- Remove all 6 spark plugs. BTW, I use NGK Iridium if you want to search forum for that.

- Place a rag in each spark plug hole (to prevent the mess), then do a few quick cranking (2-3 sec each time) to expel the oil from the cylinders.

- Then do compression test in each cylinder, hopefully you didn't blow the head gasket or worse bent a rod.

- If nothing abnormal, then do the CCV overhaul (info in forum): basically new Oil Separator, and all associated hoses.

- Don't forget to add oil later.

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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT