I can't remember for sure right at the moment, but I think the bolts for the fan to water pump flange are 6 x 50. I remember using them to install the pins on reassembly as I didn't want to tap on the pin directly.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.