What are these plastic parts floating in coolant tank?

[Rob175]

Hummm....not sure about the accuracy of that reply. Typically the sensor is NOT in the tank....rather it sits in a channel molded into the bottom of the tank. If it needs to be replaced it can be pulled without ever draining the tank. The sensor does not use a "float" inside the tank, it's purely an electro magnetic wired sensor. It DOES NOT SIT IN THE TANK

[particlewave]

Originally Posted by Rob175

Hummm....not sure about the accuracy of that reply. Typically the sensor is NOT in the tank....rather it sits in a channel molded into the bottom of the tank. If it needs to be replaced it can be pulled without ever draining the tank. The sensor does not use a "float" inside the tank, it's purely an electro magnetic wired sensor. It DOES NOT SIT IN THE TANK

It’s dead on accurate.

How do you suppose that sensor knows the coolant level? It can’t see it
The float tells the sensor the coolant level via a magnet in the float that the sensor “senses”.

[Rob175]

Respectfully disagree.....there is NO FLOAT in the coolant tank.....the senosr simply senses the fluid level by measuring resistance of liquid vs. air (or no liquid). Feel free to point out, on the diagram where the float or sender or magnet INSIDE the tank is.........answer, there isn't one, sorry!