2011 INFINITI QX56 radiator cap

CO-14
< REMOVAL AND INSTALLATION >
RADIATOR
to release built-up pressure. Carefully remove radiator cap by turning it all the way. Note that the reser-
voir tank cap side is also under pressure.
1. Remove front under cover with power tool. Refer to EXT-25, "
Exploded View".
2. Remove engine cover. Refer to EM-25, "
Exploded View".
3. Drain engine coolant from radiator. Refer to CO-8, "
Draining".
CAUTION:
 Perform this step when the engine is cold.
 Never spill engine coolant on drive belts.
4. Remove radiator hose (lower).
5. Remove fan shroud (lower). Refer to CO-13, "
Exploded View".
6. Move reservoir tank to the position without the hindrance for work.
7. Remove radiator core support cover. Refer to DLK-220, "
Exploded View".
8. Remove fan shroud (upper), refer to following.
a. Remove EVAP hose mounting bolts and move harness to aside.
b. Move air cleaner case to the position without the hindrance for work. Refer to EM-27, "
Exploded View".
NOTE:
The air cleaner case connector is not required to be disconnected.
9. Remove radiator grille. Refer to EXT-19, "
Exploded View".
10. Move condenser to the position without the hindranc e for work with the following procedures. Refer to HA-
38, "Exploded View".
 Remove mounting bolts and disconnect A/C piping from radiator.
 Remove air guide from radiator. Refer to EXT-12, "
Exploded View".
 Remove radiator mounting bolts.
11. Remove radiator hose (upper).
12. Remove radiator as per the following: CAUTION:
Be careful not to damage radiator core.
 Lift up and pull the radiator (1) forward, and then remove themounting rubber (lower) (3) from the radiator core support (2).
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
 Use genuine mounting bolts for th e cooling fan assembly and strictly observe the tightening torque.
(Breakage prevention for radiator)
NOTE:
 Insert the radiator hose (1) all the way to the st opper (2) or by 33 mm (1.30 in) (hose without a stopper).
: Vehicle front
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JPBIA4294GB
Revision: 2010 May2011 QX56

RADIATORCO-15
< REMOVAL AND INSTALLATION >
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 For the orientation of the hose clamp pawl, refer to the figure.
*Refer to the illustrations for the specific position each hose clamp tab.
 The angle (b) created by the hose clamp pawl and the specified
line (A) must be within ±15 ° as shown in the figure.
 To install hose clamps (1), check that the dimension (A) from the end of the paint mark (2) on the radiator hose to the hose clamp is
within the reference value.
InspectionINFOID:0000000006289665
INSPECTION AFTER INSTALLATION
 Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the
radiator cap tester (commercial service tool). Refer to CO-8, "
Inspection".
 Start and warm up the engine. Visually check that there is no leakage of engine coolant.
Unit mm (in)
A. Radiator side B. Engine side
Radiator hose Hose end Paint mark Position of hose clamp*
Radiator hose (upper) Radiator side Upper A
Engine side Upper B
Radiator hose (lower) Radiator side Lower C
Engine side Left side D
E. View E f. 45 °
: Vehicle upper : Vehicle front
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Dimension “A” ( −1) – (+1) mm
JSBIA0241ZZ
Revision: 2010 May2011 QX56

CO-18
< REMOVAL AND INSTALLATION >
WATER PUMP
WATER PUMP
Exploded ViewINFOID:0000000006289669
Removal and InstallationINFOID:0000000006289670
CAUTION:
 When removing water pump assembly, be careful not to get engine coolant on drive belts.
 Water pump cannot be disassembled and should be replaced as a unit.
 After installing water pump, co nnect hose and clamp securely, then check for leakage using the radi-
ator cap tester (commercial service tool) and the radiator cap tester adapter (commercial service
tool).
REMOVAL
1. Drain engine coolant from drain plugs on radiator and cylinder block. Refer to CO-8, "Draining" and EM-
103, "Setting".
CAUTION:
 Perform this step when engine is cold.
 Never spill engine coolant on drive belt.
2. Remove front under cover with power tool. Refer to EXT-25, "
Exploded View".
3. Remove fan shroud (lower). Refer to CO-13, "
Exploded View".
4. Move reservoir tank to the position with out the hindrance for work. Refer to CO-13, "
Exploded View".
5. Remove radiator core support cover. Refer to DLK-220, "
Exploded View".
6. Remove fan shroud (upper). Refer to CO-13, "
Exploded View".
7. Remove drive belt. Refer to EM-20, "
Exploded View".
8. Remove cooling fan, fan coupling, cooling fan pulley and bracket. Refer to CO-16, "
Exploded View"
9. Remove radiator hose (upper). Refer to CO-13, "Exploded View".
10. Remove water pump pulley.
1. Water pump pulley 2. Water pump 3. Gasket
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA2316GB
Revision: 2010 May2011 QX56

WATER PUMPCO-19
< REMOVAL AND INSTALLATION >
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11. Remove water pump. Refer to
CO-18, "Exploded View".
 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.
 Never disassemble water pump.
INSTALLATION
Install in the reverse order of removal.
InspectionINFOID:0000000006289671
INSPECTION AFTER REMOVAL
 Visually check that there is no significant dirt or rusting on water pump body and vane (A).
 Check there is no slack in vane shaft, and that it turns smoothly when rotated by hand.
 If anything is found, replace water pump.
INSPECTION AFTER INSTALLATION
 Check that the reservoir tank cap is tightened.
 Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the
radiator cap tester (commercial service tool). Refer to CO-8, "
Inspection".
 Start and warm up the engine. Visually check that there is no leakage of engine coolant.
JPBIA2315ZZ
Revision: 2010 May2011 QX56

