Engine Cooling System (Except Hybrid): Other Lincoln MKZ I рестайлинг

Fail Safe Cooling

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

Note. After the cylinder deactivation operation has begun, the engine will not revert to operating on all cylinders, even if the temperature should fall, until the ignition is switched OFF and then ON again.

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

The vehicle has a strategy built into the PCM that will control the engine if it starts to overheat.

Stage 1 of the strategy will commence if the engine starts to overheat. The Cylinder Head Temperature (CHT) sensor transmits a signal to the PCM, which then 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 and can be retrieved using a scan tool.

Stage 2 of the strategy will commence if the lamp and temperature gauge are ignored by the driver. The PCM will start to control the engine by cutting out cylinders and restricting the rpm to below 3,000 rpm. Simultaneously, the MIL will be illuminated. This indicates that long-term engine damage can occur and vehicle emissions will be affected. At this point, DTC 1299 is set in the PCM and can be retrieved using a scan tool.

Air is then 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.

Stage 3 of the strategy will commence if the engine temperature still continues to rise. This will result 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.

2.5L

Note. Black arrows indicate hot, white arrows indicate cold.

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ITEM DESCRIPTION TABLE

3.0L

Note. Black arrows indicate hot, white arrows indicate cold.

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ITEM DESCRIPTION TABLE

3.5L

Note. Black arrows indicate hot, white arrows indicate cold.

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Material

MATERIAL SPECIFICATIONS TABLE

Thermostat

A new thermostat should be installed only after the following tests and checks have been carried out

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

MATERIAL SPECIFICATIONS TABLE

MATERIAL SPECIFICATIONS TABLE

1. To remove rust, sludge and other foreign material from the cooling system, use cooling system flush that is safe for use with aluminum radiators. For additional information, refer to «SPECIFICATIONS»(ref-355972-S42576228682010013000000) . This cleaning restores cooling system efficiency and helps prevent overheating. A pulsating or reversed direction of flushing water will loosen sediment more quickly than a steady flow in the normal coolant flow direction. In severe cases where cleaning solvents will not clean the cooling system efficiently, it will be necessary to use the pressure flushing method using cooling system flusher. Dispose of old coolant and flushing water contaminated with antifreeze and cleaning chemicals in accordance with local, state or federal laws.
2. Remove the radiator. For additional information, refer to «Removal and Installation»(ref-355972-S36931535012010051800000) (2.5L, 3.0L) or «Removal and Installation»(ref-355972-S28880195882010051800000) (3.5L).
3. Backflush the radiator with the radiator in an upside-down position with a high-pressure hose in the lower hose location and backflush. NOTE: Radiator internal pressure must not exceed 138 kPa (20 psi). Damage to the radiator can result.
4. Remove the thermostat. For additional information, refer to «Removal and Installation»(ref-355972-S34230457192010013000000) (2.5L), «Removal and Installation»(ref-355972-S32752198242010013000000) (3.0L) or «Removal and Installation»(ref-355972-S01532809422010013000000) (3.5L). NOTE: On 2.5L engines, the thermostat and housing are serviced as an assembly.
5. Backflush the engine. Position the high-pressure water hose into the engine through the engine return and backflush the engine.

Scheme 27

ITEM DESCRIPTION TABLE

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ITEM DESCRIPTION TABLE

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ITEM DESCRIPTION TABLE

MATERIAL SPECIFICATIONS TABLE

Scheme 30

ITEM DESCRIPTION TABLE

MATERIAL SPECIFICATIONS TABLE

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ITEM DESCRIPTION TABLE

MATERIAL SPECIFICATIONS TABLE

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ITEM DESCRIPTION TABLE

MATERIAL SPECIFICATIONS TABLE

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ITEM DESCRIPTION TABLE

MATERIAL SPECIFICATIONS TABLE

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ITEM DESCRIPTION TABLE

MATERIAL SPECIFICATIONS TABLE

Radiator (View 1 Of 2)

ITEM DESCRIPTION TABLE

Scheme 35

ITEM DESCRIPTION TABLE

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1. Drain the cooling system. For additional information, refer to «Draining»(ref-355972-S18230589312010013000000) .
2. Remove the cooling fan motor and shroud. For additional information, refer to «Removal and Installation»(ref-355972-S18345981022010013000000) .
3. Detach the power steering hose retainer from the radiator.
4. Detach the coolant hose retainer from the radiator.
5. Disconnect the radiator-to-degas bottle hose from the radiator.
6. Disconnect the 2 transmission cooling tubes from the radiator. To install, tighten to 30 Nm (22 lb-ft).
7. Disconnect the lower radiator hose from the radiator.
8. Remove the 2 bolts from the upper radiator support brackets and position the radiator towards the engine and remove the 2 upper radiator support brackets from the radiator. To install, tighten to 10 Nm (89 lb-in).
9. Remove the A/C condensor-to-radiator pin-type retainer.
10. Squeeze the tabs and separate the A/C condenser from the radiator. Remove the radiator.
11. To install, reverse the removal procedure.
12. Fill and bleed the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(ref-355972-S37681702192010013000000) .

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ITEM DESCRIPTION TABLE

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ITEM DESCRIPTION TABLE