Since the coolant expansion tank is made of an opaque material, for checking the level of liquid in the system need to unscrew the screw plug in the upper tank of the radiator
(Fig. 10). The motor must be stopped at the same time, and its temperature should be above 50 ?� C in the expansion tank must be visible to the coolant. Before the advent of the first night frosts, check the antifreeze concentration (freezing temperature no higher than -30 ?� C) through the filler cap of the radiator expansion tank. For more information on this subject can be found in Sec. "Cooling system".
