JB Weld

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JB Weld

Postby sviennadan » Tue May 09, 2006 1:17 pm

Anyone have experience with JB Weld at high temperatures? Ineed to fix a crack on an aluminum block lawn mower, so it's only air cooled.
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Re: JB Weld

Postby George Willer » Tue May 09, 2006 2:34 pm

sviennadan wrote:Anyone have experience with JB Weld at high temperatures? Ineed to fix a crack on an aluminum block lawn mower, so it's only air cooled.


It's been a long time since I made such a repair, but I think JB Weld will resist any temperature below what the lubricating oil can resist. Maybe the difference is very slight, but you should be good to go.
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Postby George Willer » Tue May 09, 2006 2:36 pm

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Postby cowboy » Wed May 10, 2006 9:46 am

I used it to seal the top of my radiator and it held up fine for a year at which point I had it recored.

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Postby 'Country' Elliott » Thu May 11, 2006 4:56 am

My experiences with JB Weld have ALL been positive :wink: I have found that the bonding works far better when cracks are properly CLEANED and free of any dirt or grease. I use brake cleaner on the surfaces to clean them.

I use a DREMEL fine rotary bit to enlarge the crack slightly, and get a NEW, clean surface to work with.

Mixing EQUAL amounts is extremely important for a lasting bond. So if you squeeze out two equally looking lines of JB Weld (close to, but not touching each other)...you can cut them BOTH (at either end) with a single edge razor blade and discard any excess BEFORE you mix them together. :wink:
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Postby John *.?-!.* cub owner » Thu May 11, 2006 7:26 pm

I've never tried it myself, but they claim you cna use JB Weld to install valve seats.
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