Inspection and Verification
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
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.
NOTE:
The engine cooling system is filled with Motorcraft ® Orange Antifreeze/Coolant. Always fill the cooling system with the manufacturer's specified coolant. Chemically flush the cooling system if a non-specified coolant has been used. Refer to Cooling System Flushing . Failure to follow these instructions may damage the engine or cooling system.
NOTE:
The engine cooling system is filled with Motorcraft ® Orange Antifreeze/Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of Motorcraft ® Specialty Orange Engine Coolant.
NOTE:
During normal vehicle operation, Motorcraft ® Orange Antifreeze/Coolant 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.
- 4.
Record any cooling system DTCs retrieved. Refer to the DTC Chart in this article for DTC descriptions.
- 5.NOTE: Take note of any coolant odor or steam coming from cooling system components.
If the system coolant is filled correctly and no DTCs associated with fail-safe cooling are retrieved, verify the customer's concern by operating the engine to duplicate the condition.
- 6.NOTE: Refer to the coolant flow diagram in Engine Cooling .
Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
| Mechanical | Electrical |
|---|---|
| Leaks or weeps at: Hoses Tubes Clamp joints Gaskets O-rings Thermostat housing Radiator Pressure relief cap Coolant pump Heater core (wet floor or coolant odor in vehicle) Coolant crossover manifold assembly Oil filter adapter (if equipped) Oil cooler (if equipped) Degas bottle Cylinder block core plugs Cylinder head core plugs Block heater (if equipped) Turbochargers |
Inoperative or damaged: Wiring, connectors or PCM Electric cooling fan Cylinder Head Temperature (CHT) sensor |
| Cracked or damaged: Hoses Tubes Hose clamps Thermostat housing Radiator Pressure relief cap Cooling fan Coolant pump Degas bottle Oil filter adapter (if equipped) Oil cooler (if equipped) Coolant crossover manifold assembly Cylinder block core plugs Cylinder head core plugs Block heater (if equipped) Turbochargers Restricted airflow through the A/C condenser/radiator Drive belt loose, worn or installed incorrectly Broken or weak drive belt tensioner Excessive white or light gray exhaust smoke (may have burnt coolant odor) Coolant in engine oil Engine oil in coolant Coolant in automatic transmission fluid Automatic transmission fluid in coolant |
? |
- 7.
If the inspection reveals an obvious concern that can be readily identified, repair it as necessary.
- 8.
Inspect the coolant condition.- 1.
Inspect the coolant color.- Discoloration may indicate that incorrect coolant may have been added to the system. Use of incorrect (green or yellow in color) coolant degrades the corrosion protection of Motorcraft ® Orange Antifreeze/Coolant. Addition of Motorcraft ® Specialty Green Engine Coolant may cause the color to appear to be a murky green-brown color. The addition of Motorcraft ® Premium Gold Coolant, however, may not change the color or appearance of the orange colored coolant. Detection of contamination with Premium Gold Engine Coolant is determined by the presence of nitrite. If contamination with Motorcraft ® Premium Gold Engine Coolant is suspected, test the coolant with the 3-Way HD Antifreeze Coolant Test Kit. Follow the nitrite testing directions in the kit to determine if nitrite is present in the system. If nitrite is present, flush the system and refill with the correct mixture of distilled water and Motorcraft ® Orange Antifreeze/Coolant. Refer to Cooling System Flushing .
- A darker orange with the presence of debris could indicate a commercially available stop leak may have been used and could result in loss of coolant flow to critical parts of the engine. If sediment is present in the coolant sample, flush the system and refill with the correct mixture of distilled water and Motorcraft ® Orange Antifreeze/Coolant. Refer to Cooling System Flushing .
- A light or reddish brown color indicates that rust may be present in the cooling system. Flush the system and refill with the correct mixture of distilled water and Motorcraft ® Orange Antifreeze/Coolant. Refer to Cooling System Flushing .
- An iridescent sheen on top of the coolant could indicate a trace of oil is entering the system. For engine diagnosis, refer to Engine System General Information . Flush the cooling system and refill with the correct mixture of distilled water and Motorcraft ® Orange Antifreeze/Coolant. Refer to Cooling System Flushing .
- A milky brown color may indicate that engine oil is entering the cooling system. Pressure test the cooling system. Refer to the Component Tests . If engine oil is suspected, the cause of the leak may be internal to the engine. For engine diagnosis, refer to Engine System General Information . Flush the cooling system and refill with the correct mixture of distilled water and Motorcraft ® Orange Antifreeze/Coolant. Refer to Cooling System Flushing .
- 2.
If the engine coolant appearance is acceptable, test the engine coolant freezing point range with the Coolant/Battery Refractometer. The freezing point should be in the range -50 °C to -26 °C (-58 °F to -15 °F). If the vehicle is driven in cold climates less than -37 °C (-34 °F), it may be necessary to increase the coolant concentration to get adequate freeze protection. Recommended coolant concentration is 48/52 to 50/50 (freeze protection -34 °C to -37 °C [-30 °F to -34 °F]) engine coolant to distilled water.- Maximum coolant concentration is 60/40 for cold weather areas.
- Minimum coolant concentration is 40/60 for warm weather areas.
- 3.
Adjust coolant range and level if necessary:- If coolant is low, add Motorcraft ® Orange Antifreeze/Coolant Prediluted.
- If the engine coolant tests too weak, remove some of the engine coolant and add Motorcraft ® Orange Antifreeze/Coolant Concentrated until the readings are within acceptable levels.
- If the engine coolant tests strong, remove some of the engine coolant and add distilled water until the readings are within acceptable levels.
- 1.