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posted to rec.boats
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First recorded activity by BoatBanter: May 2007
Posts: 2,587
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Winterizing & thermostat questions
On Wed, 06 Jan 2010 15:00:27 -0500, wrote:
I
left the cock open until antifreeze started coming out of it,
then closed it and continued filling with pure antifreeze until
it came to the top of the thermostat opening. That should mix
with whatever little water is left and keep the motor safe from
freezing at least down to zero degrees, right?
You do realize that pure glycol freezes at eight above? Not being
water it doesn't expand and won't break your block. However, If you
start it while frozen you will fry the motor. Of course, 90% freezes
at about 90 below. I would use pure methanol, much cheaper, but
whatever. My race car burns the stuff, so I have five gallon jugs of
the stuff lying around. The people with the alcohol truck also have an
alcohol pump at the station. You can rinse your motor and drain it out
and let it evaporate. I have a glycol cooled motor and it is good to
go at all times, same as a car.
Casady
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