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06-23-2021, 11:53 PM
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#1
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Member
City: Juneau
Join Date: May 2019
Posts: 13
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Heat exchanger hose drips
My heat exchanger is dripping anti freeze where the one inch hose connects. I have pulled it off and sanded the copper nipple, tried double clamps which actually made it a bit oblong instead of round- nothing works.it still has a slow drip when he warms up.
Any suggestions on how to fix this would be greatly appreciated
Jim
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06-24-2021, 12:05 AM
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#2
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,129
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It could be a hairline crack that opens up when it is hot. Where the nipple goes into the heat exchanger would be my guess. Maybe wipe it while it is dripping and them immediately hold a paper towel by the area and see where the towel gets wet, may take several tries to locate it. It might show up in a pressure test at a radiator shop.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
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06-24-2021, 12:51 AM
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#3
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Guru
City: Gulf Islands, BC Canada
Vessel Name: Sea Sanctuary
Vessel Model: Bayliner 4588
Join Date: Jul 2019
Posts: 4,993
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Have you tried a applying a heat gun gently to warm the hose and then tightening the hose clamp.
__________________
SteveK
You only need one working engine. That is why I have two.
Sea Sanctuary-new to me 1992 Bayliner 4588
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06-24-2021, 02:00 AM
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#4
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Guru
City: Queensland
Vessel Model: Milkraft 60 converted timber prawn trawler
Join Date: Jul 2016
Posts: 5,482
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Check the hose isn't split from overtightening.
__________________
Everything on a boat is broken, you just don't know it yet
Full time cruising is repairing boats in exotic locations
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06-24-2021, 10:08 AM
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#5
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Member
City: Juneau
Join Date: May 2019
Posts: 13
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Quote:
Originally Posted by Simi 60
Check the hose isn't split from overtightening.
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New hose
Leaks after running ten minutes
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06-24-2021, 10:19 AM
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#6
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Guru
City: Nanaimo
Vessel Name: former owner of "Pilitak"
Vessel Model: Nordic Tug 37
Join Date: Feb 2018
Posts: 1,703
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I would try applying some Rector Seal 5 (or similar) to the inside of the hose to act as a sealant then clamp. If that does not help, then to me, you probably have a crack or other leak in the heat exchanger. I had a small crack (found due to just such a leak) on my generator heat exchanger. Sent it into the radiator shop for cleaning, repair, and pressure testing. No problem after that.
__________________
Tom
Nanaimo, BC
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06-24-2021, 12:04 PM
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#7
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Member
City: Juneau
Join Date: May 2019
Posts: 13
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Thank you
Never heard of tector but will check it out
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06-24-2021, 03:10 PM
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#8
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Guru
City: Adelaide
Vessel Name: Kokanee
Vessel Model: Cuddles 30 Pilot House Motor Sailer
Join Date: Jul 2012
Posts: 3,218
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Quote:
Originally Posted by Jamesorr
My heat exchanger is dripping anti freeze where the one inch hose connects. I have pulled it off and sanded the copper nipple, tried double clamps which actually made it a bit oblong instead of round- nothing works.it still has a slow drip when he warms up.
Any suggestions on how to fix this would be greatly appreciated
Jim
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Make sure the the nipple is long enough to double clamp. Both clamps need to be over the nipple, and are not squeezing an unsupported part of the hose.. If the clamps are too wide to fit, you may have to use a single clamp.
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06-27-2021, 04:24 PM
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#9
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Guru
City: hawaii
Vessel Name: #31
Vessel Model: ex-Navy MUB 50 fish/cruise
Join Date: Aug 2013
Posts: 869
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Quote:
Originally Posted by Jamesorr
Thank you
Never heard of tector but will check it out
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That’s”Rector Seal #5”, it’s available at Lowe’s.
It’s awesome stuff, I use it for many things, sealant, thread lube, corrosion protection, hose lube, whatever!
__________________
You can lead a horse to water,
But you can't make him ski...
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07-02-2021, 04:45 PM
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#10
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Member
City: Juneau
Join Date: May 2019
Posts: 13
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Rector
Quote:
Originally Posted by kapnd
That’s”Rector Seal #5”, it’s available at Lowe’s.
It’s awesome stuff, I use it for many things, sealant, thread lube, corrosion protection, hose lube, whatever!
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This stuff solved the issue - no drips!
Thanks to all for the feedback
Jim
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07-02-2021, 05:20 PM
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#11
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,129
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Glad you got it fixed.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
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07-02-2021, 08:40 PM
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#12
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Guru
City: Aventura FL
Vessel Name: Kinja
Vessel Model: American Tug 34 #116 2008
Join Date: Oct 2017
Posts: 10,595
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Time to lay in some 'constant torque hose clamps"???
Yup, I need some too.
__________________
Two days out the hospital after a week in the hospital because of a significant heart attack.
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