Heat Exchanger Maintenance

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RPowers's picture
RPowers
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Joined: 7/16/11
Posts: 135
Heat Exchanger Maintenance

Hello,

I finally had a chance to do some maintenance today.

Did a complete oil change/new oil filter (after 80 hrs).

Changed the belt to new.

Changed the raw water impeller to new (was 2 years old, still looked great).

Got to the heat exchanger. Changed the pencil anode. The old one was almost gone (!). New one fit in great.

I have new end caps and gaskets for the heat exchanger, but held off pending advice from you experts.

Q: What is the best way to clean the inside passages? It seems like a challenge to get a poker or long brush inside the tubes because the side entrances have limited access (Universal 35). Any advice?

Btw, the engine runs cool enough, maybe I don't need to do anything.

Thanks!

Captain Rick Powers
(USCG OUPV)
1999 Catalina 36 mk II
Hull#1745
Std Rig, Fin Keel
Palo Alto, California

San Francisco Bay

baysailor2000's picture
baysailor2000
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Joined: 5/16/10
Posts: 218

As they say - do not fix it if it is not broken. I would leave it alone.

Haro Bayandorian, 1999 C36 MKII, Sail La Vie #1787, M35B,
Coyote Point, San Mateo, CA.

GaryB's picture
GaryB
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Joined: 10/26/08
Posts: 579

Sounds like your all set. Sometimes just takeing the ends off you can some of the anode (zinc) should it have crumbled. A wire through each tube to make sure there is no obstruction. Best way to clean the HE is to take it to a radiator shop and have them service it. Only need to do that if you are experiencing a problem.

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

stu jackson c34's picture
stu jackson c34
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Joined: 12/3/08
Posts: 1270

The best way to service the HX is to completely remove it from the engine.

Stu Jackson, C34IA Secretary, C34 #224, 1986, SR/FK, M25 engine, Rocna 10 (22#)

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