[C320-list] engine overheating

[Jon Vez]

Thanks Jeff...will take pics and send them to you--probably will do so next
week...Have a great weekend...

Regards,

Jon

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of
catalina at thehares.com
Sent: Thursday, June 26, 2008 6:37 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] engine overheating

The gasket is an o-ring I think, and I just lubed it up and reattached
without any worries.

I didn't open the back side, but I think I'll do that sometime.

BTW, if you can, take a picture of what your end cap looks like.  I'm
curious if you have the same divider in yours.

-Jeff

> Jeff,
>
> I had added the heat exchanger to my maintenance list so the timing is
> perfect. Is the gasket reusable or should I order one before I open the
> exchanger? Thanks!
>
> 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
> catalina at thehares.com
> Sent: Wednesday, June 25, 2008 2:29 PM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] engine overheating
>
>
> Hi Matt,
>
>    All the responses so far are good info.
>
> Our raw water pump developed a leak where the pulley shaft enters the
> impeller area.  We have the Johnson pump, and it has a little $2 rubber
> bushing that forms this seal that could be pulled out with needle nose
> pliers and replaced to stop the leak.  Your hull has a slightly different
> pump, but you may still have a similar rubber seal that can be replaced.
>
> The raw water heat exchanger is a topic that hasn't been discussed much
> here.  This year, I removed the 4 nuts holding that cover in place and
> took a look to see what condition the exchanger was in.  To my surprise, I
> saw a portion of a leaf laying across a few of the tube intakes.  If you
> had any blades of an impeller break off, they'd be in there too as the
> cooling tubes are too small for much debris to go through.
>
> Something I didn't fully understand was that there is a rubber gasket on
> the cover that divides the tubes into 2 sections at rougly 60/40 with the
> raw water entering the smaller section.  Since the outlet is at the back,
> it seems that 60% of the tubes don't get water flowing through them for
> cooling?
>
> Perhaps, this is a way to allow the engine to be used in different
> applications with different temperatures of cooling water available simply
> by supplying a different front inlet cap?
>
>   Anyway, this makes it seem like any debris in the smaller chamber could
> have a serious effect on the heat exchanger's ability to do its job.  If
> you haven't removed this cover before, it's simple.  No springs or ball
> bearings are poised to shower your cabin and the amount of water in
> there is very small.  Also, this doesn't open up into the antifreeze
> loop, just the raw water loop, so it's a simple procedure.
>
> Cheers!
> -Jeff
>
>
>> Hi,   This past Sunday, the engine was running hot and eventually the
>> temp
>> alarm atarted sounding.  I shut her down and waited to open the engine
>> hatch.
>
>>   I noticed a little bit of water seeping out from under the forward
>> engine compartment hatch, and when I looked, I could not identify where
>> it came from.
>>
>>   I troubleshooted from the raw water inlet to the water pump - all is
>> fine.  Should my next step be to look at the mixing elbow?  I've read
>> that deposits can build up, leading to less flow and ultimatley
>> overheating.
>>
>>   I'm worried because thw elbow is covered in heavy duty Al foil,
>> presumably because the previous owner found or assumed a leak...I'm
>> scared as to what I might find!
>>
>>   Any thoughts/tips/ideas?
>>
>>   Thanks!
>>
>>   Matt Curtis
>>   Tortuga, #541
>
>
>