i have a cast iron turbo manifold. i want to upgrade to external wastegate, but cannot not find the manifold that will fit my turbo with the external waste gate flange. i was wondering can i just weld a external wg flange onto my manifold??? this would be the cheaper way for me to do this instead of changing my whole set up.. will this work>?? how good will it hold.?? anyone done this before??

 

If done right, it will hold. I have done it a few times. Welding MILD (not stainless, don't want to mix stainless and cast iron from what I understand) steel to cast iron is actually easier than welding iron to iron.

When welding iron, you must take care to pre- and post-heat the iron. Weld in short (1" tops) sections then pick up the torch and heat the piece to allow heat to distribute evenly in the iron before continuing. If heat is distributed too unevenly, the iron will crack, even shatter, when it cools.

When I have welded cast iron, it has always been stick welding with cast iron electrodes. TIG is also possible. One of the TIG fillers is 85% Nickel. I have not used a TIG on cast, so I cannot say any more about that, but I have never had one of my cast welds break.

 

ok thanks a lot. i think im just going to take it to a professional to do it. just wanted to make sure if is possible

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Longitudinal &raquo;</TD></TR><TR><TD CLASS="quote">If done right, it will hold. I have done it a few times. Welding MILD (not stainless, don't want to mix stainless and cast iron from what I understand) steel to cast iron is actually easier than welding iron to iron.

When welding iron, you must take care to pre- and post-heat the iron. Weld in short (1" tops) sections then pick up the torch and heat the piece to allow heat to distribute evenly in the iron before continuing. If heat is distributed too unevenly, the iron will crack, even shatter, when it cools.

When I have welded cast iron, it has always been stick welding with cast iron electrodes. TIG is also possible. One of the TIG fillers is 85% Nickel. I have not used a TIG on cast, so I cannot say any more about that, but I have never had one of my cast welds break.</TD></TR></TABLE>

yup, tig will f up real fast from the sand that's in the iron (sand cast)

 

Oh, yeah, sand reminds me that you must clean the surface thoroughly. Grind to a nice, shiny surface. The dull bumpy part on the outside of a piece of cast iron is a casting skin that is loaded with impurities, including sand. Sand doesn't weld very well, and you WON'T be burning it away.

 

ok thanks again. i will make sure of that.