Changed my Vanos O-ring seals. Putting them back in was a PITA.

The smaller o-rings didn't seem that bad but the Big outer ones maybe a little as it took very little force to pop them out, possibly creating a vacuum leak. Didn't have any oil leaks around it though.

After cleaning and putting the new rings on, it took quite bit of force to push them back in but at least I know they are in there tight now.

No noticeable improvement was noticed, trying to see if this will help with the cold start random misfires.

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2005 Imola 4.8iS