Re: Hardened Intake Valves & Seats


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Posted by Vaughn [172.68.141.253] on Friday, April 21, 2017 at 21:46:23 :

In Reply to: Re: Hardened Intake Valves & Seats posted by Matt Wilson [173.245.50.165] on Friday, April 21, 2017 at 12:50:14 :

Lead in gasoline had a lubricating effect on valve seats, when it was taken out, everyone thought inserts had to be installed, which doesn't seem to be the case. There might be comparisons on the internet that present some insight and maybe it matters after 60 - 75,000 miles, who knows. If any gets to that many miles on unleaded or ethanol mix running a 230, let us know the out come.



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