I think the socket is a (edit) 13/16" or 21 mm and maybe an extension.
You can use that with a breaker bar and you wedge that first, then hit the ignition key a couple of times. That should bang the bolt loose.
But to retighten it, you will have to wedge the flywheel to keep it from turning. I think the bolt has to be tightened to 160 ft-lbs.
Post was last edited on Jan 07, 2014 10:54. Edited 2
times.