"To determine if your M97 engine has the improved IMS, you will need to check your engine number.
if the engine number is 68509790 and below, unfortunately it still has the smaller removable IMS bearing.
if the engine number is 68509791 and above, it will have the new large single row IMS. The IMS cover also has the 22mm nut.";
gevonden:
http://forums.rennlist.com/rennforums/997-forum/680972-06-s-owners-whats-your-engine-number-and-production-date.htmlMvg,