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Old 06-10-2019, 08:47 PM   #1
chrs1961815
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Default Chipped Head

So I acquired a lot of model a parts and I got two heads, a really nice one and a rusty one with a dead mouse inside. So while blasting the heads today, I noticed the rusty one had a piece of the casting missing around one of the spark plug holes. The question in my mind is if this is fixable and worth fixing. The cylinders are also badly pitted.
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Old 06-10-2019, 08:51 PM   #2
Joe K
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Default Re: Chipped Head

If there are four full threads, then strength is equal to the maximum capability of the thread.

I would say use it.

Helicoil does have inserts you can use to repair the threads. This will bring the anchorage back to "solid ground" if you need it - but I don't think you need it.

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Old 06-10-2019, 09:32 PM   #3
J Franklin
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Default Re: Chipped Head

If the plug doesn't seal you will be disappointed.
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