Infiniti QX56 (Z62). Manual - part 238

CO-12

< PERIODIC MAINTENANCE >

RADIATOR

3.

Stop washing if any stains no longer flow out from radiator.

4.

Blow air into the back side of radiator core vertically downward.
• Use compressed air lower than 490 kPa (4.9 bar, 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 once per minute until no water sprays out.

RADIATOR

CO-13

< REMOVAL AND INSTALLATION >

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REMOVAL AND INSTALLATION

RADIATOR

Exploded View

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Removal and Installation

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REMOVAL

WARNING:

Never remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine
coolant escaping from water inlet. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn

1.

Radiator cap

2.

Radiator

3.

Mounting rubber (upper)

4.

Mounting rubber (lower)

5.

Clamp

6.

Radiator hose (lower)

7.

O-ring

8.

Drain plug

9.

Fan shroud (lower)

10. Fan shroud (upper)

11.

Radiator hose (upper)

12. Mounting rubber (lower)

13. Reservoir tank hose

14. Reservoir tank 

15. Reservoir tank hose

16. Clamp

17. Reservoir tank cap

A.

To radiator

B.

To water outlet

C.

To water inlet

Refer to 

GI-4, "Components"

 for symbols in the figure.

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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 hindrance 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 the

mounting 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 the cooling fan assembly and strictly observe the tightening torque.

(Breakage prevention for radiator)

NOTE:
• Insert the radiator hose (1) all the way to the stopper (2) or by 33 mm (1.30 in) (hose without a stopper).

: Vehicle front

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RADIATOR

CO-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. 

Inspection

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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

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View E

f.

45

°

: Vehicle upper

: Vehicle front

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Dimension “A”

(

−

1) – (+1) mm

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