Infiniti FX35, FX50 (S51). Manual — part 448

RADIATOR

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RADIATOR

RADIATOR CAP

RADIATOR CAP : Inspection

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• Check valve seat of radiator cap.
- Check if valve seat (A) is swollen to the extent that the edge of the

metal plunger (B) cannot be seen when watching it vertically from
the top.

- Check if valve seat has no soil and damage.

• Pull negative-pressure valve to open it, and check that it close

completely when released.

- Check that there is no dirt or damage on the valve seat of radiator

cap negative-pressure valve.

- Check that there are no unusualness in the opening and closing

conditions of negative-pressure valve.

• Check radiator cap relief pressure.
- When connecting radiator cap to the radiator cap tester (commer-

cial service tool) and the radiator cap tester adapter (commercial
service tool) (A), apply engine coolant to the cap seal surface.

• Replace radiator cap if there is an unusualness related to the above three.

CAUTION:

When installing radiator cap, thoroughly wipe out the water inlet filler neck to remove any waxy resi-
due or foreign material.

RADIATOR

RADIATOR : Inspection

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Check radiator for mud or clogging. If necessary, clean radiator as per the following:
• Be careful not to bend or damage radiator fins.
• When radiator is cleaned without removal, remove all surrounding parts such as radiator cooling fan assem-

bly and horns. Then tape harness and connectors to prevent water from entering.

1.

Apply water by hose to the back side of the radiator core vertically downward.

2.

Apply water again to all radiator core surfaces once per minute.

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SMA967B

Standard and limit

: Refer to

CO-49, "Radiator"

.

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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 (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

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REMOVAL AND INSTALLATION

RADIATOR

Exploded View

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Removal and Installation

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REMOVAL

1.

Upper mount bracket

2.

Mounting rubber (upper)

3.

Radiator

4.

Mounting rubber (lower)

5.

Clamp

6.

Radiator hose (lower)

7.

Radiator hose (upper)

8.

Drain plug

9.

O-ring

10. Water drain hose

11.

O-ring

12. Air relief plug

13. Clamp

14. A/T fluid cooler hose

15. A/T fluid cooler hose

16. Cooling fan assembly

17. Grommet

18. Reservoir tank

19. Reservoir tank hose

20. Reservoir tank hose

21. Clamp

22. Reservoir tank cap

A.

To water inlet (inlet side)

B.

To water suction pipe

C.

To water inlet (outlet side)

D.

To A/T fluid cooler pipe

Refer to

GI-4, "Components"

for symbols in the figure.

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RADIATOR

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
to release built-up pressure. Carefully remove radiator cap by turning it all the way.

1.

Remove the following parts:
• Engine under cover, using a power tool.
• Engine cover and engine room cover (RH and LH): Refer to

EM-174, "Exploded View"

.

• Air cleaner case: Refer to

EM-177, "Exploded View"

.

• Air duct (inlet): Refer to

EM-177, "Exploded View"

.

• Hood lock stay assembly and horn: Refer to

DLK-243, "Exploded View"

and

HRN-7, "Exploded View"

.

2.

Remove condenser. Refer to

HA-104, "Exploded View"

.

3.

Drain engine coolant from radiator. Refer to

CO-33, "Draining"

.

CAUTION:

• Perform this step when the engine is cold.
• Never spill engine coolant on drive belts.

4.

Disconnect A/T fluid cooler hoses from radiator.
• Install blind plug to avoid leakage of A/T fluid.

5.

Remove radiator hoses (upper and lower) and reservoir tank hose.

CAUTION:

• Be careful not to allow engine coolant to contact drive belts.
• Never loosen radiator water inlet pipe mounting screw

(A). If loosened, replace radiator (1).

6.

Rotate two radiator upper mount brackets 90 degrees in direc-
tion as shown in the figure, and remove them.

7.

Remove radiator as per the following:

CAUTION:

Be careful not to damage radiator core.

a.

Lift up and pull the radiator (1) forward, and then remove the
mounting rubber (lower) (3) from the radiator core support (2).

2

: Radiator water inlet pipe

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: Radiator upper mount bracket

A

: Turn 90

°

counterclockwise

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: Vehicle front

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