Engine Cooling: Other Ford Focus I рестайлинг

ANTIFREEZE REFERENCE

ANTIFREEZE REFERENCE

COOLING FAN OPERATING TEMPERATURES REFERENCE

COOLING FAN OPERATING TEMPERATURES REFERENCE

Engine Coolant

Engine coolant concentration should be checked through the neck of the expansion tank with a hydrometer. The acceptable range of specific gravity (sg) of correctly balanced fluids is between 11.10 and 11.20 lbs/gal, which represents an engine coolant concentration between 40 percent and 55 percent. If the concentration falls below 40 percent there is insufficient low temperature protection and the corrosion resistance will be inadequate. In such cases the concentration must be brought back to specification.

The engine coolant should not be mixed with other coolant types. For cooling system top off, only use coolant which meets specification. For additional information, refer to SPECIFICATIONS .

Changing Coolant

Note. Providing the coolant has not been contaminated with other fluids or foreign matter, the robust corrosion resistance properties of this coolant means that it can be reused after changing an aluminum cooling system component, although the concentration should always be checked and maintained within specification.

This engine coolant should be changed after a period of 10 years or 150,000 miles, whichever occurs sooner. Refill with engine coolant mixed to the correct proportions.

Fail Safe Cooling (Zetec-E Only)

The vehicle has a strategy built into the powertrain control module (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 which 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 two cylinders and restricting the RPM to below 3000 RPM. Simultaneously the malfunction indicator lamp (MIL) will be illuminated. 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 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.

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 malfunction indicator lamp can only be extinguished by using a diagnostic tool after the fault has been rectified and the DTC cleared.

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.

Run On Fan (ROF) System

The Run on fan system is designed to keep the engine cooling fans running to cool the underhood components after keying the engine off. The fans are kept running when heavy engine loads have occurred prior to keying the engine off.

The ROF system consists of an electronic ROF relay (high speed fan relay) and an air temperature switch. The ROF relay replaces the standard fan relay for high speed operation and has a built in electronic module to activate the fan output after the ignition has been switched off. The air temperature switch is located behind the engine beside the heated oxygen sensors (HO2S) connectors.

During engine running and with the ignition switched on, the fan is controlled completely by the PCM in the same way as a non-ROF fan system. Dependent on the underhood temperature, the fans will keep running when the ignition is switched off. They remain running when the temperature is 96°C (204 °F) +/- 4.5°C (40°F) or above at the air temperature switch, until either the temperature decreases below 86°C (187°F) or the maximum run on time of 3 minutes has elapsed.

Scheme 91

Filling And Bleeding With RADKITPLUS

1. Install the special tool.
2. Using the special tool, follow the RADKITPLUS manufacturer's instructions to fill and bleed the cooling system.

Material

MATERIAL SPECIFICATION

Scheme 92

Scheme 93

Scheme 94

1. Drain the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(ref-207748-S36034059462005120100000) .
2. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(ref-234418) .
3. Remove the accessory drive belt. For additional information, refer to «SPECIFICATIONS & DRIVE BELT ROUTING»(ref-165277) .
4. Remove the two power steering hose bracket retaining nuts and position the hose and brackets aside.
5. Remove the cooling fan motor and shroud. For additional information, refer to «COOLING FAN MOTOR AND SHROUD - 2.3L»(ref-207748-S28873316082005120100000) .
6. Remove the four A/C compressor bolts and position the compressor aside.
7. Remove the hoses to the thermostat housing. Release the spring-style clamps. Twist and remove the coolant hoses from the thermostat housing.
8. Remove the bolts, the thermostat housing and the thermostat as an assembly.
9. To install, reverse the removal procedure.
10. Fill and bleed the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(ref-207748-S36034059462005120100000) .

Scheme 95

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Scheme 98

1. Disconnect the battery ground cable.
2. Drain the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(ref-207748-S36034059462005120100000) .
3. Loosen the coolant pump pulley retaining bolts.
4. Remove the accessory drive belt. For additional information, refer to «SPECIFICATIONS & DRIVE BELT ROUTING»(ref-165277) .
5. Remove the coolant pump pulley.
6. Detach the coolant pump from the coolant pump housing.
7. Rotate the coolant pump 180 degrees within the coolant pump housing and remove it. Discard the sealing ring

MATERIAL SPECIFICATION

Scheme 99

Scheme 100

1. Drain the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(ref-207748-S36034059462005120100000) .
2. Remove the accessory drive belt. For additional information, refer to «SPECIFICATIONS & DRIVE BELT ROUTING»(ref-165277) .
3. Remove the coolant pump pulley bolts and the pulley.
4. Remove the coolant pump retaining bolts and the coolant pump.
5. To install, reverse the removal procedure.
6. Fill and bleed the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(ref-207748-S36034059462005120100000) .

Scheme 101

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Scheme 110

1. Drain the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(ref-207748-S36034059462005120100000) .
2. Detach the wiring harness retaining clip from the cooling fan shroud.
3. Raise and support the vehicle. For additional information, refer to «JACKING AND LIFTING»(ref-234418) .
4. Detach and support the air conditioning condenser.
5. Using the special tool, disconnect the radiator upper hose (cooling fan motor and shroud shown removed for clarity).
6. Using the special tool, disconnect the coolant hoses (cooling fan motor and shroud shown removed for clarity).
7. Detach the wiring harness retaining clips from the cooling fan shroud.
8. Detach the wiring harness retaining clip from the radiator support bracket.
9. Disconnect the horn(s) electrical connector.
10. Remove the radiator support bracket bolts.
11. Remove the radiator support bracket.
12. Remove the radiator and cooling fan motor and shroud.
13. Remove the cooling fan motor and shroud from the radiator. Release the retaining clips. Slide the cooling fan motor and shroud from the radiator.

MATERIAL SPECIFICATION

All Vehicles

Scheme 111

Scheme 112

1. Disconnect the battery ground cable.
2. Disconnect the cooling fan motor electrical connectors.
3. Remove the two pin-type retainers.
4. Raise and support the vehicle. For additional information, refer to «JACKING AND LIFTING»(ref-234418) .
5. Remove the cooling fan motor and shroud. Release the top clips of the radiator to allow the cooling fan motor and shroud to be raised. Remove the fan and shroud.

MATERIAL SPECIFICATION

Scheme 113

1. Drain the cooling system. For additional information, refer to «COOLING SYSTEM DRAINING, FILLING AND BLEEDING»(ref-207748-S36034059462005120100000) .
2. Raise and support the vehicle. For additional information, refer to «JACKING AND LIFTING»(ref-234418) .
3. Disconnect the block heater electrical connector.
4. Remove the block heater. Discard the block heater.