[C38] Heat Exchanger?!

[david at dlrfilms.com]

Happy to report that I ran the engine hard today (two trips, south winds,
no way to sail into Montauk Harbor) and it never went over 135. I guess
that means I'd better put the thermostat back in.

Thanks everyone for their help sympathy, etc!

http://www.sailingmontauk.com/blog/livin-the-dream/


> So for whatever reason I decided I'd take apart the heat exchanger and see
> if it was clogger or rotted out or whatever.
>
> When I opened it up, the gasket was encrusted and so deformed it looked
> like a custom made gasket for the piece.
>
> Took it home. Boiled it in vinegar. Rinsed. Got a new gasket, hooked all
> the hoses back up, fired up the engine and conservatively I'd say at least
> 4 times the amount of water was coming out the back end of the boat.
>
> Before the tear down I did a cold-start log of the temperature climb.
> After putting it all back together (thermostat is still out) it was
> unchanged at 130 after 20 minute. So later today I'll to the same and see
> if there's any change.
>
> THEORY:
>
> I think I did have a bubble problem. We be puttering across the lake,
> engine on only a few minutes then *bam* the temp would suddenly climb.
> Shut down, engine still cool, open the pressure cap, scratch head. Resolve
> to never use engine ever again. I think (hope!) all the flushing,
> cleaning, rinsing fixed that.
>
> Meanwhile I think the heat exchanger performance was degrading. So instead
> of sudden overheats, I was getting about an 60-70 minutes from dead cold
> to 190.
>
> Anyway. We'll see what happens later today.
>
> Then on to the leaky injector...
>
>
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