Repairable head? Crack between coolant passages

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Jan 21, 2019 | 11:05 AM

eh2_Trav

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From: Bend,OR

Repairable head? Crack between coolant passages

I pulled this gsr head from a swap I purchased and noticed that is a hairline crack between two coolant passages. It was assembled by a shop so I’m surprised (kinda) that they didn’t tell the guy his head was cracked. Long story short is the head repairable or do I really need to worry about it. I was thinking the repair would be easy to drop a few beads across the crack then get the head milled. I don’t think the hairline crack would really matter and unless you overheat the head it shouldn’t get worse but that’s a complete guess. I never ran a head with a hairline crack like that. Curious to see if anyone ever ran a head with a small crack like this. Thanks for any suggestions or advice.

Jan 21, 2019 | 10:24 PM

TomCat39

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Re: Repairable head? Crack between coolant passages

I'm no pro but my logic seems to fit yours.

Knowing me, If the head was flat, I would just run it.
The crack can't grow into any critical areas as far as I can tell.
Will just open up the passage more to the water jacket is my thinking.

But, once again, I'm no pro, so could be horribly mistaken.

Jan 21, 2019 | 10:33 PM

Caoboy

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Re: Repairable head? Crack between coolant passages

Talk to an automotive machine shop and see what they think. I would say it's easily repaired.

Whoever decked the head the last time did a shitty job and needs to change their tooling. Looks like they ran a grinder over it to clean it up.