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Engine Cooling System (VK45DE): Removal & Installation Infiniti FX45 I рестайлинг

Cooling System (Mechanical) 9 illustrations ~858 words

REMOVAL

WARNINGDo not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine coolant escaping from radiator. Wrap a thick cloth around radiator cap. Slowly turn it a quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.

Scheme 5

Scheme 5
Scheme 5

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7

Scheme 8

Scheme 8
Scheme 8
  1. Remove engine cover with power tool. Refer to " ENGINE ROOM COVER ".
  2. Remove engine front undercover with power tool.
  3. Drain engine coolant from radiator. Refer to " CHANGING ENGINE COOLANT ". CAUTION: Perform this step when engine is cold.
  4. Remove air duct (inlet), air cleaner case and mass air flow sensor assembly. Refer to " AIR CLEANER AND AIR DUCT ".
  5. Remove radiator hoses (upper and lower). CAUTION: Do not spill engine coolant on drive belts.
  6. Disconnect A/T fluid cooler hoses. Install blind plug to avoid leakage of A/T fluid.
  7. Remove radiator shroud (lower). While pressing left and right pawls in direction indicated by arrows, pull radiator shroud (lower) rearwards to remove. see scheme 10: Locating Pawl
  8. Lift up and remove radiator shroud. see scheme 11: Identifying Radiator Shroud
  9. Remove washer tank mounting bolts. see scheme 12: Locating Washer Tank Mounting Bolts
  10. Rotate two radiator upper mount brackets 90 degrees in the direction as shown in the figure, and remove them. (Scheme 5): Identifying Radiator Upper Mount Brackets
  11. Lift up and remove radiator.
CAUTIONDo not damage or scratch A/C condenser and radiator core when removing.

Applying Pressure To Cap With A Tester. Scheme 9

Fig. 14: Identifying Radiator
Scheme 14: Identifying Radiator

INSTALLATION

Install in the reverse order of removal.

  1. Remove air duct (inlet). Refer to " AIR CLEANER AND AIR DUCT ".
  2. Remove engine front undercover with power tool.
  3. Remove radiator shroud (lower). Refer to " RADIATOR ".
  4. Remove drive belts. Refer to " DRIVE BELTS ".
  5. Remove fan coupling and cooling fan assembly. CAUTION: Do not damage or scratch radiator core when removing.
  6. Remove cooling fan from fan coupling.

Note the following, install in the reverse order of removal.

  1. Install cooling fan with its front mark "F" facing front of vehicle. Refer to " REMOVAL AND INSTALLATION ".

Identifying Components (Motor Driven Type) With Torque Specification. Scheme 10

Scheme 10: Identifying Components (Motor Driven Type) With Torque Specification
Scheme 10: Identifying Components (Motor Driven Type) With Torque Specification
  1. Remove front grille. Refer to " FRONT GRILLE ".
  2. Disconnect harness connector from fan motor.
  3. Remove cooling fan assembly.
CAUTIONDo not damage or scratch A/C condenser when removed.

Install in the reverse order of removal.

  1. Cooling fan is controlled by ECM. For details. Refer to " DTC P1217 ENGINE OVER TEMPERATURE ".

Removal and Installation

CAUTIONWhen removing water pump, be careful not to get engine coolant on drive belts. Water pump can not be disassembled and should be replaced as a unit. After installing water pump, connect hose and clamp securely, then check for leaks using radiator cap tester (commercial service tool) and radiator cap tester adapter [SST: EG17650301 (J33984-A)].
  1. Drain engine coolant from drain plugs on radiator and both side of cylinder block. Refer to " CHANGING ENGINE COOLANT " and " DISASSEMBLY ". CAUTION: Perform this step when engine is cold. Do not spill engine coolant on drive belts.
  2. Remove following parts: Engine front undercover Air duct (inlet); Refer to " AIR CLEANER AND AIR DUCT ". Alternator, water pump and A/C compressor belt; Refer to " DRIVE BELTS ".
  3. Remove fan coupling with cooling fan, and then fan and water pump pulley.
  4. Remove water pump. Engine coolant will leak from cylinder block, so have a receptacle ready under vehicle. CAUTION: Handle the water pump vane so that it does not contact any other parts. Do not disassemble water pump.

Install in the reverse order of removal.

  1. Drain engine coolant from drain plugs on radiator and both side of cylinder block. Refer to " CHANGING ENGINE COOLANT " and " DISASSEMBLY ". CAUTION: Perform this step when engine is cold. Do not spill engine coolant on drive belts.
  2. Remove engine cover with power tool. Refer to " ENGINE ROOM COVER ".
  3. Remove air duct (inlet). Refer to " AIR CLEANER AND AIR DUCT ".
  4. Disconnect water suction hose from water inlet.
  5. Remove water inlet and thermostat. CAUTION: Do not disassemble thermostat.
  6. Remove intake manifolds (upper and lower). Refer to " INTAKE MANIFOLD ".
  7. Disconnect radiator hose (upper) and water hoses from thermostat housing.
  8. Disconnect heater hoses from water outlet and heater pipe.
  9. Remove thermostat housing, water outlet pipe, water connector, water control valve, water outlet and heater pipe.
CAUTIONDo not disassemble water control valve.

Scheme 11

Scheme 11: INSPECTION AFTER REMOVAL
Scheme 11: INSPECTION AFTER REMOVAL
  1. Make sure that valves both in thermostat and water control valve are completely closing at normal temperature.
  2. Place a thread so that it is caught in the valves of the thermostat and water control valve. Immerse fully in a container filled with water. Heat while stirring. (The example in the figure shows thermostat.)
  3. The valve opening temperature is the temperature at which the valve opens and falls from the thread.
  4. Continue heating. Check the maximum valve lift. NOTE: The maximum valve lift standard temperature for water control valve is the reference value. see scheme 38: Checking Thermostat Valve
  5. After checking the maximum valve lift, lower the water temperature and check the valve closing temperature. Standard values
ThermostatWater control valve
Valve opening temperature80 - 84°C (176 - 183°F)93.5 - 96.5°C (200 - 206°F)
Maximum valve liftMore than 10 mm/95°C (0.39 in/203°F)More than 8 mm/108°C (0.315 in/226°F)
Valve closing temperature77°C (171°F)90°C (194°F)

VALVE TEMPERATURE DESCRIPTION

  1. If the malfunctioning condition, when closing valve at normal temperature, or measured values are out of the standard, replace thermostat and/or water control valve.

Note the following, and install in the reverse order of removal.

CAUTIONBe careful not to spill engine coolant over engine room. Use rag to absorb engine coolant.

Scheme 12

Scheme 12: Thermostat and Water Control Valve
Scheme 12: Thermostat and Water Control Valve
  1. Install thermostat and water control valve with the whole circumference of each flange part fit securely inside rubber ring. (The example in the figure shows thermostat.) see scheme 39: Identifying Thermostat Flange
  2. Install thermostat with jiggle valve facing upwards. (The position deviation may be within the range of ±10 degrees)
  3. Install water control valve with the up-mark facing up and the frame center part facing upwards. (The position deviation may be within the range of ±10 degrees)

Identifying Position Of Thermostat And Water Control Valve. Scheme 13

Scheme 13: Identifying Position Of Thermostat And Water Control Valve
Scheme 13: Identifying Position Of Thermostat And Water Control Valve

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