2010 INFINITI QX56 radiator cap

MA-16
< ON-VEHICLE MAINTENANCE >
ENGINE MAINTENANCE
• Check if the engine coolant reservoir tank level is within MIN toMAX level when engine is cool.
• Adjust engine coolant level as necessary.
CHECKING COOLING SYSTEM FOR LEAKS
WARNING:
Never remove the radiator or reservoir cap when th e engine is hot. Serious burns could occur from
high-pressure engine coolant escaping from the radiator or reservoir.
• To check for leakage, apply pressure to the cooling system at the
reservoir filler neck using suitable tool and Tool.
CAUTION:
Higher pressure than specified may cause radiator damage.
NOTE:
In case that engine coolant decreases, replenish cooling system
with engine coolant.
• If any concerns are found, repair or replace damaged parts.
CHECKING RESERVOIR CAP
• Check reservoir cap relief pressure using suitable tool and Tool.
NOTE:
Apply engine coolant to the cap seal.
• Replace the reservoir cap if there is any damage in the negative- pressure valve, or if the open-valve pressure is outside of the limit.
CHECKING RADIATOR CAP
Inspect the radiator cap.
NOTE:
Thoroughly wipe out the radiator filler neck to remove any waxy resi-
due or foreign material.
• Replace the cap if the metal plunger cannot be seen around theedge of the black rubber gasket.
• Replace the cap if deposits of waxy residue or other foreign mate- rial are on the black rubber gasket or the metal retainer.
SMA412B
Tool number : EG17650301 (J-33984-A)
Leakage test pressure : 137 kPa (1.4 kg/cm, 20 psi)
WBIA0612E
Tool number : EG17650301 (J-33984-A)
Standard : 95 - 125 kPa (0.97 - 1.28 kg/cm
2, 14 - 18 psi)
WBIA0611E
PBIC2816E
Revision: April 20092010 QX56

ENGINE MAINTENANCEMA-17
< ON-VEHICLE MAINTENANCE >
C
DE
F
G H
I
J
K L
M B
MA
N
O A
• Pull negative-pressure valve to open it and make sure that it closes
completely when released.
• Make sure that there is no dirt or damage on the valve seat of radi-
ator cap negative-pressure valve.
• Make sure that there are no unusualness in the opening and clos- ing conditions of negative-pressure valve.
ENGINE COOLANT : Chang ing Engine CoolantINFOID:0000000005403134
WARNING:
• To avoid being scalded, never change the coolant when the engine is hot.
• Wrap a thick cloth around the cap to carefully remo ve the cap. First, turn the cap a quarter of a turn
to release any built-up pressure, then push down and turn the cap all the way to remove it.
DRAINING ENGINE COOLANT
1. Turn ignition switch ON and set temperature control lever all the way to HOT position or the highest tem-
perature position. Wait 10 seconds and turn ignition switch OFF.
2. Remove the engine front undercover using power tool.
3. Open the radiator drain plug at the bottom of the radiator, and remove the radiator filler cap. This is the only step required
when partially draining the cooling system (radiator only).
CAUTION:
Do not to allow the coolant to contact the drive belts.
4. When draining all of the coolant in the system for engine removal or repair, it is necessary to drain the cylinder block.
Remove the RH cylinder block drain plug to drain the right bank
and the oil cooler hose to drain the left bank as shown.
SMA967B
WBIA0391E
PBIC0146E
WBIA0392E
Revision: April 20092010 QX56

