Posted by wisbaker on April 11, 2012 at 10:21:01 from (207.118.181.99):
In Reply to: Valve Seats posted by Sam from WA on April 11, 2012 at 09:17:27:
Am I missing something here? Most of the really old tractors were designed to run on distillate also known as tractor fuel. My understanding is it is almost like kerosene. Would that not be lead free? Did distillate heads on our letter series John Deeres and Farmalls have hardened valve seats? Whats the story? Was this a conspiracy between the lead and automotive industries to put lead in our gas and poison or air and water? Leaded gas has not been generally available for 20 years here, why aren't we hearing stories about massive failure of valve seats in our internal combustion engines?
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