Ok, so when my Boxster is cold and I'm starting off from a start sometimes I can feel and hear a clunking noise coming from the engine compartment. I then have to feather the clutch a little for it to stop. When the engine is warm it doesn't seem to do this. Also I noticed after a decent drive when parked on an incline I get a little oil leakage, but not when parked on level ground or park on a decline. Any thoughts?