Opps also yea the fan clutch dont hahe a whole lotta toqure and you can stop it with your hand. Just did the thermostat on my 535is and still runnin on the hot side of the gauge.Bled system many times.flow seems to be good.The cluch fan seems a little week. I acadently hit while i was bleeding and IT stopped rite in my hand,is that normal or is it shot?it only seem's to cool down when the aux fan comes on. I have the bently on this car. I am just lookin for some addvise on where to start.