Infiniti QX56 (JA60). Manual - part 193

ENGINE COOLANT

CO-13

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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.

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 bring 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 before installing the vented reservoir cap.

FLUSHING COOLING SYSTEM

1. Drain the water from the engine cooling system. Refer to 

CO-11, "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 

CO-11, "Changing Engine Coolant"

.

7. Repeat steps 2 through 6 until clear water begins to drain from the radiator.

Altitude above sea level

Vacuum gauge reading

0 - 100 m (328 ft)

: 28 inches of vacuum

300 m (984 ft)

: 27 inches of vacuum

500 m (1,641 ft)

: 26 inches of vacuum

1,000 m (3,281 ft)

: 24 - 25 inches of vacuum

LLIA0057E

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RADIATOR

RADIATOR

Checking Radiator

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Check radiator for mud or clogging. If necessary, clean radiator as follows.

CAUTION:

• Be careful not to bend or damage the radiator fins.

• When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radia-

tor shroud and horns. Then tape the harness and electrical connectors to prevent water from enter-

ing.

1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surfaces.
3. Stop washing when dirt and debris no longer flow out from the radiator.
4. Blow air into the back side of radiator core vertically downward.

• Use compressed air lower than 490 kPa (5 kg/cm

2

, 71 psi) and keep distance more than 30 cm (11.8 in). 

5.  Blow air again into all the radiator core surfaces until no water sprays out.

RADIATOR

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< ON-VEHICLE REPAIR >

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ON-VEHICLE REPAIR

RADIATOR

Exploded View

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Removal and Installation

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WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could occur from high-pressure

engine coolant escaping from the radiator.    

REMOVAL

CAUTION:

Perform when the engine is cold.
1. Drain engine coolant from the radiator. Refer to 

CO-11, "Changing Engine Coolant"

.

2. Remove engine room cover. Refer to 

EM-24, "Removal and Installation"

.

3. Remove air cleaner and air duct assembly. Refer to 

EM-25, "Removal and Installation"

.

4. Disconnect A/T fluid cooler hoses. 

• Install blind plug to avoid leakage of A/T fluid.

1.

Radiator

2.

Bolt

3.

Mounting rubber

4.

A/T fluid cooler hose

5.

Radiator hose (lower)

6.

Flaps

7.

Radiator shroud (upper)

8.

Radiator shroud (lower)

9.

Drain plug

10. Radiator hose (upper)

11. Reservoir tank hose

12. By-pass hose

13. Reservoir tank

14. Reservoir tank cap

A.

To radiator fill neck

B.

To A/T cooler tube

C.

To water suction pipe

D.

To thermostat housing

WBIA0694E

CO-16

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RADIATOR

5. Disconnect the radiator lower hose from the radiator.

CAUTION:

Do not allow coolant to contact drive belts.

6. Remove the lower radiator shroud.

• Release the tabs, pull lower radiator shroud rearwards and

down to remove.

7. Disconnect the radiator upper hose and the coolant reservoir hose from the radiator.

CAUTION:

Do not allow coolant to contact drive belt.

8. Remove the radiator shroud upper bolts and remove the radiator

shroud upper (A).

9. Remove the upper radiator mounting bolts and rubbers.
10. Remove the A/C condenser bolts and brackets.

NOTE:

Lift A/C condenser up and forward to remove from radiator.

11. Remove A/T oil cooler bolts and oil cooler from radiator and

position aside.

WBIA0407E

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