Oil under intake manifold

[deucescorner]

So my friend did my timing belt etc... and tune up.

He found little oil leak around the valve covers (common) but what I was more concerned to see was some oil right below the intake manifold.

He decided to clean the TB cause it has a little gunk. As he did that he noticed oil further back, where there was some kind of sensor(was covered in it) and all around that was some kind of oil residue. We hooked it up on the computer and no codes show up, everything came out ok.

Any ideas what it might be, i'm hoping it's nothing serious

[A62TURBO]

Are you using a k&n air filter?

[deucescorner]

Are you using a k&n air filter?

no, Mann Air Filter, why?

[A62TURBO]

Because the K&N filter uses oil and sometimes that flows through. When I took off my throttle body to clean it over the summer I looked inside the intake manifold and saw oil so it might be normal.

[deucescorner]

Because the K&N filter uses oil and sometimes that flows through. When I took off my throttle body to clean it over the summer I looked inside the intake manifold and saw oil so it might be normal.

I see.