We've all Patched Something we Really Shouldn't With JB Weld?

But have you "cast" your own cylinder head in JB Weld? https://www.youtube.com/embed/587RuL45jS8

Yeah, but can it handle boost?

Should have tested to destruction.

thanks for sharing

That guy's my hero.

I've heard rumors before of people casting parts out of JB, but this is the first I've actually seen it done. I approve.

I can believe it. What's peak cylinder pressure in a flathead small engine? I doubt it's more than a few hundred PSI, BMEP in the double digits. And that would be at full load, not the high idle in the video.

I didn't know JBweld could conduct electricity

mad_machine wrote: I didn't know JBweld could conduct electricity

It's not, I had the same thought at first and was surprised as well. He got lucky, take a closer look at that spark plug washer. He used a big enough washer for the spark plug that it's arcing between that washer and one of the head bolts.

I wonder how that would scale...

I knew a guy with a 2 stroke 250 MX bike who gouged his cylinder wall, filled it in with JBW, honed it and got another season out of it.

I keep mine next to my duct tape and tube of Shoe Goo in my tool box.

bigdaddylee82 wrote:

mad_machine wrote: I didn't know JBweld could conduct electricity

It's not, I had the same thought at first and was surprised as well. He got lucky, take a closer look at that spark plug washer. He used a big enough washer for the spark plug that it's arcing between that washer and one of the head bolts.

ok, I thought that was just dirt or something at first. Now I see it was the spark jumping from the washer to the headbolt.

Hmmmmmm, I wonder.... any chance to add a ceramic coating to the chamber?? Would that hold up any better?

JB Weld was invented to seal up cracks in Flathead Fords that were allowed to freeze in the winter. This is just a little bit more involved usage