Initial Inspection and Diagnostic Overview

1. Verify the customer concern by operating the engine cooling system.
2. Inspect entire cooling system for obvious signs of damage using the following chart:

Mechanical
^ Leaks
^ Damaged hoses
^ Loose/damaged hose clamps
^ Damaged water thermostat
^ Damaged head gaskets
^ Damaged intake manifold gasket
^ Damaged water pump
^ Damaged radiator
^ Damaged radiator coolant recovery reservoir
^ Damaged heater core Damaged fan/fan clutch

Electrical
^ Damaged engine coolant temperature sensor
^ Damaged engine coolant temperature sensor wiring

3. If the concern(s) remains after the inspection, determine the symptoms and go to the symptom Chart.