Hi I'm working on replacing the leaky gasket on the can chain tensioner (on the engine's rear bank) . My question is. How many O-Ring are there in the assembly? I see only one large O-Ring that goes around the outside of the base holder (that seals the collet assembly). However some pictures on this site seem to suggest that there are two O-Rings. http://www.ferrarichat.com/forum/attachment.php?attachmentid=1363490&stc=1&d=1311565839 I have a new O-Ring for the base holder, do I need another one? Thanks for any assitance. Image Unavailable, Please Login