Cooling System Flow Check

To determine whether coolant is flowing through the cooling system, use one of the following procedures:

Preferred Method 

• Remove pressure cap when engine is cold. Remove small amount of coolant. Idle engine until thermostat opens. You should observe coolant flow while looking down the filler neck. Once flow is detected install the pressure cap. Replace removed coolant into coolant recovery container.

Alternative Method 

• If engine is cold, idle engine until normal operating temperature is reached. Feel the upper radiator hose. If it is hot, coolant is circulating.