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Unread 09-28-2014, 02:44 PM   #1
svshaw82
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JB Weld vs Trans Cooler

Hey guys. I've got a beat up trans cooler I was trying to make a dual cooler. I used a map gas torch and pulled the soldered ends off of it. My question was, would JB weld withstand transmission fluid? Basically what I did was removed the 180 degree ends out of the cooler, and used JB weld to put in some brass barbs. So I can run both transmission fluid and power steering in this single cooler. I cleaned the cooler of all oil, and sanded down rough all the aluminum and brass fittings. Was 100% clean and dry when I used it. I know both return lines don't see much hear or pressure, (JB weld claims tensile strength of 3969 psi, and 550 degrees heat resistance) I know trans fluid or steering will ever get near those specs. See the picture I attached. Let me know your thought? I've already attached the cooler to my house water hose, confirmed my fittings do Not leak under pressure. (I blew the hose off my connections after a few minutes with the end capped off. Where the hose met my cooler line, not off my fittings)

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Unread 09-28-2014, 02:51 PM   #2
svshaw82
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I hate my iPhone when it comes to attaching pictures! They are always too big for posting! Grr!
image-4079237337.jpg

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Unread 09-28-2014, 07:50 PM   #3
jason m
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I wouldn't trust it. I have two stacked hydro coolers, I just run a low pressure line between the two and used the original fitting ends.
So to me either get the right cooler or have new ends welded on, I myself would not trust the life of my trans on jb weld.

Jason.
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Unread 09-28-2014, 09:27 PM   #4
thantos858
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Only time I would use JB weld like that would be to get off a trail. I have had JB weld fail on me even when mixed correctly under very light stress
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Unread 09-29-2014, 10:54 AM   #5
svshaw82
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Even if both metals were 100% cleaned and adhered tightly? My fittings are cured now and I did a second coat over the first coat of JB Weld and I can bend the aluminum before anything else moves.
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Unread 09-29-2014, 02:44 PM   #6
BESRK
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I would've just soldered them in place instead.

I guess the only way to tell, is to run it and see what happens.
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Unread 09-29-2014, 05:16 PM   #7
svshaw82
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I tried to solder them in place it wasn't holding the solder would only stick to the brass
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Unread 09-29-2014, 07:36 PM   #8
thantos858
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Quote:
Originally Posted by svshaw82 View Post
I tried to solder them in place it wasn't holding the solder would only stick to the brass
Gotta make sure its very clean and your using a good flux and the correct solder. Your local radiator shops should be able to do it for cheap.
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Unread 09-30-2014, 05:03 PM   #9
svshaw82
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The quotes I'm getting from my local radiator shops have been telling me, the cooler had to be "heli arc'd" and the price is between $45 and $65 dollars.

I think I might run the JB weld and see what happens. At those prices I could just buy a dual cooler. Lol!
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Unread 10-02-2014, 09:34 AM   #10
svshaw82
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Lol another shop said you can't solder brass to aluminum.
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Unread 10-02-2014, 11:37 AM   #11
svshaw82
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Also just got a response from JB Weld themselves. <P>

"Mr. Shaw,

The JB Weld is impervious to the transmission fluid meaning it will not dissolve over time based on the fluid. Thanks for your inquiry.

Sincerely,

Customer Service
JB Weld"
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Unread 11-13-2014, 12:00 AM   #12
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I plugged a 1/2'' hole that went through a Mazda RX7 oil cooler with JB weld and duct tape to hold it in one side. After cleaning it with 2-Butoxyethanol. A water based Heavy Duty commercial grade concentrated cleaner degreaser. One you can buy at any restaurant supply and great cleaner for all grease, parts, tools, what ever @ 50- 50 or less. A gallon that makes two or more gallons and is under five dollars.

The part was almost a grand locally at the time. I then boiled it out over a camp fire. It held for the life of the car, that car was running with that patch about ten years.

I plugged two dirt bike radiators the same way. They worked for some time but were shelved for new replacements during the same season. No leaks.

I would solder those ends or build up one heck of a dam to reinforce that part with JB weld. It does not look all that promising.
RN
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Unread 11-13-2014, 04:37 PM   #13
svshaw82
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Ok. The shops I called to price the soldering quoted me between $45 and $65. I could just buy a cooler for that much.

I totally cleaned the ends and roughed all surfaces with a wire brush and sandpaper. Did two layers of jb weld.

They told me it would be impervious to the transmission fluid and be able to withstand the pressure from the line.

I don't know now I might just scrap the project. I was just hoping I'd be able to find a new use for it.
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Unread 11-14-2014, 12:51 PM   #14
BESRK
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Try it and see what happens.. ?
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Unread 11-15-2014, 03:16 PM   #15
RedNeckCorvette
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You will have to keep down the vibrations. You can build a dam with tape and fill it with JB weld to support the patch. Just gluing with it JB will not work.
RN
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