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Discussion Starter · #1 ·
Yesterday I filled the coolant after having the car apart for some time and as soon as I turned the ignition on the low coolant level light came on. I believe I bled the coolant system correctly. The thing is that I did it for the first time on my car and some junk came out of the radiator when I drained it - maybe some stuff that was supposed to fix minor leaks? Could the problem be that some of that stuff clogged down in the ET and the sensor thinks that the coolant is low because of it? I could not think of anything else that could be wrong.
Thanks for any advice.
 

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2004 325i
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Honestly what I would do is let the car fully cool down, remove the ET cap and check the coolant level, I would also open the bleeder screw a little to let the pressure out to see if the coolant in the ET drops or not, if it does drop, there is probably air in the system, if there is, go ahead and re bleed
 

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I would also open the bleeder screw a little to let the pressure out to see if the coolant in the ET drops or not, if it does drop, there is probably air in the system, if there is, go ahead and re bleed
Don't do this. As soon as the bleeder is opened coolant will flow back into the ET and overfilled it, then you have to bleed again.
 

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Yesterday I filled the coolant after having the car apart for some time and as soon as I turned the ignition on the low coolant level light came on
with cold engine, open the ET cap and see if the coolant level is between MIN and MAX. If yes then check the sensor connection or try to swap out with the windshield tank sensor.
 
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