Cooling System Flow Check

DIAGNOSIS AND TESTING - COOLING SYSTEM FLOW CHECK
To determine whether coolant is flowing through the cooling system, use the following procedure:

WARNING: DO NOT REMOVE THE COOLING SYSTEM PRESSURE CAP OR ANY HOSE WITH THE SYSTEM HOT AND UNDER PRESSURE BECAUSE SERIOUS BURNS FROM COOLANT CAN OCCUR.

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