BoatBanter.com - View Single Post - Hot water tanks

wrote:
I have a generic concern about water heaters that use engine coolant as
the heat source: a pinhole leak in the heat-exchanger tubing inside
the water heater would permit coolant to mix into the hot water, and
you might not know it until the leak became severe. Ethyl glycol is not
my favorite intoxicant!

Anyone aware of any instances of this (presumably, there would be a
lawsuit)? Are my fears unfounded?

Capt Ron

Of course for any coolant to flow into the water system, the pressure
difference would have to be in the right direction... what is the
pressure in your engine coolant loop (hint: see your radiator cap), and
what is the pressure in your water system?

bob
s/v Eolian