I have a T3 that must be installed on a car I'm building a kit for. The center section has a 1/2" long crack on the side that oil weeps out of slowly. I tried just cleaning it and MIG welding it. That reduced the leak a bit. Now I am redoing it and I was able to just pop the whole patch off with a tap of the air chisel, horrible penetration. So I sandblasted the area clean and heated it up till it was orange and tried MIGing it again. Still leaks. Any suggestions?

 

What is the center section made out of and what filler were you using?

 

I believe cast steel and the filer is mild steel with 25/75 gas. It's been in contact with hot oil for over 14 years so i think it might just be too saturated to get a good bond with the filler. I hate to half-*** things but would any high temp adhesives work temporally?

 

if you can..drill a small hole at each end of the crack,then use high nicklewire (id use a stick welder) you may also have to gouge the crack a little...just a slight V shap in the crack and pass atleast two times over it...cast wlding is tricky and will not always works right..good luck...is your tuebo taken all apart?...are you rebuilding it?..i have 7 T3 turbos all bad..just hanging out here so if your rebuilding it and need a center give me a yell.............Hal

 

this is an assembled center with a 60trim compressor, i have to use it . I might chisle off the last try and try cleaning out the crack like suggested. I think when it heats up the oily smoke if getting in the weld... sucks that I have to use this turbo, oh well a dirty return line never hurt anyone...