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Engine Cooling System - 2.0L: Other Ford C-MAX II

Cooling System (Mechanical) 5 illustrations ~743 words

Cooling System Pressure

Cooling system pressure test145 kPa (21 psi)
Radiator pressure test (removed from vehicle)138 kPa (20 psi)

Thermostat Opening Temperature

Starts to open82°C (180°F)
Fully open94.5°C (202°F)

Scheme 31

Scheme 31: FHEV
Scheme 31: FHEV
ItemPart NumberDescription
118B539Heater core
218C266Heater hose assembly
35G232Exhaust manifold and converter assembly
48A577Cylinder block coolant pump hole cover assembly outlet hose
58100Pressure relief cap
68K218Degas bottle
78B273Lower radiator hose
86010Cylinder block
98B593Cylinder block coolant pump hole cover assembly
106051Cylinder head gasket
116090Cylinder head
128A265Coolant outlet connector adapter assembly-to-degas bottle hose and connector
138K556Coolant outlet connector adapter assembly
149D475Exhaust gas recirculation (EGR) valve
1518K580Heater outlet hose assembly
168B274Upper radiator hose
178005Radiator
188A586Thermostat housing
198C419Coolant pump
208A567Coolant pump inlet hose
218W005Radiator-to-degas bottle hose
228B555Coolant pump outlet hose

PHEV

ItemPart NumberDescription
118B539Heater core
218D476Heater coolant control valve inlet hose
318C266Heater hose
418648Heater coolant control valve-to-engine hose
518C310Heater coolant control valve and bracket assembly
618D481Heater coolant control valve outlet hose assembly
718K579Heater inlet hose assembly
818K463Positive temperature coefficient (PTU) heater assembly
918N325Heater coolant pump-to-PTU heater assembly hose
1018D473Heater coolant pump
1118K479Heater outlet hose
128A567Heater coolant pump inlet hose
136010Engine block
148A577Coolant pump outlet connector hose
158B539Cylinder block coolant pump hole cover assembly
166051Cylinder head gasket
176090Cylinder head
188B555Coolant pump outlet hose
198C419Coolant pump
208A567Coolant pump inlet hose
218A586Thermostat housing
228B273Lower radiator hose
2318K218Degas bottle
248100Pressure relief cap
258075Radiator-to-degas bottle hose
268K556Coolant outlet connector adapter assembly
279D475Exhaust gas recirculation (EGR) valve
288A365Coolant outlet connector adapter assembly-to-degas bottle hose and connector
2918K580Heater outlet hose assembly
308B274Upper radiator hose
318005Radiator

Fail Safe Cooling

A strategy called Fail Safe Cooling is built into the PCM that will control the engine if it starts to overheat.

Stage 1 of the strategy commences if the engine starts to overheat. The CHT sensor transmits a signal to the PCM , which moves the temperature gauge pointer into the red zone.

If the engine is not switched off and the temperature continues to rise, the Powertrain Check Lamp is illuminated. This indicates to the driver that the engine is approaching critical limits and should be stopped. At this point DTC P1285 is set in the PCM which can be retrieved using a scan tool.

Stage 2 of the strategy commences if the lamp and temperature gauge are ignored by the driver. The PCM will start to control the engine by cutting out 2 cylinders and restricting the RPM to below 3, 000 RPM. Simultaneously the MIL illuminates. This indicates that long term engine damage can occur and vehicle emissions will be affected. At this point DTC P1299 is set in the PCM which can be retrieved using a scan tool.

Air is drawn into the deactivated cylinders. This helps to control the temperature of the engine internal components. The deactivated cylinders are alternated to allow even cooling of all the cylinders.

Note. If the driver is using a high percentage of throttle travel (for example, an overtaking maneuver) when the PCM starts engine deactivation (Stage 2), the deactivation will be delayed for 10 seconds.

