In the process to troubleshoot my leak I guess it's the time to replace the heat exchanger according to my expert!
Yesterday I removed it from its very unaccessible location. I will definitely mount it back aft.
Once removed I was able to read the part number / SKU: Seakamp 200420 and take some mesurements.
Now here is my question, do I replace with the exact same model? And where should I buy it?
Some pictures of the little guy :)
For the inches to mm value, I was using my vernier caliper, and not sure if it's in metric or standard. So maybe some numbers are a bit off, also since I guess this heat exchanger didn't move for the last 10 years, they are not the exact value.
So far I saw the part there:
- $436.80: http://www.mrcool.us/200420cn-universal-westerbeke-medalist-heat-exchang...
- $496.08: http://inetmarine.com/skuni200420cnheatexchanger.aspx
Are they good place to get it? Fair price? Better place to check?
Ludovic François
Hotel Catalina - Catalina 36 Hull #883
Marina Del Rey, CA



why not just take it to a radiator shop and have them clean it up, and give the outside a good coat of paint (or powder coat).
Les
Les & Trish Troyer
Mahalo
Everett, WA
1983 C-36 Hull #0094
C-36 MK 1 Technical Editor.
Commodore
It's an option, but not sure about who I could ask to do that here in LA? And does it worth it? I have the feeling it needs more than a clean up. Especially it was leaking.
Ludovic François
Hotel Catalina - Catalina 36 Hull #883
Marina Del Rey, CA
Try calling Chris @ Bolsa Radiators in Fountain Valley. I believe LA county has tough restrictions on repairing/cleaning out these types of heat exchangers but I've talked to Chris in the past and he still services them. We are planning to take ours in for service soon as well. Cheers!
Heat Exchangers 101: Sources for replacement Good Guys at Sendure
http://c34.org/bbs/index.php/topic,6920.0.html
Stu Jackson, C34IA Secretary, C34 #224, 1986, SR/FK, M25 engine, Rocna 10 (22#)
So I replaced it over the weekend with the SEAKAMP model shipped by Mr Cool (http://www.mrcool.us/200420cn-universal-westerbeke-medalist-heat-exchang...). For now, I just replaced in the same location at it was before, the ultimate goal is to move it aft, but I want to avoid to add more troubleshooting for now.
The heat exchanger came with brackets AND clamps as you can see in this picture:

So I feel a bit concern about the brackets shipped with the HE, if I use them, I don't see how I can use the clamps.
This is how it looks so far:
What do you think about it?
I don't feel very comfortable the way it is now. Thinking to reuse the previous bracket going all the way around the HE.
Ludovic François
Hotel Catalina - Catalina 36 Hull #883
Marina Del Rey, CA
On our boat, at least, the large hose-type clamps go around the brackets and the heat exchanger.
See photos at https://www.catalina36.org/comment/57504#comment-57504
Matthew Chachère
s/v ¡Que Chévere!
(Formerly 1985 C36 MKI #466 tall rig fin keel M25)
2006 Catalina Morgan 440 #30.
Homeported in eastern Long Island, NY
It would appear the two middle pieces are the brackets that you bolt to the back of the block. Then the clamps would go around the exchanger & bracket where the offset is.
Gary Bain
S/V "Gone With The Wind"
Catalina 36', Hull #: 1056, Year: 1990, Engine: M-35
Standard Rig
Moored: Boothbay Harbor, Maine
Home: Auburn, Maine
Updated my setup, look a bit more pretty, even if it will be way better when I will move it the way Matthew suggested it!
I also did few (ok a lot of them) flush of my radiator since it seems a lot of salted water has been living on the fresh water side of the cooling system.
To do that I used a cheap tool found on amazon (https://www.amazon.com/gp/product/B002C0A7ZY) to mesure how salty the remaining coolant was, a temperature gun (https://www.amazon.com/gp/product/B00K5QVBCU) pointing the top of the thermostat and a lot of free time! Not sure it was really usefull but it made me happy :)
Here a picture of the radiator flush cleaner I used!
I am done with my heat exchanger / cooling system replacement for a while I hope. It was a very instructive process :)
Ludovic François
Hotel Catalina - Catalina 36 Hull #883
Marina Del Rey, CA
Any idea what is the zinc matching this heat exchanger? Seakamp just replied to me "¼ npt thread zinc is 1.7 inch"
But not sure how to interpret it.
Ludovic François
Hotel Catalina - Catalina 36 Hull #883
Marina Del Rey, CA
size E0 from this site. They also have a page for the kind you screw into the brass cap - but you may have to cut that to length - I'm still stuck with the 2" HE - so have the very very small one.
http://www.boatzincs.com/engine-sizes.html
Les & Trish Troyer
Mahalo
Everett, WA
1983 C-36 Hull #0094
C-36 MK 1 Technical Editor.
Commodore