Ceramic Epoxy Putty for Manifold Cracks?
 

Hi Everyone,

I found a small hairline crack/leak on my turbo manifold. I think it's thermal-expansion related, and not a structual related crack.

I'll take some pictures when I get home tonight, but it sorta looks like this. I have a cast-iron manifold that looks to be the same design as begi or FM. I can't tell where it came from. Last owner installed it. T25 turbine inlet flange.

Question: Anyone tried using this ceramic-based exopy putty for exhaust manifold?

They even have a picture of an exhaust manifold on it.

I am looking for a good temp solution for the rest of the season. I am planning to take it off this winter and give it to a buddy to weld. He has some experience welding cracked DSM manifolds. (grind out crack, pre-heating, welding, controlled cooling)

by thermosteel you mean weld right??



it wont hold....i promise. it will turn white and flake off.

try it, tell us how it works

fixt :giggle:

I'm pretty sure that's the same product I tried on an exhaust leak back towards the muffler on my Z32. I wasn't impressed. It was worthless near the muffler. I can't see it lasting very long on a manifold.

yeah, i'll just eat the downtime and get it welded.

If i use it temporary, i'll probably have to waste a lot of time cleaning it off later, so it doesn't contaminate the welds.


Side question: will an exhaust leak pre-O2 sensor mess the reading up?

Yes.

fresh air is going to make the WB think you're running leaner than you actually are.

I had a loud exhaust leak on my old jeep and I used that stuff to fix the crack in the manifold. The stuff only lasted a day before turning white and flaking off but it was long enough to pass my state's vehicle inspection.

like i said

So air will enter the exhaust at the leak? At which conditions does this happen?

At idle, exhaust is definitely exiting the leak because I can feel it.

When you're in reverse, of course.