Initial Inspection and Diagnostic Overview

1. Verify the customer's concern by operating the engine cooling system to duplicate the concern.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:
Mechanical
^ Damaged hoses.
^ Loose/damaged hose clamps.
^ Damaged water thermostat.
^ Damaged head gasket.
^ Damaged intake manifold gasket.
^ Damaged water pump.
^ Damaged radiator.
^ Damaged radiator coolant recovery reservoir or degas bottle.
^ Damaged heater core.

Electrical
^ Circuitry open/shorted.
^ Damaged constant control relay module.
^ Damaged cooling fan motor.
^ Damaged pusher cooling fan motor.
^ Damaged powertrain control module (PCM).

If coolant condition is satisfactory, check coolant concentration for proper protection level as described under Coolant Condition Check.

If concentration level is low, partially drain the cooling system by opening the radiator draincock (8115) or partially removing the lower radiator hose (8286). Secure the radiator draincock or hose clamp and add 100 percent concentration of Premium Cooling System Fluid E2FZ-19549-AA or -B (in Oregon, F5FZ-19549-CC, recycled coolant or equivalent meeting Ford specification ESE-M97B44-A to obtain the recommended protection level. Wet the rubber sealing surface of the pressure relief cap before installing the pressure relief cap.

3. If inspection reveals obvious concern(s) which can be readily identified, service as required.
4. If the concerns remain after the inspection, determine the symptoms and go to the Symptom Chart.