TheSamba.com :: View topic - use JB WELD to fix hole on intakr manifold?

Thu Apr 30, 2009 1:27 pm

I have a small hole on my intake exhaust and wanted to know if I could use JB weld to patch it up?

Thu Apr 30, 2009 1:29 pm

eth727 wrote: I have a small hole on my intake exhaust and wanted to know if I could use JB weld to patch it up?

Not completly understanding where the leak is.

Is it on the intake manifold or the exhaust manifold? Is it on aluminum or steel sections?

Thu Apr 30, 2009 2:17 pm

either way, just weld it. A friend of mine was contemplating how to install MAP sensor on aluminum pipe, checked first shop and it was $10 to tig weld a bung to a pipe.

JB weld is just silly.

Thu Apr 30, 2009 3:53 pm

I used JB weld on the head on my Jeep. When you do a 4.0 head conversion on a 4.2 engine you need to fill the water jacket holes. It has been going for over 60k miles and no problems. They have high temp JB weld now and it will work just as well. Be sure to use some tape or playdough for a mold so it doesn't drip anywhere you don't want it. You can also sand or grind it after it is dry for over 24 hours.

Thu Apr 30, 2009 6:23 pm

JB Weld is a decent product, and works surprisingly well in a pinch. Prep and allowing proper dry time is key.

Thu Apr 30, 2009 6:48 pm

A friend of mine used it on a broken Scat Trak IDA manifold between elimination rounds at the drag strip. He went on to win that class that night.

Thu Apr 30, 2009 8:10 pm

How small of a hole are you talking about and is it on a relatively flat surface? If you want to avoid welding it you can drill it, tap it and put a pipe plug in it for an air tight seal.

Thu Apr 30, 2009 8:50 pm

I had a few pin holes in my manifolds(from porting)and I JB welded them. Its been working for a few thousand miles. If I had the time I would had tig'd them but I was in a hurry.

Thu Apr 30, 2009 8:58 pm

hkoch wrote: I had a few pin holes in my manifolds(from porting)and I JB welded them. Its been working for a few thousand miles. If I had the time I would had tig'd them but I was in a hurry. I got about 10,000 miles before my blob of JB weld above the port vibrated off and I sunk a valve seat due to the vacuum leak. :cry:

Thu Apr 30, 2009 9:53 pm

stealth67vw wrote: hkoch wrote: I had a few pin holes in my manifolds(from porting)and I JB welded them. Its been working for a few thousand miles. If I had the time I would had tig'd them but I was in a hurry. I got about 10,000 miles before my blob of JB weld above the port vibrated off and I sunk a valve seat due to the vacuum leak. :cry:

You didn't notice that you had a vacuum leak?

Thu Apr 30, 2009 10:04 pm

fastinradford wrote: stealth67vw wrote: hkoch wrote: I had a few pin holes in my manifolds(from porting)and I JB welded them. Its been working for a few thousand miles. If I had the time I would had tig'd them but I was in a hurry. I got about 10,000 miles before my blob of JB weld above the port vibrated off and I sunk a valve seat due to the vacuum leak. :cry:

You didn't notice that you had a vacuum leak? Yeah I noticed it. I commuted the car 90 miles day and by the time I got home it was popping back through the barrel and then I had zero lash adjustment.

Fri May 01, 2009 4:44 am

For the JB weld fans,

You can add 50% or more of filings
(from a similar metal you are patching),
to your mix.

This makes a general strength, finishing, heat conduction and
expansion characteristic improvement all around!