Diagnostic Routine A

Diagnostic Routine A

Diagnostic Overview

Loss of Coolant

Normal Operation and Fault Conditions

The engine cooling system is a closed system providing for coolant expansion and contraction as well as changes in pressure as coolant warms and cools with engine operation. Various gaskets, seals, hoses and clamps contain coolant within the cooling system and keep other fluids and contaminants from entering the cooling system.

Coolant loss can be attributed to external or internal leaks anywhere within the cooling system, including:

- Coolant hoses or tubes

- Hose clamps

- Thermostat housing

- Thermostat housing O-ring seals

- Coolant inlet connection

- Coolant inlet connection O-ring seal

- Coolant inlet pipe

- Coolant inlet pipe O-ring seals

- Coolant pump gasket

- Radiator

- Pressure relief cap

- Coolant pump

- Oil cooler (may leak internally or externally) (if equipped)

- Heater core

- Engine gaskets (may leak internally or externally)

- Degas bottle

- Cylinder block core plugs

- Cylinder head core plugs

- Block heater (if equipped)

- Turbocharger- 2.0L GTDI (Gasoline Turbocharged Direct Injection)

REFER to System Diagram .

Special Tool(s)






Material(s)

NOTICE: The cooling system is filled with Motorcraft(R) Specialty Green Engine Coolant or. Always fill the cooling system with the manufacturer's specified coolant. If a non-specified coolant has been used the cooling system must be chemically flushed. REFER to Cooling System Flushing . Failure to follow these instructions may damage the engine or cooling system.

NOTICE: Use Motorcraft(R) Specialty Green Engine Coolant or. Use the same type of coolant that was originally used to fill the cooling system. Do not mix coolant types. Mixing coolant types degrades the coolant corrosion protection and may damage the engine or cooling system.

NOTICE: Motorcraft(R) Specialty Green Engine Coolant is very sensitive to light. Do NOT allow this product to be exposed to ANY LIGHT for more than a day or two. Extended light exposure causes this product to degrade.

NOTE: During normal vehicle operation, may change color from orange to pink or light red. As long as the engine coolant is clear and uncontaminated, this color change does not indicate the engine coolant has degraded nor does it require the engine coolant to be drained, the system to be flushed, or the engine coolant to be replaced.






Pinpoint Test

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.

1. CARRY OUT INSPECTION AND VERIFICATION

1. Carry out Inspection and Verification. REFER to Symptom Chart(s) Symptom Related Diagnostic Procedures.

Were any concerns found?






2. CHECK THE ENGINE COOLANT LEVEL

NOTE: Allow the engine to cool before checking the engine coolant level.

1. Ignition OFF.

2. Visually inspect the engine coolant level at the degas bottle.

Is the engine coolant level within specifications?






3. PRESSURE TEST THE ENGINE COOLING SYSTEM

1. Pressure test the engine cooling system. REFER to Cooling System Pressure Test Cooling System Pressure Test.

Does the engine cooling system leak externally?






4. CHECK THE ENGINE COOLANT FOR AN INTERNAL LEAK

1. Inspect the engine coolant in the coolant expansion tank for signs of engine oil.

Is engine oil evident in the coolant?






5. CHECK THE ENGINE OIL FOR COOLANT

1. Remove the oil level indicator from the engine.

Is coolant evident in the oil?






6. CHECK THE COOLING SYSTEM FOR COMBUSTION GASES

1. Using 105R0110 (-) , following the instructions supplied with the tester, check the coolant for combustion gases.

Are combustion gases present?