of information
 

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x3 shitbox owner
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Thought if it was a 6.0 it would have 317s?


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Discussion Starter #16
As far as i know they are the stock heads from the 6.0 it had less then 80k on it when i got the motor and i never swapped the heads
 

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x3 shitbox owner
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Still wouldn’t hurt to verify the casting number on them.


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Some dude on the internet
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Pretty much, and that’s likely what you have. Let’s take a step back first. What is making you think you have a cracked head or block? Other than visual confirmation, that will be kinda hard to tell. Is it overheating or what?
 
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