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Old 08-01-2015, 08:36 PM   #10
Shadetree
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Join Date: May 2010
Location: Cottageville, WV
Posts: 1,535
Default Re: Flathead Longevity

The only weakness I know that the flathead has is overheating. I ruined a perfect `40 engine back in the mid 50's. A careless teenager didn't see the heat gauge in time.

I have heard you can run the engine wide open without a load and the valves will float before it comes apart.
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