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Old 12-04-2021, 11:10 PM   #1
RalphM
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Default Head damage, possible causes?

This is the passenger side head off of the industrial engine I have. Severe damage on the casting, but absolutely no damage to the cylinder or the piston. Just trying to figure out what happened here?
A machinist friend of mine said it could’ve been a flaw in the casting, but I don’t see how it could’ve ran for years if it was a flaw.
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Old 12-04-2021, 11:12 PM   #2
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Default Re: Head damage, possible causes?

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This is the passenger side head off of the industrial engine I have. Severe damage on the casting, but absolutely no damage to the cylinder or the piston. Just trying to figure out what happened here?
A machinist friend of mine said it could’ve been a flaw in the casting, but I don’t see how it could’ve ran for years if it was a flaw.


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Old 12-04-2021, 11:14 PM   #3
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Default Re: Head damage, possible causes?

Hydrolock?
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Old 12-04-2021, 11:26 PM   #4
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Default Re: Head damage, possible causes?

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Hydrolock?

Ice?
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Old 12-04-2021, 11:43 PM   #5
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Default Re: Head damage, possible causes?

Compression vs. head and compression won.
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Old 12-04-2021, 11:51 PM   #6
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Maybe water in cyl, but up here if it was water it would have frozen in cyl and caused damage. I’ll have to pull the pan and check that rod. #6 I believe. Seems it would have bent that one.
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Old 12-05-2021, 12:15 AM   #7
38 coupe
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Default Re: Head damage, possible causes?

Given the rust and crust in the rest of the engine it will need to come apart anyway. I would very carefully inspect the cylinder bore, rod, and piston for that hole.
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Old 12-05-2021, 07:18 AM   #8
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Default Re: Head damage, possible causes?

I’ve seen that in old engines left out to the weather It broke at the weakest point, might have cylinder wall cracks as well.
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Old 12-05-2021, 08:47 AM   #9
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Default Re: Head damage, possible causes?

Rust or weak casiting in combustion chamber or a combination and the compression finally caused it to give way.
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