[C38] Overheat False Alarm

[Larry Malmberg]

I believe there is a small plug near the water pump that you can remove, add
coolant until it comes out, replace the plug, run the engine for a couple of
moments, remove the plug again and air will come out, keep doing until you
have no more air.  This is just from memory. 






Best regards,

Larry Malmberg

7231 Boulder Avenue Suite 507
Highland, CA 92346 PI 15211
Telephone  909-208-1847
FAX           909-991-7568

E Mail  Larrypi at roadrunner.com



 
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-----Original Message-----
From: listserve-bounces at catalina38.org
[mailto:listserve-bounces at catalina38.org] On Behalf Of david at dlrfilms.com
Sent: Sunday, June 05, 2011 7:17 AM
To: listserve at catalina38.org
Subject: [C38] Overheat False Alarm

My engine is back to doing that thing where the temp gauge climbs, the alarm
goes off, but the engine itself is not even too hot to touch, and I can
stick my finger in the coolant without getting scalded.

This problem plagued our 2008 and 2009 Summer sailing, but wasn't too big a
concern because we never ran the engine for more than about 5-10 minutes.

Thought I had it licked before our passage to the Caribbean in Nov 2009, and
indeed, ran the motor for hours on end with no such problem.

But now it's back, and with the wind out of the SE, that means getting back
into the harbor is a long enough run to get the overheat false alarm.

IIRC, cracking the thermostat housing open would (usually) solve the
problem.

The other thing I notice is that coolent is not following through the
overflow tube to the reserve tank. It's not blocked; it seems like there's a
air bubble that's keeping the coolant from flowing.

I remember something about running the engine, and then adding more coolant
after it burps or some such. I have my manual and will re-read.

Meanwhile, any helpful hints are much appreciated.


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