I don't have a turbo... But having used the Blue RTV I can say it's utter crap. It will never fully cure(it's not intended to), so all it does is act like a heavy grease or something. I actually cannot think of an application on an engine you'd use it for. However, maybe it's good for marine applications where you want to keep water out, but not make a semi permanent seal?... No idea.

Blue=no uses for me. (and it sealing your rear diff is fine because it's still really viscous stuff so with a lot of surface area it'd work fine)

I've always used orange or ultra black.

Hope it works out for ya, little stuff like that it really annoying.

-Joshua

 

Copper RTV worked great!! I looked underneath where it used to be oily and now it is clean and dry........but oil is still leaking somewhere.

 

when my valley pan had a leak in the passenger corner of it i could not find where it was coming from. at night time with a flash light it appeared i could see a little path of oil running down the seam of the head. i followed it up and took a mirror out and sure enough, it was the valley pan leaking in the rear. not sayin thats your problem but its worth a check. glad to hear you got your first problem figured out!

 

Yeah thats what I thought it was at first, but now that is dry..