Darn... Bronze is what I meant. Getting late.
--Tom
Thomas Walter wrote:
> Soft bonze was originally used.
>
> If you are having the head reworked, cheap insurance
> to have the exhaust valve seats replaced with Stellite,
> or another modern material (Stellite has been around
> since the 1930's!)
>
> Cheers,
>
> Tom Walter
> Austin, TX
>
> Roadster wrote:
>
>
>>Howdy All!
>>
>>Are the original valve seats in a U20 hardened? Or, do they need to be
>>replaced to run unleaded gas?
>>
>>--
>>Best regards,
>>
>>Fred Schroeder
>>'70 2000
>>SRL311-13359
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