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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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Dustin |
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10-25-2012, 04:16 PM
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Hell Belcho
Join Date: Sep 2006
Location: Oz
Posts: 9,251
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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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Saved by the buoyancy of citrus. |
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10-25-2012, 04:25 PM
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JW Apostate
Join Date: May 2004
Location: Napa, Ca
Posts: 14,164
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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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'74 914-6 2.6 SS #746 '01 Boxster |
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10-25-2012, 04:52 PM
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Registered
Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,860
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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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No left turn un stoned |
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10-25-2012, 05:49 PM
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Functionista
Join Date: Jul 2011
Location: CO
Posts: 7,717
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Get a patch brazed over it.
Properly repaired, it will be stronger than before. |
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10-25-2012, 09:56 PM
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Registered
Join Date: Dec 2002
Location: Dahlonega , Georgia
Posts: 14,710
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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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2002 Boxster S . Arctic silver + black top/int. Jake Raby 3.6 SS engine " the beast ". GT3 front bumper, GT3 side skirts and GT3 TEK rear diffuser. 1999 996 C4 coupe black/grey with FSI 3.8 engine . Rear diffuser , front spoiler lip with ducktail spoiler . |
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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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Dustin |
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10-26-2012, 05:10 AM
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Almost Banned Once
Join Date: Feb 2009
Location: Adelaide South Australia
Posts: 38,510
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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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- Peter |
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10-26-2012, 05:46 AM
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19 years and 17k posts...
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I used JB Weld on my heat exchangers and it held for a few seasons...
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Art Zasadny 1974 Porsche 911 Targa "Helga" (Sold, back home in Germany) Learning the bass guitar Driving Ford company cars now... www.ford.com |
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10-26-2012, 04:56 PM
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Functionista
Join Date: Jul 2011
Location: CO
Posts: 7,717
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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? |
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10-26-2012, 07:37 PM
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Registered
Join Date: May 2004
Location: New Hampshire
Posts: 6,152
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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
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11-04-2012, 04:58 AM
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Registered User
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Quote:
 WowI 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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Dustin |
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11-04-2012, 06:13 AM
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MazdaSpeed3
