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.

Visual Inspection Chart
^ Leaks
^ Damaged hoses
^ Loose/damaged hose clamps
^ Damaged water thermostat
^ Damaged head gasket
^ Damaged intake manifold gasket
^ Damaged water pump
^ Damaged radiator
^ Damaged degas bottle
^ Damaged heater core
^ 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. Symptom Related Diagnostic Procedures