my bmw 528i goes up to the hot area and says it is over heating yet when i feel the hoses and the top eng. covers, not like it should be, if hot . seems real safe.where to start on diagnostic
Let it cool down and open the cap to the expansion tank and see if the coolant is at the proper level. I sususpect your low on coolant. If it is really low, perform the bleeding procedure by removing the bleeder screw and the heat on....http://www.pelicanparts.com/BMW/techarticles/BMW-5-Series-E39/57-WATER-Cooling_System_Filling_and_Bleeding/57-WATER-Cooling_System_Filling_and_Bleeding.htm
Might also be a failed thermostat.
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