Hi Alan,

I had that issue last summer. Suspected both the heat exchanger and the hot
water tank. So I disconnected the coolant hoses from the hot water tank and
just connected them together (thereby just by-passing the HW tank).

Then I replaced the seals on the heat exchanger, which definitely needed
replacing!  That solved the problem.

I'll try re-connecting the HW tank this week to see if problem returns.  If
it does, then HW is also the culprit.

Mike
Atacama 33 mkii
Toronto

On Mon, Jun 8, 2020, 12:03 PM ALAN BERGEN via CnC-List <
cnc-list@cnc-list.com wrote:

> Water in my heat exchanger keeps disappearing, very slowly, even when the
> engine hasn't been running for weeks at a time.  There is no evidence of
> water under the engine. Hot water heater is only a few years old. Could the
> heat exchanger be leaking into the raw water side of the cooling system?
> Anyone else have this problem? What's the best way to search for the leak?
>
> Alan Bergen
> 35 Mk III Thirsty
> Rose City YC
> Portland, OR
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