F30 335i leaking oil

[Jcruz559]

I have a 2013 f30 335i, I changed the valve cover gasket after I noticed there was oil leaking into my down pipe right where the o2 sensor is. Anyone have an idea what else it could possibly be ?? I checked the valve cover itself as well, looks straight not warped.

[MarcoZandrini]

I think your valve cover is still leaking. But, drive it for a week to see if the oil goes away. It may be residual oil.

[jclausen]

I would recheck the work, get a flash light and a mirror

[White94RX]

Yep. Recheck your work. It's very easy to have the gasket come out of the valve cover when reinstalling. All of us use mirrors and a flashlight to ensure the gasket stays in place. Many tech's use some spray adhesive in the channel of the valve cover to help hold the gasket in place during installation.