Head gasket, not always
Just a little help for anyone that has had major head aches with "head gasket"
Started with the usual mayo in cylinder head. R56 N14 2008
Replaced gasket, checked head, did not look like it needed skimmed.
One month later after more mayo and 2 oil changes, still coming back. Not as thick but still present.
Decided to redo head gasket this time got head skimmed.
Exact same result. New bolts were used in both changes. Torqued correctly Correct oil used and not overfilled.
Studied engine diagram as 3 failures on gasket would be as much luck as winning the lottery. Only other place I could see oil / water possibly mixing is oil cooler.
Ordered gasket sets. M126.96.36.1997.009 and M188.8.131.527.010 (£31.61 for both) cleaned oil cooler and checked cooler and filter housing for cracks, all ok.
Replaced oil and coolant not a drop of mayo has appeared for the last 700 miles.
Dealer told me they have never ordered these gaskets before.
I can sleep again and drive car as it should be driven, with sport on.
Hope this helps anybody in same position.