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Uhhgg..
#1 BMW starts to overheat while driving it for around 10 minutes.
#2 Check the engine bay the next day.
#3 Find that the nipple on the cooling reservoir is cracked and obviously leaking.
#4 Replace the part and it is still overheating.
#5 Find a sensor hanging and return it to the housing of the fan between the engine and radiator. (Apparently listed as an AC cooling sensor or something in parts stores)
#6 After a few 5 mile runs the temperature then would rise to the white line to the right just for a few seconds, and then come back down to normal. (It would only rise twice on a run, so we figured the sensor had something to do with it)
#6 I then noticed that the reservoir level had dropped, and we didn't know where the leak was.
#7 We then found that the glue used on the reservoir didn't seal all the way around and was leaking.
#8 I have another reservoir now and I am going to install it again today.
Could the reservoir alone be leaking half of the reservoirs coolant in one day alone?? Or could it be in combination with another leak??
Could that sensor be the reason that it was overheating?? (I guess I will find out after the leak is fixed..)
-Nathan
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