Quote:
Originally Posted by engatwork
I did not clean the spark plug threads in the head so that may very well be the issue. I've returned the three worthless plugs to BMW and have received three new plugs to try next time car is in. I'll make sure I clean the threads up.
It looks like they have redesigned the drainage tray at the windshield wiper to keep water off of the last couple of cylinders. Looks like a good design but it looks like it is still that BMW worthless plastic type material that will fall apart after a few years.
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I have found that usual butyl tape works great to seal the rain trays there. The new design with the huge rubber gaskets is nice and apparently has more fiber in the resin mix, but it will fail eventually.
I also sealed my E70 rear inboard tail lamps with butyl tape as the foam tape that BMW used doesnt work. butyl tape with some heat from a hair dryer and its good as gold.