First Run - Flathead

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10-24-2011, 12:27 PM

john fin

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First Run - Flathead

I have seen people run their flatheads (youtube) for 5 minutes or so without a cooling system. Is this a bad thing to do or can you do it for short periods of time.
Flathead Engine Test Run - YouTube
Flathead running - YouTube

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10-24-2011, 02:48 PM

tinman52

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I personally won't do it. My machinist friend told me hot spots can develop on the cylinder walls in seconds. Why risk a new and expensive engine? How much harder is it to hook up the rad? At least fill the motor with water.......JMO

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