MA-18
< ON-VEHICLE MAINTENANCE >
ENGINE MAINTENANCE
5. Remove the reservoir tank to drain the engine coolant, then clean the reservoir tank before installing it.
6. Check the drained coolant for contaminants such as rust, corrosion or discoloration.
If the coolant is contaminated, flush the engine cooling system. Refer to MA-17, "
ENGINE COOLANT :
Changing Engine Coolant".
REFILLING ENGINE COOLANT
1. Close the radiator drain plug. Install the reservoir tank, cylinder block drain plug, and the oil cooler hose, if
removed for a total system drain or for engine removal or repair.
• The radiator must be completely empty of coolant and water.
• Apply sealant to the threads of the cylinder bl ock drain plug. Use Genuine High Performance Thread
Sealant or equivalent. Refer to GI-15, "
Recommended Chemical Products and Sealants".
2. Set the vehicle heater controls to the full HOT and heat er ON position. Turn the vehicle ignition ON with
the engine OFF as necessary to activate the heater mode.
3. Remove the vented reservoir cap and replace it with a non-vented reservoir cap before filling the cooling
system.
4. Install the Tool by installing the radiator cap adapter onto the radiator neck opening. Then attach the gauge body assembly
with the refill tube and the venturi assembly to the radiator cap
adapter.
5. Insert the refill hose into the coolant mixture container that is placed at floor level. Make sure the ball valve is in the closed
position.
• Use Genuine NISSAN Long Life Anti-freeze coolant or equiva-lent, mixed 50/50 with distilled water or demineralized water.
Refer to MA-13, "
Fluids and Lubricants".
6. Install an air hose to the venturi assembly, the air pressure must be within specification.
CAUTION:
The compressed air supply must be equipped with an air
dryer.
7. The vacuum gauge will begin to rise and there will be an audible hissing noise. During this process open the ball valve on the refill hose slightly. Coolant will be vi sible rising in the refill hose. Once the refill hose is
full of coolant, close the ball valve. This will purge any air trapped in the refill hose.
8. Continue to draw the vacuum until the gauge reaches 28 inches of vacuum. The gauge may not reach 28 inches in high altitude
locations, use the vacuum specifications based on the altitude
above sea level.Radiator drain plug
: Refer to MA-17
.
RH cylinder block drain plug : Refer to EM-83
.
Tool number : KV991J0070 (J-45695)
Cooling system capacity
(with reservoir) : Refer to
MA-13, "
Fluids
and Lubricants".
Compressed air
supply pressure : 5.7 - 8.5 kPa (5.6 - 8.4 kg/cm
2, 80
- 120 psi)
LLIA0058E
Altitude above sea level Vacuum gauge reading
0 - 100 m (328 ft) : 28 inches of vacuum
300 m (984 ft) : 27 inches of vacuum
LLIA0057E
Revision: April 20092010 QX56

ENGINE MAINTENANCEMA-19
< ON-VEHICLE MAINTENANCE >
C
DE
F
G H
I
J
K L
M B
MA
N
O A
9. When the vacuum gauge has reached the specified
amount, disconnect the air hose and wait 20 seconds
to see if the system loses any vacuum. If the vacuum level drops, perform any necessary repairs to the
system and repeat steps 6 - 8 to br ing the vacuum to the specified amount. Recheck for any leaks.
10. Place the coolant container (with the refill hose inserted) at the same level as the top of the radiator. Then
open the ball valve on the refill hose so the coolant will be drawn up to fill the cooling system. The cooling
system is full when the vacuum gauge reads zero.
CAUTION:
Do not allow the coolant container to get too low when filling, to avoid air from being drawn into
the cooling system.
11. Remove the Tool from the radiator neck opening and install the radiator cap.
12. Remove the non-vented reservoir cap.
13. Fill the cooling system reservoir tank to the specified level. Run the engine to warm up the cooling system and top up the system as necessary befor e installing the vented reservoir cap.
FLUSHING COOLING SYSTEM
1. Drain the water from the engine cooling system. Refer to MA-17, "ENGINE COOLANT : Changing Engine
Coolant".
2. Fill the radiator and the reservoir tank (to the “MAX” line), with water. Reinstall the radiator cap and leave
the vented reservoir cap off.
3. Run the engine until it reaches normal operating temperature.
4. Press the engine accelerator two or three times under no-load.
5. Stop the engine and wait until it cools down.
6. Drain the water from the engine cooling system. Refer to MA-17, "
ENGINE COOLANT : Changing Engine
Coolant".
7. Repeat steps 2 through 6 until clear water begins to drain from the radiator.
FUEL LINES
FUEL LINES : Checking Fuel LineINFOID:0000000005403135
Inspect fuel lines, fuel filler cap and fuel tank for improper attach-
ment, leaks, cracks, damage, loos e connections, chafing or deterio-
ration.
If necessary, repair or replace damaged parts.
FUEL FILTER
FUEL FILTER : Changing Fuel FilterINFOID:0000000005259654
The fuel filter is part of the fuel level sensor unit, fuel filter and fuel pump assembly and cannot be replaced
separately. Refer to FL-7, "
Removal and Installation".
WARNING:
Before replacing the fuel filter, release the fuel pressure from the fuel system. Refer to EC-489, "
Fuel
Pressure Check".
AIR CLEANER FILTER
500 m (1,641 ft): 26 inches of vacuum
1,000 m (3,281 ft) : 24 - 25 inches of vacuum
SMA803A
Revision: April 20092010 QX56

