JB WELD ? What's the biggest job you've used it on?

[creatine28]

I've used it on small jobs(drill bits, door handle etc),  but just  curious if anyone has use it on anything bigger or heavier?   The package says you can use it on farm equipment and engines, but not sure to what existent?

[Dartful Dodger]

I used it on my Darts cracked headers.

I don't know if I did it wrong, but within a day the crack recracked.

My car is so low to the ground; it's constantly bottoming out.
I think that and the heat are to much for JB Weld.

It worked great on my trunk latch and key ring.

[Sephroth57]

used it to custom mount an o2 bung in my exhaust , never had a problem with it. my friend fixed a crack in his intake manifold and its been fine too. great stuff

[RacerX]

A good friend and I used it to stick 3 fairly good sized pieces of cement back on that had broken off of the corner of the foundation of his house!  We were going to use some cement adhesive from Qui-Krete, but a structural engineer told us to use J-B Weld.

Silly us.  

[Martoon]

Several years ago, I worked for a guy doing basement waterproofing.  The system we used was called the "Beaver System" (hey, I didn't name it, I just installed it).  It was basicly a plastic ductwork that was glued down to the floor about an inch out from the wall, and any water coming in through the walls was routed through the ductwork to a drain or sump pump.

Anyway, the glop that we cemented it to the floor with was called "Beaver Seal", but it was the exact same chemical compound as JB Weld, only it came in gallon paint cans (a gallon of the pasty white stuff and a gallon of the syrupy black stuff).  We'd scoop both into a bucket, and mix it with a paint stirring bit on a drill.  Then we'd smear it on the ductwork with a trowel, stick the ductwork on the floor, and just use wet fingers to smooth the seam (just like bathroom caulk).  Truly amazing stuff.  It would stick and seal, even if there was standing water on the floor where we stuck it down, and it was a lot harder than the concrete we stuck it to.  I ended up with a lot of pairs of armor-plated jeans working that job.

Since then, I've used JB Weld to fix all kinds of things (radiators, bathtubs, silverware, you name it), but I'd have to say the entire perimeter of basement would be the biggest job.

[Mameotron]

I've worked in a welding shop for the past 4 years (I'm friends with the owner- I still work some weekends!!) and I can't tell you how many transmission bell housings I've had to repair after someone smeared JB-weld in the crack.  It doubles the amount of time I have to spend on it, since I have to clean all that crap out.  It never holds.  Maybe bacause the housings are aluminum?

Anyway, we keep a tube of it around the shop, and we do use it here and there.  It works great in the right applications.

[GameDork]

When I ws younger, I made a Spud Cannon and went the slacker route and installed one of those long fireplace lighters (the clicky ones) in the pvc intead of running a grill lighter in there.

I drilled a hole at 45deg just a little bit bigger than the lighter, held the lighter in place while my cousin smeared the JB Weld all around it.

It worked like a charm, we could blow potatos hundreds of feet down the road and the JB didn't care.

[MoonDog]

I used it to glue rocks to a concrete wall to create an artificial rock climbs.  The concrete wall was the supporting structure for a road overpass.  We needed something that could provide enough support with small surface area with a high degree of safety.  Someone recommended using auto body repair bondo instead since it's a heck of a lot cheaper.  Not always the best idea to go cheap when your life is on the line, but it seemed to work just as well.  

[photorock]

           I fixed a 1/2" hole in my basepan once with it. Worked like a charm.

[Martoon]

When I ws younger, I made a Spud Cannon and went the slacker route and installed one of those long fireplace lighters (the clicky ones) in the pvc intead of running a grill lighter in there.

I drilled a hole at 45deg just a little bit bigger than the lighter, held the lighter in place while my cousin smeared the JB Weld all around it.

It worked like a charm, we could blow potatos hundreds of feet down the road and the JB didn't care.

Ahh, the old spud cannon (*sigh*).  I remember loading it with apples back in college, and making instant applesauce on the dorm walls.

[daeven]

I wiped out on my motorcycle and ground a hole in the alternator cover 700 miles from home.  I JB Welded the hole and planned to use it the next day (and certainly could have).  Fortunately I was able to borrow the same part from an Internet list friend so I didn't need it!

I have heard that cracked engine blocks can be repaired with JB Weld, so it is amazing stuff.

[Mameotron]

Ahh, the old spud cannon (*sigh*).  I remember loading it with apples back in college, and making instant applesauce on the dorm walls.

http://www.lindsaybks.com/bks4/ballis/index.html

For those of you who have only dreamed of building the spud cannon.

[RandyT]

I have a 21" Trinitron monitor (about 100 lbs) that had a broken tilt swivel base.  It was in two separate pieces.

I used a tube of the Epoxy putty (maybe not JB weld, but very close).  It looks like crap, but it hasn't even hinted at cracking in over 4 years.

I also used it to repair a hinge on an Encad 36" printer lid.  I didn't think it would hold, but I now think it's stronger than the original part.

Not the biggest, but lots of stress.  The world is a better place because of it

RandyT