My big "F" is used to hold the water pump pulley while the fan clutch is loosened or tightened. Works good, leaves what little room that is there for the fan clutch wrench.
C
Good idea. I remember taking the fan off my 93 318 when I had to replace the water pump and man was it a bugger without anything to hold the pulley. Finally got it using the impact method. Put my big ole wrench on it and smacked it 3 or 4 times with a 2 lb. sledge and it popped loose. Tightened it the same way. Not the ideal method but it worked.