BMW M5 Forum and M6 Forums banner


  1. E39 M5 and E52 Z8 Discussion
    I just replaced my valve cover gaskets 2 months ago. The car seemed to improve and no SES light for 400 miles. Then, everything went back to the way it was, except that my rough idle when cold was about 90% better. I removed the plenum to try and locate a vacuum leak yesterday and did not find...