E46Fanatics - View Single Post - E46 COOLING SYSTEM GUIDE - overheating/coolant/etc
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Old 09-18-2012, 05:22 PM   #559
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Join Date: Sep 2011
Location: New York
Posts: 9,481
My Ride: '04 330Ci
Originally Posted by joegr View Post
The water level sensor in the expansion tank goes into an air cavity that is separate from the coolant area of the tank. There's no seal on the sensor and you can remove it without any coolant coming out.
Your information supplied is exactly correct. The coolant level sensor just twists to lock in.
It is incorrectly called a temperature sensor in the previous posts. Unless he is talking about the transmission cooler thermostat.
This is why it is important to be rigorous about using the correct terminology.
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