coolant reservoir is never used by the system
I noticed that the coolant reservoir never has any inflow or outflow of coolant. I checked the radiator cap and the spring seems to be working fine meaning that at 1.1 bars or pressure the cap should open and release coolant to the coolant reservoir. I wonder why it never happens (in my case)...? Is it because the coolant temperature never reaches high enough temp to reach 1.1 bars or pressure? When in traffic, I hear my fan spinning, so I know the cooling system works fine.
Do you guys see the coolant reservoir level go up and down?