where oh where did the coolant go? - SailNet Community
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where oh where did the coolant go?

just came into sf bay from Hawaii. bout 4 days out was shocked from sleep with hi temp alarm going off.. Sea strainer had some stuff but was still letting in water. took 1/2-3/4 gal of coolant? motored for several days to finish trip and coolant is low again. No coolant under the engine or bilge. Where could it be going? Head gasket? if so what other symptoms would I see. Engine runs fine except....this morning was really hard to start.

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Re: where oh where did the coolant go?

Well if it's not leaking out anywhere it is in the oil . If it's not in the oil , I would suspect a leak in the heat exchanger and the coolant is going out with the raw water exhaust . Congratulations on your crossing .

Mark .

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Re: where oh where did the coolant go?

Hope it is HX.

1st check.

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Re: where oh where did the coolant go?

If it was in the oil I don't think that you would have motored for several days. Did you continue to look at your temp gauge to see if it was running hot? My guess is HX...had one rebuilt and it is running just fine now. Same symptoms. Hope that is your only problem.
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Re: where oh where did the coolant go?

With a water laden exhaust it's probably alot harder to identify coolant being burned\consumed in the cylinders compared to a regular vehicle where you would see the white smoke and smell it burning.

Was it always hard to start? Hard start on a diesel could be a few things, including lost compression from a leak in the head gasket, which would also explain missing coolant. Not to say the sky is falling of course. See if you can sample some of the coolant inside the engine, see if it has any diesel mixed in with it which would also indicated a head gasket leak. It is possible for the leak to not drip when the engine is off, but once warmed up produce the leak. My blown head gasket on my Ram didn't leak a drop into the oil pan, but once the engine was started I could see the air bubbles pushing up into the radiator from the compression stroke, the intake stroke would suck a bit of coolant in and burn it then send it out the tailpipe. Coolant has to go somewhere in a closed system like this, and I do hope it's your HX in the end.

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