I drive a '95 M3 which I understand has a plastic impeller in the water pump, which is prone to failure around 40K miles (I've got 37K miles). To be on the safe side, I am getting it replaced by the dealer (which is NOT covered under warranty unless, "the car overheats, then we'll cover it").
My question is, what else do I need to get replaced in addition to the pump itself. I have been told that the thermostat and flush the cooling system (neither of which the dealership will do standard). What is the proper procedure. Thanks in advance,