Oily corroded turbo mounting studs

Jeffman

Major
Jan 7, 2017
1,618
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Any thoughts as to what’s going on here? The turbo studs are oily and corroded.
2008 335xi, stock turbos, 71K miles, reasonably well-maintained by me since new.
DCD7A280-CE42-4B8C-ACC9-68A5C64160E8.jpeg
 

Slowagon54

Corporal
Aug 21, 2020
200
94
0
I think its copper. And to me it looks like its reacting to something. Are you washing your engine bay?
 

Jeffman

Major
Jan 7, 2017
1,618
1
628
0
They are copper. All original 13 year old car mostly garage kept in Pennsylvania. Perhaps leftover oil from recent leak?
 

rayrobot

Lurker
Jul 31, 2019
23
18
0
Ride
335xi
That looks very normal,. They are actually in very good condition compared to mine lol. I don't know why the nuts get to that condition though.