8mm. Left is loose. Spray some PB around the area, on reinstall use some anti-seize.

Pick up a 300E (M103) fan clutch to save some of your cash for beers. It works fine. I've had mine on my SDL for a while now and since it's been 107°F+ here in Texas my temp has been holding fine.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]