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Question JB Weld on brass?

The trombone cooler on my 911 developed an extremely slow seep that puts a very thin coat of oil on itself after a long drive. I can tell the general area where it is seeping from, but can't find an exact point. (There is a small dent in the area)

Can I put a coat of JB weld over the suspect area as a permanent fix (until I eventually get a carrera cooler )? Will JB weld react funny with the cooler?

If I don't fix the seeping now, do you think it will get worse?


Thanks guys!
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Old 10-25-2012, 04:16 PM
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Isnt the trombone cooler copper?

It might work, but im not sure how well it would hold up to alternating pressure and heat. I have used JB Weld to fix radiators before that held for years..

Personally, I'd braze it.
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Old 10-25-2012, 04:25 PM
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try scuffing the area with 80 grit paper and clean really well with acetone ( brake cleaner )

I like the JB Kwik. It's actually rated for petroleum patches.
I used it to patch a hole in a plastic gas tank and inside my Webers.



KT
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Old 10-25-2012, 04:52 PM
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I Bet you could get a trombone on the cheap, and have it in and out for just about the same amount of effort. I think I may have an old one laying around , I'll look. But, if you scuff it good , get it really clean, and all oil residue removed, I would think it would hold for a while. I did a quick and dirty roadside fix on a large split in an old vans copper/brass radiator tank, and it held for almost a year. This was without any real good prep work.
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Old 10-25-2012, 05:49 PM
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Get a patch brazed over it.

Properly repaired, it will be stronger than before.
Old 10-25-2012, 09:56 PM
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Get a piece of rubber hose that has the same ID ans the cooler pipes OD. Slit the hose length wise so you can slip it over the cooler pipe. Clean the area well and put a thin coat of JB. Slip the hose over the wet goop and clamp in place. Will hold up fine until you replace with Carrera cooler. When you remove the old cooler remove the rubber patch and sand the JB down/off. Have it fixed by brazing and sell to a new owner to be used for many years to come. Just disclose you had it patched. Good luck.
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Old 10-26-2012, 04:43 AM
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Thanks for the replies everybody!

I think I'll give the JB Weld a try later tonight.
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Old 10-26-2012, 05:10 AM
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Have you heard of "Silicone Rescue Tape"? Great stuff. I keep a role in the tool kit in my car. I've used it for all sorts of repairs around the house and car.

Rescue Tape - World's #1 Brand of Silicone Tape!

You could wrap that over the cured JB weld to help hold it in place.
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Old 10-26-2012, 05:46 AM
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I used JB Weld on my heat exchangers and it held for a few seasons...
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Old 10-26-2012, 04:56 PM
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When it comes to JB weld I have two axioms.

It will not seal against pressure and temp changes for very long.

Why spark an arc when you can squeeze a tube?
Old 10-26-2012, 07:37 PM
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Not something I would do but heres one that came in the shop for other work........



A section of copper pipe was used with JB Weld. Owner knew nothing about it, but it had recent body work and likely done there. He declined replacement of the hardline, as other issues were "more critical".

Nothing more critical than an oil line in my opinion, but it has been that way for a few months so the owner will "keep an eye on it".

Len

Old 11-04-2012, 04:58 AM
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Quote:
Originally Posted by BoxsterGT View Post


Not something I would do but heres one that came in the shop for other work........



A section of copper pipe was used with JB Weld. Owner knew nothing about it, but it had recent body work and likely done there. He declined replacement of the hardline, as other issues were "more critical".

Nothing more critical than an oil line in my opinion, but it has been that way for a few months so the owner will "keep an eye on it".

Len

Wow

I took my cooler off, and couldn't find any obvious place where it was leaking. I thought there was a dent that was around where it was leaking, but I couldn't find anything. I did a few mods to get additional space between the front tire and the cooler, as it was really tight for awhile. I'm thinking I might have run something over during my drive, and perhaps it got on the cooler.

I'm going to try to take another drive soon, but with 40*F temps, it is hard to get the external thermostat to open! I'm not too worried about the cooler even if it is leaking for now, as it such an incredibly small amount (not enough to drip, just sweat a tiny bit). I will be upgrading to a different style cooler, perhaps over the winter.

Thanks for the thoughts everyone

I appreciate it as always.
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Old 11-04-2012, 06:13 AM
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