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Discussion Starter #1
My machine shop reached out to me and told me That as he’s working on the block he noticed that one of the stud holes has a stress crack going into the water jacket.

I need some honest opinion from people with knowledge

What can be done ?
Is it Ok to keep and use this block as is ?

Is there something I can do ?


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Anyway you can post a picture of it???? Would likely go along way in getting someone to comment on it....
 

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Discussion Starter #3
Ok. I’m back and I got some pictures. Let me know what you guys think

Go - No Go

Goal with this engine would be 20-25 psi
everything in the engine it’s new for the exception of the crankshaft and valves






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How are the water jackets (the hot dog looking ports)? Those are more likely to fail.
 

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I've ran several 7M blocks with similar cracks into the head stud holes, one of which I ran at about 400whp for ~25k miles. I ran ARP head studs, and I torqued the bare stud itself into that hole to about 10 ft-lbs just to ensure it wouldn't back out. Then I marked the top of the stud and the nut once the head was torqued down so that I could visually check and make sure the stud and nut didn't back out or loosen up at all any time I had the valve covers off. Other stuff killed that engine before the crack became a problem.
 
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