Coolant Recovery System Check

The cooling system is closed and designed to maintain coolant level to the top of the radiator.
With the engine off and not under pressure, drain several ounces of coolant from the radiator draincock while observing the Coolant Recovery System (CRS) container. Coolant level in the CRS container should drop. Remove the radiator pressure cap. The coolant level should be full to the top radiator neck. If not, and the coolant level in the CRS container is at or above the MIN mark, there is an air leak in the CRS system. Check hose and hose connections to the CRS container, radiator filler neck or the pressure cap seal to the radiator filler neck for leaks.