did my coolant change to the 95 525i open up a hole cans of worms lol car over heats and has no heat at all . it will idle for 15 20 min and not over heat so from what i read its the thermostat changed that still no heat and over heating so i guess the water pump is suspect now i nkow it was changed several years ago before i bought the car that was at 60,000 miles itd got 115,000 now . when i tried to bleed the system nothing but steam would come out ; i have looked in the radiator and there is very little movement. any body have any ideas ? water pump?