[C38] C38 Losing circulating water

Mon Jun 16 14:10:31 EDT 2008

Are you using a coolant reservoir??
I had the same problem until I put plastic bottle as reservoir at the end of
the cap's hose!!

Max

2008/6/16, Bob Porter <hiawatha at localnet.com>:
>
>  Hi Folks;
>
> I have a persistent circulating water leak in my engine. I lose about 500
> ml of antifreeze in about 50 miles of motoring. I have changed out the heat
> exchanger, the hoses, the radiator cap. Any thoughts on where the leak might
> be?
>
> Bob Porter
> Hiawatha
>
> ----- Original Message -----
> *From:* Max Soto <maxsoto at gmail.com>
> *To:* Catalina 38 Listserve <listserve at catalina38.org>
> *Sent:* Monday, June 16, 2008 11:28 AM
> *Subject:* Re: [C38] Water pump
>
>
> This might help
> I got this from very old forums, but there are some part numbers.
> *Oberdorfer Rotary Seals must seal *07/30/02 10:53AM
> http://forums.torresen.com/eThreads/view/engines/view_post?id=3916
>
> The first time I changed the impeller on my Oberdorfer I ended up pulling
> the whole shaft out and after replacing the impeller on the shaft and
> inserting the shaft back into the pump it started to leak water. (This water
> will rust the front of your engine as well as the oil pan) Very bad news.
> The next time I replaced the rotary seals as well as the impeller and this
> did stop the water leak. The shaft seems to be shaped like a Coke bottle
> that necks down to a considerably smaller diameter at both the water seal
> and the oil seal center point. This necking looks like an intentional design
> feature. Anyway, my engine needed a higher capacity pump and it is now using
> a Sherwood water pump no. 302648 - 42175 that has twice the water flow
> capacity. The pump came as a kit #302837 for retrofiting Universal models
> 5411, 5416, 5424, 5432, and 5444
>
>
>
> *Sherwood has twice the flow of Oberdorfer*
>
> Markus Ritter (MarkusRitter at hotmail.com)
>
> 08/02/02 09:32AM
>
> I replaced my Oberdorfer last week with a Sherwood, so far it is great. I
> love getting more water through and I no longer get steam.  see
> http://sankaty.homestead.com/Universal_5432_rawwater_pump_cap.html    A
> KIT IS AVAILABLE TO MOUNT THE CURRENT PUMP ON the universal 5411, 5415,
> 5424,5432, & 5444 IN PLACE OF THE OBERDORFER. KIT PART #302837. THE KIT
> CONTAINS THE NEW PUMP AND MOUNTING HARDWARE   some folks have also changed
> to the 3 inch heat exchanger in place of the original 2 inch unit.
> see http://sankaty.homestead.com/Overheating_Heat_Exchanger_size_.html
>
>
>
> *Pumps/oberdorfer/sherwood re:kubota/universal prices and compare*
>
> Rick (pelago at phoenixcon.net)
>
> 08/05/02 11:09AM
>
> DEPCO PUMP COMPANY 1 800 445 1656   I have read with interest the posts
> re: gpm and cost and compare Oberdorfer with Sherwood.. the Universal/Kubota
> uses two types of pumps 2 bolt and four bolt, but in reality they are the
> same pump they are 202 pumps and the flow rate is 9.59 gal per minute at
> 2500 rpm... cost is $140.00 from Depco, I use them for all pump needs,
> rebuild kit is $32.31 and comes with all needed for complete rebuild. If you
> want to replace the shaft it is $21.57. Sherwood no longer makes the M-5 or
> the H-80 that would be the Sherwood model to replace the 202 style, However
> a Westebeke kit deal from Sherwood thru Westerbeke or Westerbeke distributor
> is G903 for 234.20..HOWEVER THE FLOW RATE IS DAMN NEAR THE SAME AS THE
> OBERDORFER...  no brainer 140.00 versus 234.20....  Just ordered a new
> oberdorfer as a backup for existing pump, also ordered a rebuild kit for ON
> HAND!!!!   happy sailing and Pelago is getting ready for cruise #8
> --
> Max Soto
> C38 #198 ESTANCIA
> Puntarenas, Costa Rica
>
>
>
>
>
>
>
>
> 2008/6/16, RICHARD KILROY <dickkilroy at verizon.net>:
>>
>> There are two water pumps on the 5424 one is the saltwater cooling pump
>> and
>> the other the fresh water circulation pump. I have replaced both on my cat
>> 38 I think it is the saltwater pump that Charles has leaking, it has a
>> long
>> name I have forgotten( sounds Italian I think) If that is the pump it
>> should
>> be replaced with a Sherwood which is adapted to fit  by the dealer. it
>> pumps
>> more gallons per minute and cools the engine better. If the Great Lakes
>> guy
>> doesn't have what you want you can also try Hansen Marine in Marblehead Ma
>> 781=631-3282. There is a freeze plug on the bottom of the face of the
>> engine
>> where this pumps drip will run , if it goes on long enough, the freeze
>> plug
>> will corode and fail and you will loose the engine oil, again it happened
>> to
>> me in saltwater. Hope all ends well
>>
>> Dick
>>
>>
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>>
>
>
>
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-- 
Max Soto
C38 #198 ESTANCIA
Puntarenas, Costa Rica
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