Coolant - Service Level Check

The cooling system is closed and designed to maintain coolant level to the top of the radiator.
When servicing requires a coolant level check in the radiator, the engine must be off and not under pressure. Drain several ounces of coolant from the radiator draincock while observing the Coolant Recovery System (CRS) Tank. Coolant level in the CRS tank should drop slightly. Then remove the radiator cap. The radiator should be full to the top. If not, and the coolant level in the CRS tank is at the MIN mark there is an air leak in the CRS system. Check hose or hose connections to the CRS tank, radiator filler neck or the pressure cap seal to the radiator filler neck for leaks.