Loss of coolant can sometimes be attributed to a failing head gasket. Look for milky engine oil, or evidence of the relieving through the coolant reservoir, and inspect the head gasket externally.
If the gasket is failing, allowing coolant into the cylinder, then when the engine is running, it pressurizes the coolant and exhaust gas bubbles out via the coolant tank. only a small amount of coolant will go into the cylinder when the engine is not running. Plug the open overflow tube with tape and see if it gets blown off. You can get test kits to see if the coolant is contaminated by exhaust gas. If coolant is leaking into the oil sump, then the oil turns milky. Hopefully it's the fresh water/coolant pump, as others have mentioned, which easier to repair. If it is a leaking head gasket, dealing with it asap may save you a bottom end rebuild. Eric On Mon, Jun 8, 2020 at 11:42 AM David Castor via CnC-List < cnc-list@cnc-list.com> wrote: > I have a similar issue on my Westerbeke in my not-a-C&C. I have some > suspicion of the water heater, but I don't notice anything in the water. > It's a bit of a mystery at this point. Let me know if you find it. > > On Mon, Jun 8, 2020 at 11:30 AM ALAN BERGEN via CnC-List < > cnc-list@cnc-list.com> wrote: > >> yes >> >> On Mon, Jun 8, 2020 at 11:27 AM David Castor via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >>> Alan, >>> >>> Are you referring to the coolant? >>> >>> On Mon, Jun 8, 2020 at 9:03 AM 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 >>>> _______________________________________________ >>>> >>>> Thanks everyone for supporting this list with your contributions. Each >>>> and every one is greatly appreciated. If you want to support the list - >>>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>>> <https://urldefense.com/v3/__https://www.paypal.me/stumurray__;!!LIr3w8kk_Xxm!5zxDJCR4MXLVDmxmTUsiZQqnNio4EDu6JsDbSBsI_cN100eQYGbSpozHXScLTFD1_8w$> >>>> >>>> -- >>> Excuse the brevity. Sent from my phone. >>> _______________________________________________ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- >>> https://urldefense.com/v3/__https://www.paypal.me/stumurray__;!!LIr3w8kk_Xxm!5zxDJCR4MXLVDmxmTUsiZQqnNio4EDu6JsDbSBsI_cN100eQYGbSpozHXScLTFD1_8w$ >>> >>> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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