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Old 10-25-2019, 04:12 PM   #11
Werner
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Join Date: Jan 2019
Location: Germany, near Aachen
Posts: 1,159
Default Re: Number 8 Exhaust Valve sticking

Incidentally, this is a disadvantage of unleaded gasoline. Each outlet valve shaft moves in the so-called "mixed friction area". The lubrication of these valve guides allows only lead, no oil survives these extreme temperatures!
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Ford Model A, Roadster, 1928
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