[C38] Mor(on) Overheating

[david at dlrfilms.com]

So far as I can tell, no coolant in the raw water. No oil/oiliness in the
coolant either.

Had a minor disaster with my oil. A filter I should have replaced
purferated and dropped the oil. But didn't run for long and so far as I
can tell, no damage done, except if dropping your oil is a good way to
ruin your head gasket.

The pressure cap not flowing is a long-standing issue, going back to the
fellow who had the boat before me at least. Crossing my fingers it's a
cleanliness/clogging problem in the freshwater system and not a head
gasket, because the latter sounds a like a big adventure to fix!

I am very thankful for the help, and hopeful a flush, clean, and radiator
fixing goo will help.

Also, who needs a damn motor anyway?  ;-)

http://www.sailingmontauk.com/blog/light-air-supreme/


> When I removed my raw water hose from the heat exchanger side the fresh
> water coolent would drain out . Tom correctly diagnosed this as a leaky
> heat exchanger. As long as I didn't tighten the cap the pressures were
> somewhat equalized and there was no coolant loss, as soon as I made a
> power change all the coolant went out through the exhaust .
> Hope this helps David
> Paul
>
> ----- Original Message -----
> From: david at dlrfilms.com
> Date: Tuesday, June 21, 2011 6:08 am
> Subject: [C38] Mor(on) Overheating
> To: Catalina 38 Listserve <listserve at catalina38.org>
>
>> So I found the drain plug at the lower port forward corner. Have
>> not had
>> the chance to do a flush and fill from the bottom. (Still a little
>> confuzelled how I'm going to fill from the bottom.)
>>
>> I did take the thermostat out, and ran the engine with the
>> coolant level
>> about 1 inch from topped off. I could see a steady flow of
>> coolant coming
>> in from the thermostat housing to the forward inlet on the tank.
>>
>> I have noticed that I was not getting any flow from the two-way
>> radiatorcap into the overflow tank, and the previous owner had
>> mentioned sometimes
>> it would stop for no apparent reason.
>>
>> I fiddled with the cap for a while, wondering if it was clogged
>> or jammed,
>> but couldn't find anything, so I just removed the lower gasket
>> and tried
>> it that way.
>>
>> No luck.
>>
>> Plenty of flow through the cap and out to the overflow tank, but the
>> engine temp still climbed in short order, yet the coolant itself
>> was cool
>> enough to stick my finger in.
>>
>> Considering I could actually *see* the coolant flowing, this was quite
>> frustrating.
>>
>> Also, when I ran with the cap off, it seemed like their were bubbles
>> coming up. It made me wonder if the system might be aspirating
>> air, and
>> (re)creating a bubble.
>>
>> Help?
>>
>> Meanwhile, drain, flush, refill.
>>
>> Argh!
>>
>>
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>
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