When we bought my wife's 08 convertible there was some oil under the engine, but it wasn't too bad. The oil was nasty dirty and I put new Mobile One in it. Now less than 1,000 miles later there is oil all over the underside, and is dripping on the driveway It's really difficult to see anything around this engine because it's so tight, so I can't tell where it's coming from. What are the usual suspects?

 

The Crank Sensor O-ring is a $5 range part that is about dead center of the radiator and about 8" above the bottom of the oil pan. If I was a betting type person, I would look there first. On the back passenger side, the Oil Filter Housing has a gasket that with age can start dripping and of course the oil pan gasket. If the oil is coming from the area between the engine and the transmission, you could have a bad crank seal, similar with the opposite side by the crank pulley. The valve cover gasket is another possibility.

Can only suggest you put the car up on jack stands, clean the bottom of the engine off and then see where you have new oil.

 

if oil is on front of the oil pan its gotta be either the pan seal or more likely (all minis have this issue), the crank sensor seal.

 

Looks like you may need to also look at the oil cooler seals. The two square edged seals are good sources of leaks. That’s where a lot of the mess came from in my experience.

I just changed the the valve cover gasket and now watching to see if I need to do the oil housing next. Crank sensor, crank pulley seal, oil dipstick, camshaft sensor seal, oil pressure switch, and oil pan were already changed.

Like r53coop said, clean it up and see where the oil leads to. If you haven’t done the crankshaft sensor, start there first.

 

Front crnakshaft seal went on mine at 37K miles. Oil goes everywhere, up and down and drips from sump. DIY job if it is this and plenty info threads on here. Wheel off and shine a light onto the pulley, you'll see oil pooling at the bottom of the hub if leaking.
It would assist if you detailed you car model and miles? Justa or S, etc. As above for other sources of oil.

 

It's an 08 convertible S. I replaced the crank sensor o ring today, seems to be the source of the leak. Amazing that all that came out of a little o ring!

 

Have you cleaned/lubed your vert top parts?

 

I haven't. I'll have to look up how to do that!

 

Having the supercharger off makes the job allot easier. With the supercharger still on, removing the driver side SC horn and BPV makes an easier job as well.

And then when you have the BPV off, Detroit Tuned has their own BPV that changes the engage point of the supercharger. Gas mileage goes down depending on much your foot is on the gas, something the extra performance makes difficult not to.

 

wrong post