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Heat Exchanger - M25-XPB - SEAKAMP 200420

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ludo
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Heat Exchanger - M25-XPB - SEAKAMP 200420

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:

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

LeslieTroyer
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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

ludo
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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

pilotsailor
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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! 

stu jackson c34
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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#)

ludo
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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

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Chachere
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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! #466
1985 C36 MKI tall rig fin keel M25
Homeported in eastern Long Island, NY

GaryB
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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: East Boothbay, Maine
Home: Auburn, Maine

ludo
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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 :)

Day Time Cooling TDS value (ppm) Temp min (°F) Temp max (°F)
Saturday 12:30 tap water 7100 95 146
Saturday 15:17 tap water 5000 118 146
Saturday 16:12 tap water 3000 118 146
Saturday 17:15 tap water 2000 115 148
Saturday 18:45 tap water 1400 103 148
Saturday 20:35 tap water 1000 107 148
Sunday 10:00 tap water 900 108 148
Sunday 12:00 distilled water 600 120 145
Sunday 13:00 distilled water 400 120 146
Sunday 18:50 flush cleaner 5000 120 146
Sunday 20:30 distilled water 4000 120 146
Sunday 21:30 dexcool NA 120 146
  • TDS value was always mesured during the draining step when the engine had cool down.
  • Temp min was taken before to start the engine again
  • Temp max was taken just after I ran the engine for at least 10 minutes

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

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ludo
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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

LeslieTroyer
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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

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