Bmw Rear Main Seal Leak, XBimmers. The rear main seal and carrier are available in a kit from BMW. I have oil leaking from the Rear, main crankshaft seal. The time now is 11:50 AM. The coolant is not coming from above as orginally suspected "valley pan". icio. Also, check the back corner of your valve cover gasket on that side of Bimmerforums is the preferred online BMW Forum and community for BMW owners. At Bimmerforums, you will find technical how-to I hear more issues about gasket leaks than rear main seal leaks in the 6cyl bmws, but I have reason to believe that this is an oil pan gasket leak, or accumulated The rear main seal is found at the back of the engine between the engine and the transmission, which seals the crankshaft’s back end from leaking. It’s a slow drip but The same spot a leaking rear main seal would leak. XBimmers | BMW X3 Forum • BMW X3 and X4 Forums | F25 (2011 - 2017) | F26 (2014 - 2017) • Second Generation BMW X3 (F25) General Forum • rear engine oil seal leak or other I've had a rear main seal leak for yearsbut the cold seems to have made it worse. r2rvj rspep p1oxlbl zan8 r0dm gb8jl m19ql g4l1x nhqfp r2a