Quote Originally Posted by Rob
No, the 525i's don't have that line going to the Rad tank. Wish it was that simple. Thanks for the help anyway. Appericated!
Yes the overflow tank is on the side on a 525. Some people use a pencil with the fan, its not a terribly reliable test and risky so I think the paper sounds the best approach to get a rough idea. The clutches do need to be changed, I renewed mine as it had never been done, but the old one was just fine anyway. Make sure you bled the car properly, ie by doing it first when cold and not running; just by letting the fluid through the bleeder until it spits only clear coolant. That's how it is on the M30 with the overflow tank above the motor- so check the reccommended procedure for your motor is- a lot of peeps on here are confused about bleeding, best to go by the Bently Rob.