While I was tracking an oil leak that was pooling on the heat exchangers I took a piece of metal and Jb welded a ramp so the oil would drip off the exchanger and not pool. The jb weld held until I found the leak (rocker shaft seals fixed it) and I had to chisel it of, there are still remnants there on the top of the exchanger.

So on the outer part of the exchanger it will definitely hold.

I have used it on a rusty 911 muffler and 914 heat exchangers with good results. The key is prep. Clean bare metal.

Clean bare metal but make sure it isn't shiny! It helps to have some "scuff" to bond to.

ROTFLMAO!

Yeah, probably the funniest thing I've ever said.


How sad.

From that site:

Q: Is J-B Weld toxic?

A: No. J-B Weld is non-toxic. However, we do not recommend consuming the product.

:eek:

Who would even think of eating it?

Its pretty good on an english muffin.

Thanks for the link Mikester:
http://jbweld.net/faq.php#faq002

Q: Will J-B Weld work on an automotive exhaust?

A: Because of the extreme temperatures of exhaust systems, we do not recommend J-B Weld for use on exhaust manifolds and catalytic converters. Nor do we recommend the product for repairs within the combustion chamber.

I have tried it on cast iron exhaust manifolds, it usually shrinks and cracks off. But have had great results on water-jacketed marine manifolds.

It's been plugging a hole in my truck's oil pan for a couple years now. Maybe I should put the story in the stupidest things you done thread :D.

+1

4 yrs and holding strong!

excellent for gluing spacers, reel seats, and cork to a rod blank. slow set-up time gives you time to maneuver anything mis-aligned

(go fish)

Bill K

used it on a water pump in a home water system, held forever, and a radiator drain plug. clean, dry surface, the slow setting stuff, and a heat lamp. 24 hours before use of the repaired item.

Probably better than this stuff :D

http://www.delsjourney.com/images/ho...5_Vegemite.jpg

the vegamite sandwhich!

Apologies to our Aussie brethren but Vegemite is some nasty stuff. Peanut butter it ain't.

I have patched motorcycle engine cases with JB and never had it fail yet. Amazing stuff.

Years ago, circa 1978 or so was driving up in Northern part of Missouri on a country road. All of a sudden lots of blue smoke out of the back so I stopped.

I had picked up a bolt with one of my front tires and somehow thrown it into my oil pan. No idea where it came from, but it was not from my car. Found it lodged in the side of the aluminum oil pan, with oil dripping out near the exhaust manifolds. Limped the car into a nearby garage and we put it up on the lift. Not many Jaguar oil pans in that neck of the woods.

We cleaned it off with spray brake cleaner and sealed it up with JB weld and let it sit for lunch. Re-filled it with oil and headed home.

That repair lasted for almost 30 years until I restored the car two years ago. Found the repair and smiled at its lasting that long. The oil pan is retired now and a serviceable unit in its place.

Done correctly JB weld will do almost anything and last a long time.

let me take a chance. So, JB weld can't stand the heat as hot as exhaust manifolds. Is there any similar product which can, beside real welding?

My wife's uncle was a tractor repair mechanic. He said on a regular basis he had tractors come in for a complete engine rebuild and would find repairs done to an engine block done with JB Weld. He said if it was an area that was cost effective to weld up they fixed it right. Sometimes they just left it alone at the farmers request. He saw some interesting repairs done by farmers trying to get the crops in.