I changed my own oil on my 2004 Z4 3.0 for the first time. The filter in this car goes into a housing. I replaced the filter as well as the O ring that seals the cap. The O ring is failing to seal well and I'm getting a fairly signifcant leak. At first, it looked like I may have tried to screw the back cap on too tightly and caused the O ring to squeeze out a little and the oil was leaking from there. I opened it back up, reset the ring, and put it back with only firm but not tight pressure. After driving, the ring has another bulge to it and it's leaking again.
How tightly should this cap be on? Am I not doing something to seat the O ring correctly?
have the same problem?
Wednesday, October 14th, 2009 AT 8:46 AM