1st Gen R53 Cooper S Most liked posts in thread: Oil Leak??

Take the front of the car off to reach the engine.

 

Yup, crank sensor will leak and collect dirt and oil down the front side of the block. Also, the PCV valve discharges right into the supercharger (light beige hose with red fitting on SC), and oil can leak out of the green upstream gasket at the low point. It's rare, though, because air and oil are constantly getting sucked up by the supercharger. Here's a picture of what a crank sensor leak at 85k looks like - look for the black plume on the block.

 

It's not bad, just have to put it in service mode and it's all right there in front of you.

 

This thread was very useful...

http://www.motoringalliance.com/forums/cooper-s/2797-oil-leaks-superchargers-etc.html

(BTW, I can't tell if the pictures are down or my work firewall is blocking them - hope they're still up!)

 

Pictures are still there, it is your pesky intrusive work firewall. :cryin: