[C320-list] Yanmar Heat Exchanger

[Dave Anderer]

Thanks Jeff.  It was indeed the monkeys that had me concerned!

On Thu, Jun 17, 2010 at 2:23 PM, Jeff Hare <catalina at thehares.com> wrote:

> Hi Dave,
>
> I've done this and it is trivial. Found a leaf in mine.  :)
>
> 1. Close eng. Thru-hull
> 2. Empty the exchanger using the little drain thingy on the aft end of the
> exchanger. (Optional, especially if you've had the impeller out)
> 3. Remove 4 nuts from the exchanger's front side and remove the end cap.
> 4. Be careful of the rubber gasket
>
> No springs, ball bearings or monkeys will fly out at you. Pretty easy. I
> didn't need any replacement gaskets but if yours are damaged, you might.
>
> The thermostat may also be the culprit.  It's on the engine AntiFreeze
> side, so its a bigger job. If you've changed the AF recently you could have
> an air block but that would cause the temp to go up a lot most likely.
>
> -Jeff
>
> -----Original Message-----
> From: Dave Anderer <danderer at udel.edu>
> Date: Thu, 17 Jun 2010 14:10:15
> To: <C320-List at catalina320.com>
> Subject: Re: [C320-list] Yanmar Heat Exchanger
>
> Thanks.  Actually, I was thinking of just yanking the core (pop the two end
> caps and push it out) rather than pulling the whole exchange assembly from
> the block.  I think I saw that approach suggested in a shop manual I have
> around here somewhere.
>
> Does that make any sense based on your experience?
>
>
>
> On Thu, Jun 17, 2010 at 1:59 PM, Jon Vez <jonvez at comcast.net> wrote:
>
> > Dave,
> >
> > Very easy to do. However, make sure you order and have on hand a gasket
> > that
> > goes between the exchanger and the engine block. There are two types, so
> > make sure you get the one appropriate for your engine....
> >
> > Regards,
> >
> > Jon Vez
> > Solstice #582
> >
> > -----Original Message-----
> > From: c320-list-bounces at lists.catalina320.com
> > [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Dave
> Anderer
> > Sent: Thursday, June 17, 2010 1:45 PM
> > To: c320-list
> > Subject: [C320-list] Yanmar Heat Exchanger
> >
> > I've noticed a slight uptick this season in the temp gauge on my 3GM30F.
> > Nothing major, but it seems to run a little hotter than I recall at my
> > normal cruise speed of 2800 RPM.
> >
> > I'm checking the usual suspects, but it also occurs to me that I've never
> > pulled the heat exchanger and had it cleaned.  Looking at the manual,
> > pulling it seems to be a trivial task.
> >
> > Anyone done this and have any insights/suggestions?
> >
> > Thanks.
> >
> >
>