i suggest that you take the flange off the drain, and tap the turbo for 5/8" NPT . hen put an 12-AN - 5/8 adator . and a 12AN 45 degree fitting.

carl

 

I'm going to be using a gslse front cover and drilling and tapping into that little hole that is already there (just needs to be drilled through). Can some one tell me what size hole to drill, what size tap to use and what kind of fitting to screw into the tap?

thanks

 

here: http://home.mn.rr.com/linnihan/turbo_oil_return.htm

they use a 45/64 drill and tap it for 1/2" nptf

carl.

 

Thanks! Nice site, too bad he doesn't have the other topics finished yet