I never pumped antifreeze through the seawater side of my 2gm20f, and did not have a problem in 10 yrs of Toronto winters. I did drain the seawater side by disconnecting the lower water pump hose, and draining the seawater strainer and muffler.
Dave Sent from my iPhone > On Nov 20, 2024, at 5:44 AM, Paul Hood via CnC-List <cnc-list@cnc-list.com> > wrote: > > > I can’t answer your question, but I also thought about that recently and I > realized that antifreeze is running around the head. While the block is > cold, the thermostat is closed, directing the antifreeze around the head. > Never had a problem but was curious about the water that might be remaining > in there. > > Paul Hood > REFUGE – 1981 C&C34 on Georgian Bay /) > > From: David Knecht via CnC-List <cnc-list@cnc-list.com> > Sent: November 20, 2024 8:33 AM > To: CnC CnC discussion list <CnC-List@cnc-list.com> > Cc: David Knecht <davidakne...@gmail.com> > Subject: Stus-List Winterizing the engine > > After winterized my boat I got to thinking about the process of pumping > antifreeze through the engine and water tank system. Some people winterize > their house water system by blowing all the water out of the lines instead of > pumping in antifreeze. If you did the same with the seawater side of the > engine by simple running the engine until nothing came out of the exhaust > hose, wouldn't that work to protect the engine from freezing over the winter? > That might be a problem running a standard impeller in the water pump dry, > but with a run-dry impeller, I don't see why it wouldn't work. Dave > > S/V Aries > 1990 C&C 34+ > New London, CT > > > > Your contributions help pay the fees associated with this list and help to > keep it active. Please help by making a small contribution using PayPal at: > https://www.paypal.com/paypalme/stumurray All contributions are greatly > appreciated.
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