Note. After 2-cylinder operation has begun, the engine will not revert to 4-cylinder operation, even if the temperature should fall, until the ignition is switched off and then on again.

Note. The MIL can only be extinguished by using a scan tool after the fault has been rectified and the DTC cleared.

Stage 3 of the strategy will commence if the engine temperature continues to rise. This results in the engine being totally disabled before major engine damage or seizure occurs. The Powertrain Check Lamp will begin to flash, indicating to the driver that the engine will be switched off after 30 seconds. This allows the driver time to choose a suitable parking place.

SPECIAL TOOL DESCRIPTIONS 3-Way HD Antifreeze Coolant Test Kit 328-2050-62291 or equivalent Coolant/Battery Refractometer 300-ROB75240 or equivalent D-Gas Adapter 014-R1068 or equivalent Radiator Tester 014-R1072 or equivalent UView® Combustion Leak Tester UVU560000-R

Scheme 32

Scheme 32: Engine Cooling
Scheme 32: Engine Cooling

Scheme 33

Scheme 33
Scheme 33

Scheme 34

Scheme 34
Scheme 34

Scheme 35

Scheme 35
Scheme 35

Possible Sources

  1. Coolant hoses or tubes
  2. Hose clamps
  3. Thermostat housing
  4. Thermostat housing O-ring seals
  5. Coolant pump gasket
  6. Radiator
  7. Pressure relief cap
  8. Electric coolant pump
  9. Heater core
  10. Engine gaskets (may leak internally or externally)
  11. Degas bottle
  12. Heater coolant temperature ( ECT ) sensor
  13. Cylinder block core plugs
  14. Cylinder head core plugs
  15. Block heater (if equipped)
  16. Engine coolant outlet connector adapter
  17. Cylinder block coolant pump hole cover
  18. Exhaust manifold heat recovery tube
  19. PTC Heater
  20. Auxiliary coolant pump
  21. 3-way coolant valve
  1. Low coolant level
  2. External engine coolant leak
  3. Airlock in system
  4. Pressure relief cap installation
  5. Restricted airflow through A/C condenser/radiator
  6. Internal engine coolant leak
  7. Coolant condition/concentration
  8. Non-Original Equipment Manufacturer (OEM) engine enhancement components
  9. Electric cooling fan
  10. CHT sensor
  11. Radiator
  12. Thermostat
  13. Temperature gauge
  14. Electric coolant pump
  15. Coolant flow restriction
  16. Active grille shutter not operating correctly
  17. Missing or damaged airflow seals or ducts
  1. Low coolant level
  2. Thermostat
  3. Temperature gauge
  4. CHT sensor

Thermostat

Install a new thermostat only after at least one of the following tests and checks have been carried out

  1. Pinpoint Test B or C
  2. Thermostat Visual Inspection

Filling

Pinpoint Test D

D2 Plug-in Hybrid Electric Vehicle (PHEV)
  1. click to open the image
  2. Plug-in Hybrid Electric Vehicle (PHEV)
D3 All vehicles
  1. click to open the image
  2. All vehicles
D6 ROB75240 Coolant/Battery Refractometer (Fahrenheit)
  1. NOTE: Follow these steps when adding or topping off the engine coolant.

Bleeding

Pinpoint Test D

D11 For vehicles filled with the Vacuum System Filler:

Coolant Pump

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

Cooling Fan Motor and Shroud

Special Tool(s)/General Equipment

Cable Ties

Degas Bottle

Hose Clamp(s)
Hose Clamp Remover/Installer

SPECIAL TOOL DESCRIPTIONS

NameSpecification
Motorcraft® Orange Antifreeze/Coolant Prediluted (U.S.) VC-3DIL-B (U.S.)WSS-M97B44-D2

MATERIALS SPECIFICATIONS

Radiator

Special Tool(s)/General Equipment

Knife

Thermostat Housing

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

Heater Hoses

Special Tool(s)/General Equipment

Hose Clamp Remover/Installer

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