MA-28
< ON-VEHICLE MAINTENANCE >
CHASSIS AND BODY MAINTENANCE
5. Allow the A/T fluid temperature to fall to approximately 65°C (149°F). Use the CONSULT-III to monitor the
A/T fluid temperature as follows:
NOTE:
The A/T fluid level will be significantly affected by t he A/T fluid temperature as shown. Therefore monitor
the A/T fluid temperature data using the CONSULT-III.
a. Connect CONSULT-III to data link connector.
b. Select “MAIN SIGNALS” in “DATA MONI TOR” mode for “A/T” with CONSULT-III.
c. Read out the value of “ATF TEMP 1”.
6. Re-check the A/T fluid level at A/T fluid temperatures of approxi- mately 65 °C (149° F) using the “HOT” range on the A/T fluid
level gauge as shown. The HOT range is between 50 ° - 80 ° C
(122° - 176 ° F).
CAUTION:
• When wiping the A/T fluid from the A/T fluid level gauge,
always use lint-free paper, not a cloth.
• To check the A/T fluid level , insert the A/T fluid level
gauge until the cap contacts the top of the A/T fluid charg-
ing pipe, with the gauge reversed from the normal
inserted position as shown.
7. Check the A/T fluid condition. • If the A/T fluid is very dark or has some burned smell, there
may be an internal problem with the transmission. Refer to
TM-152, "
A/T Fluid Cooler Cleaning". Flush the transmission
cooling system after repairing the transmission.
• If the A/T fluid contains frictional material (clutches, bands, etc.), replace the radiator and flush the transmission cooler
lines using cleaning solvent and compressed air after repairing
the transmission.
8. Install the A/T fluid level gauge in the A/T fluid charging pipe.
9. Tighten the A/T fluid level gauge bolt to specification.
SLIA0016E
LLIA0071E
A/T fluid level
gauge bolt : Refer to
TM-186, "Removal and Installation (2WD)" or TM-188, "Removal
and Installation (4WD)"
SCIA2899E
Revision: April 20092010 QX56

A/T FLUIDTM-149
< ON-VEHICLE MAINTENANCE >
CEF
G H
I
J
K L
M A
B
TM
N
O P
5. Allow the A/T fluid temperature to fall to approximately 65 °C (149° F). Use the CONSULT-III to monitor the
A/T fluid temperature as follows:
NOTE:
The A/T fluid level will be significantly affected by the A/T fluid temperature as shown. Therefore monitor
the A/T fluid temperature data using the CONSULT-III.
a. Connect CONSULT-III to data link connector.
b. Select “MAIN SIGNALS” in “DATA MO NITOR” mode for “A/T” with CONSULT-III.
c. Read out the value of “ATF TEMP 1”.
6. Re-check the A/T fluid level at A/T fluid temperatures of approxi-
mately 65° C (149°F) using the “HOT” range on the A/T fluid
level gauge as shown. The HOT range is between 50 ° - 80° C
(122° - 176 ° F).
CAUTION:
• When wiping the A/T fluid from the A/T fluid level gauge, always use lint-free paper, not a cloth.
• To check the A/T fluid level, insert the A/T fluid level gauge until the cap contacts the top of the A/T fluid charg-
ing pipe, with the gauge reversed from the normal
inserted position as shown.
7. Check the A/T fluid condition. • If the A/T fluid is very dark or has some burned smell, there
may be an internal problem with the transmission. Refer to
TM-152, "
A/T Fluid Cooler Cleaning". Flush the transmission
cooling system after repairing the transmission.
• If the A/T fluid contains frictional material (clutches, bands, etc.), replace the radiator and flush the transmission cooler
lines using cleaning solvent and compressed air after repairing
the transmission.
8. Install the A/T fluid level gauge in the A/T fluid charging pipe.
9. Tighten the A/T fluid level gauge bolt to specification.
SLIA0016E
LLIA0071E
A/T fluid level
gauge bolt : Refer to
TM-186, "Removal and Installation (2WD)" or TM-188, "Removal
and Installation (4WD)"
SCIA2899E
Revision: April 20092010 QX56