Mark, your machinist is correct. Our machine shop does several hundred
heads a year, including about 100 each year for us (MG, TR3 - TR8,
Healey, etc.) With this kind of statistical universe, we see very
little recession. Occasionally yes, but in the minority. We always use
stainless exhaust valves on all heads except TR7 and TR8 - they were
already fully no-lead compatible. Ted
Mark Eginton wrote:
> As an old car buff for too many years, I can't say I have ever lost a
> valve to unleaded gas. From flatheads through muscle cars including
> vintage motorcycles and 40 years of driving this Triumph. I thought I
> would be safe on this engine and go ahead and do the valve seats when
> an old machinist I like to use told me its all a myth and that he has
> never seen valve seat damage either. "I'll be glad to take you money..."
>
> Just thought I would ping the list before closing on this decision.
>
> Best,
>
> M
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