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Old 11-27-2020, 12:53 PM   #21
topfuel724
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Default Re: Offenhauser 400 Heads Value

I recently had a stock head re-domed. It's hard to fine a shop that has the tooling and the knowledge to do it today.
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Old 11-27-2020, 12:57 PM   #22
Ironrod
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Default Re: Offenhauser 400 Heads Value

Thanks Tubman, I was hoping you would respond. I will now make sure to chase all threaded holes and verify they pass. Also will measure chambers and level with a straight edge as advised.
Thanks
Bob
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Old 11-27-2020, 01:02 PM   #23
tubman
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Default Re: Offenhauser 400 Heads Value

If possible, use an actual thread chaser, not a tap.
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Old 11-27-2020, 01:51 PM   #24
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Default Re: Offenhauser 400 Heads Value

I understand about the tread chaser, I have overhauled aluminum marine engines. Aluminum treads can be a challenge. I have never worked on these type of heads and am very concerned about the alloy.
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Old 11-27-2020, 08:20 PM   #25
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Default Re: Offenhauser 400 Heads Value

Re-doming and Milling for .045/,050 piston to head clearance and your good to go. Also I heard that painting them with Latex paint will prevent erosion, can't hurt, worth a try.
Gramps
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