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Old 06-23-2021, 11:53 PM   #1
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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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Old 06-24-2021, 12:05 AM   #2
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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.
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Old 06-24-2021, 12:51 AM   #3
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Have you tried a applying a heat gun gently to warm the hose and then tightening the hose clamp.
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Old 06-24-2021, 02:00 AM   #4
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Check the hose isn't split from overtightening.
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Old 06-24-2021, 10:08 AM   #5
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Originally Posted by Simi 60 View Post
Check the hose isn't split from overtightening.
New hose
Leaks after running ten minutes
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Old 06-24-2021, 10:19 AM   #6
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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.
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Old 06-24-2021, 12:04 PM   #7
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Thank you
Never heard of tector but will check it out
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Old 06-24-2021, 03:10 PM   #8
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Quote:
Originally Posted by Jamesorr View Post
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
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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Old 06-27-2021, 04:24 PM   #9
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Thank you
Never heard of tector but will check it out
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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Old 07-02-2021, 04:45 PM   #10
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Rector

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Originally Posted by kapnd View Post
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!
This stuff solved the issue - no drips!
Thanks to all for the feedback
Jim
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Old 07-02-2021, 05:20 PM   #11
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Glad you got it fixed.
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Old 07-02-2021, 08:40 PM   #12
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Time to lay in some 'constant torque hose clamps"???
Yup, I need some too.
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