Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 22-09-2015, 22:28   #16
Registered User
Orion Jim's Avatar

Join Date: Dec 2008
Location: Noank, Ct. USA
Boat: Cape Dory 31
Posts: 1,076
Images: 6
Re: Heat exchanger - how bad is it ?

Originally Posted by Jim Cate View Post
Paint a heat exchanger bundle??

No, paint the heat exchanger after it's been "rotted" out, inspected, and reassembled.

Orion Jim is online now   Reply With Quote
Old 22-09-2015, 23:11   #17
Registered User

Join Date: Oct 2011
Location: Canada
Boat: CT 56
Posts: 418
Images: 3
Send a message via Skype™ to undercutter
Re: Heat exchanger - how bad is it ?

Originally Posted by TopperHarley View Post
Hi Folks,

Today I checked the zinc on the heat exchanger for the first time on my new (to me) Catalina 30 Universal M25XPB. The engine is about 3 years old, done 200hrs.

Im unsure of the previous owners standard of maintenance, hence wanting to check the zinc ASAP.

My previous boat was raw water cooled so im not that familiar with HX's.

The entire zinc was gone and the picture looked something like this:

My question... how bad is this ? (I have no overheating symptoms)

If you are unsure of the standard of maintenance that the boat was maintained to then a thorough flushing of both sides of the cooling system should be performed. Based on the photo posted at the very least I would have the heat exchanger cleaned professionally (mine, I would replace). removal will also allow inspection and replacement of hose clamps, hoses etc. which may be poor.

I have found that the worst thing for cooling systems, especially the raw water side, is to not run. best to drain and flush whenever long idle periods are expected. 200 hours in 3 years is not a lot. Is this a new install in the boat or is the boat only 3 years old.

Your engine will never overheat until you need it the most.

undercutter is offline   Reply With Quote
Old 23-09-2015, 05:05   #18
Registered User
Greatketch33's Avatar

Join Date: Feb 2011
Posts: 148
Originally Posted by Jim Walsh
No, paint the heat exchanger after it's been "rotted" out, inspected, and reassembled.

I didn't paint the bundle (inside component) but did paint the casing (outside component). Replace the rubber seals too.

I didn't have enough information to decide painting the bundle made sense because of the following thoughts:

Would paint on the bundle eventually gum up and eventually float about the internals?

Does paint on the bundle help or hinder in the heat exchange process and would it matter?
Attached Thumbnails
Click image for larger version

Name:	image-1185689654.jpg
Views:	54
Size:	139.1 KB
ID:	109685  
Greatketch33 is offline   Reply With Quote
Old 23-09-2015, 06:44   #19
Registered User
Snore's Avatar

Join Date: Jan 2011
Boat: Tartan 33
Posts: 1,882
Re: Heat exchanger - how bad is it ?

For those of us who are frugal (cheap), remove both end caps from the heat exchanger, cut a wire hanger up and use it to clean each of the tubes.

Then use a vacuum to clean the loosened debris out of the heat exchanger. Then take a garden hose and use it tot blow clean water through the salt water side of the heat exchanger. Vacuum again.

The reason for vacuuming is that if you don't, the loosened debris will collect in the small hose that goes to the missing elbow where it will collect and cause problems. Trust me, I had to fix that also

Be sure to use fresh gasket material when you reassemble the device.

" requires a strong moral principle to prevent me from deliberately stepping into the street, and methodically knocking people's hats off- then, I account it high time to get to sea..." Ismael ---- NEW website!
Snore is offline   Reply With Quote

heat exchanger

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Which Heat Conductive Material to Boost My Exhaust Heat Exchanger? Exhaust Shanaly Plumbing Systems and Fixtures 4 05-07-2013 04:58
Heat Exchanger Conversion clausont Engines and Propulsion Systems 15 21-02-2008 18:57
Yanmar heat exchanger R&B Engines and Propulsion Systems 10 21-02-2007 12:05
Heat Exchanger Anode chuckiebits Engines and Propulsion Systems 3 19-07-2006 14:51
cleaning heat exchanger AnotherSailorman Engines and Propulsion Systems 10 24-05-2005 19:30

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 23:02.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.