Today i learned theres a way toi do it witghout that took or taking cams out...
My BMW tech friend told me about it and hes seen it done.

Cylinder at TDC
Put shop air in the spart plug hole and KEEP IT THERE pumped so the valve closes then you can do the seals

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2003 4.6is

2004 E53 4.4i N62 http://i.imgur.com/nNNg5Qz.jpg http://i1238.photobucket.com/albums/...ps3xxtq5op.jpg
2007 E63 M6 S85 http://i.imgur.com/mSXK6ML.jpg
1984 Porsche 911 930 Turbo http://i.imgur.com/i9XUXOg.jpgg http://i.imgur.com/ZMGou51.jpg
1983 E21 320i [Sold] http://i1238.photobucket.com/albums/...psfd905353.jpg