CO-22
< REMOVAL AND INSTALLATION >
WATER INLET AND THERMOSTAT ASSEMBLY
 Place a thread (A) so that it is caught in the valve of the thermostat.Immerse fully in a container filled with water. Heat while stirring.
 The valve opening temperature is the temperature at which the
valve opens and falls from the thread.
 After checking the maximum valve lift, lower the water temperature and check the valve closing temperature.
 If the malfunctioning condition, when valve seating at ordinary room temperature, or measured values are out of the standard,
replace thermostat.
INSPECTION AFTER INSTALLATION
 Check that the reservoir tank cap is tightened.
 Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the
radiator cap tester (commercial service tool). Refer to CO-8, "
Inspection".
 Start and warm up the engine. Visually chec k that there is no leakage of engine coolant.
Thermostat (Standard) : Refer to
CO-23, "
Thermostat".
JPBIA2313ZZ
Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
CO-23
< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Periodical Maintenance SpecificationINFOID:0000000006289675
ENGINE COOLANT CAPACITY (APPROXIMATELY)
Unit: (US qt, Imp qt)
RadiatorINFOID:0000000006289676
Unit: kPa (kg/cm2, psi)
ThermostatINFOID:0000000006289677
Engine coolant capacity [With reservoir tank (“MAX” level)] 14.9 (15-6/8, 13-1/8)
Reservoir tank engine coolant capacity (At “MAX” level) 1.0 (1, 7/8)
Reservoir tank cap relief pressure
Standard 108.2 - 127.8 ( 1.1 - 1.3, 15.7 - 18.5)
Limit 98 (1.0, 14)
Leakage testing pressure 186 (1.9, 27)
ThermostatStandard
Valve opening temperature 82 °C (180 °F)
Maximum valve lift 10.0 mm/95 °C (0.394 in/203 °F)
Valve closing temperature 77 °C (171 °F)
Revision: 2010 May2011 QX56

EC-400
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P1217 ENGINE OVER TEMPERATURE
P1217 ENGINE OVER TEMPERATURE
DTC LogicINFOID:0000000006217909
DTC DETECTION LOGIC
NOTE:

If DTC P1217 is displayed with DTC UXXXX, perform the trouble diagnosis for DTC UXXXX.
 If DTC P1217 is displayed with DTC P0607, perfo rm the trouble diagnosis for DTC P0607. Refer to
EC-378, "
DTC Logic".
 If DTC P1217 is displayed with DTC P0527, perfo rm the trouble diagnosis for DTC P0527. Refer to
EC-367, "
DTC Logic".
If the cooling fan or any of other components in the cooling system has a malfunction, engine coolant temper-
ature increases.
When the engine coolant temperature reaches an abnorma lly high temperature condition, a malfunction is
indicated.
CAUTION:
When a malfunction is indicated, al ways replace the coolant. Refer to CO-8, "
Draining" and CO-9,
"Refilling". Also, replace the engine oil. Refer to LU-8, "Draining" and LU-8, "Refilling".
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Always use
coolant with the proper mixture ratio. Refer to MA-11, "
Anti-Freeze Coolant Mixture Ratio".
2. After refilling coolant, run engine to en sure that no water-flow noise is emitted.
DTC CONFIRMATION PROCEDURE
1.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to EC-400, "
Component Function Check".
NOTE:
Use component function check to check the overall functi on of the cooling fan. During this check, a DTC might
not be confirmed.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to EC-401, "
Diagnosis Procedure".
Component Function CheckINFOID:0000000006217910
1.PERFORM COMPONENT FUNCTION CHECK-I
WARNING:
Never remove the reservoir tank cap when the engi ne is hot. Serious burns could be caused by high
pressure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217 Engine over temperature
(Overheat)  Cooling fan does not operate properly
(Overheat).
 Cooling fan system does not operate properly (Overheat).
 Engine coolant is not within the specified quantity.  Harness or connectors
(The cooling fan circuit is open or shorted.)
 IPDM E/R
 Electrically-controlled cooling fan coupling
 Cooling fan speed sensor
 Radiator hose
Radiator
 Reservoir tank cap
 Water pump
Thermostat
Revision: 2010 May2011 QX56

EC-402
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P1217 ENGINE OVER TEMPERATURE
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK ENGINE COOLANT LEAKAGE-II
Check the following for leakage.
Hose
 Radiator
 Water pump
>> Repair or replace malfunctioning part.
4.CHECK RESERVOIR TANK CAP
Check reservoir tank cap. Refer to CO-11, "
RESERVOIR TANK CAP : Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace reservoir tank cap.
5.CHECK THERMOSTAT
Check thermostat. Refer to CO-21, "
Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace thermostat. Refer to CO-20, "
Removal and Installation".
6.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-216, "
Component Inspection (Engine Coolant Temperature Sensor)".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace engine coolant temperature sensor. Refer to EM-86, "
Exploded View".
7.CHECK MAIN 12 CAUSES
If the cause cannot be isolated, check the CO-6, "
TroubleshootingChart".
>> INSPECTION END
Revision: 2010 May2011 QX56