Question on the turbo's. When you grease them. Where does the old grease go to. Does the housing have a plug that you remove for the grease to come out of? Or does it come out of the shaft seals?
When welding aluminum. Make sure that there is no dirt or oil/grease on the joint. It's got to be clean. When you are done. Are you pressure testing the welds? Checking for leaks with Leak Check or soapy water?
I'm an old TIG welder.