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Discussion Starter #1
Finally got my gen 4 to my garage, started tearing it apart to fit the 5sfe bracketry onto the new motor. After a couple minutes looking around the engine I noticed there were a couple exhaust manifold nuts and bolts not there. So I take the exhaust manifold off to see why, got it off and found this..... it looks like someone air hammered the **** out of the head also could be due to torching and the aluminum melting. My main concern is if they used an air hammer is cracking throughout the head, no. 2 concern is not having a exhaust manifold that seals properly to the head. So what could I possibly due to solve this problem??? Any ideas or solutions are greatly appreciated. Bought the engine from jdm engine expo in queens village NY
 

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That looks like a bit more than a stud snapping though... I mean there are clear marks like someone was banging on it. I have no idea why someone would do that for either removing or repairing so I'm a bit confused. If the stud was simply snapped, sure no biggie, but wtf even happened there.
 

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Maybe the stud snapped and they tried to wrench it out or something, then gave up and just sent it.

Drill and tap the hole with a helicoil, pretty easy repair since you can be a little off and still pick up fresh material with the larger helicoil tap.
 

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I’d be worried a bit about what looks like mushrooming around that hole. Is it even flush with the rest of the block?
 

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You'll want to bring this to a machine shop to repair that. The same exact same thing happened to me years ago, had to get it welded, drilled, and tapped.
 

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Discussion Starter #8
I’d be worried a bit about what looks like mushrooming around that hole. Is it even flush with the rest of the block?
It is not flush with the rest, it recedes about half an inch past the rest of the deck.
You'll want to bring this to a machine shop to repair that. The same exact same thing happened to me years ago, had to get it welded, drilled, and tapped.
Awesome thanks for the help man
 

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All hope is not lost. Have it drilled welded and then put in a time cert. Helicoils are marginal at best and you may have to relive that repair again.
 
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