A couple of months ago I had an issue with my Westerbeke's expansion tank filling to the brim. I then replaced the 14 year old heat exchanger
believing there was an internal leak with raw water
leaking into the coolant
circuit (when the engine
was at operating temperature).
That didn't solve the expansion tank from filling. The only other area that raw and coolant
comes into close contact was the hot water
heater. Since the Force heater was 14 yrs old I replaced it, too. That solved
I never noticed the hot water
having any sign of antifreeze
in it when washing
but advise not making tea with it!