Nissan Frontier D40. Manual - part 189

RADIATOR

CO-17

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4.

Remove reservoir tank hose.

5.

Removal (upper and lower) radiator hoses.

CAUTION:

Be careful not to allow engine coolant to contact drive belts.

6.

Disconnect A/T fluid cooler hoses. (A/T models)
• Install blind plug to avoid leakage of A/T fluid.

7.

Remove lower shroud.

8.

Remove upper shroud.

9.

Remove front grille. Refer to 

EXT-18, "Removal and Installation"

.

10. Remove the upper radiator mounting bracket bolts.

11. Remove the two A/C condenser bolts. (if equipped)

12. Remove radiator as follows:

CAUTION:

Do not damage or scratch A/C condenser and radiator core when removing.

a.

With lifting and pulling radiator in a rear direction, disassemble
mounting rubber (lower) from radiator core support center.

CAUTION:

Because A/C condenser is attached to the front-lower por-
tion of radiator, moving it in the rear direction should be at a
minimum.

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PBIC1936E

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RADIATOR

b.

Lift A/C condenser up and remove radiator after disengaging the
fitting at front-bottom surface.

CAUTION:

Lifting A/C condenser should be minimum to prevent a load
to A/C piping.

c.

After removing radiator, put A/C condenser on radiator core sup-
port center to prevent a load to A/C piping, and temporarily
secure it with rope or by similar means.

INSTALLATION

Installation is in the reverse order of removal.

INSPECTION AFTER INSTALLATION

• Check for leaks of engine coolant. Refer to 

CO-11, "System Inspection"

.

• Start and warm up engine. Visually check there are no leaks of engine coolant and A/T fluid.

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.

6.

Check for leaks.

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COOLING FAN

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COOLING FAN

Exploded View

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Removal and Installation (Crankshaft driven type)

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REMOVAL

1.

Remove the engine front under cover. Refer to 

EXT-13, "Removal and Installation"

.

2.

Partially drain engine coolant. Refer to 

CO-12, "Changing Engine Coolant"

.

3.

Remove air duct and resonator assembly and air duct mounting brackets. Refer to 

EM-25, "Exploded

View"

.

4.

Remove upper radiator hose.

5.

Disconnect reservoir tank hose from upper shroud and radiator.

6.

Remove the upper and lower shrouds. Refer to 

CO-16, "Exploded View"

.

7.

Remove drive belt. Refer to 

EM-14, "Removal and Installation"

.

8.

Remove cooling fan.

9.

Remove fan coupling, if necessary.

10. Remove water pump pulley, if necessary.

INSPECTION AFTER REMOVAL

Fan Coupling

• Inspect fan coupling for oil leakage and bimetal conditions. 
• If there are any unusual concerns, replace the fan coupling.

Cooling Fan

• Inspect cooling fan for crack or unusual bend.
• If there are any unusual concerns, replace the cooling fan.

INSTALLATION

Installation is in the reverse order of removal.
• Install cooling fan with its front mark “F” facing front of engine. 

INSPECTION AFTER INSTALLATION

• Check for leaks of the engine coolant. Refer to 

CO-11, "System Inspection"

.

• Start and warm up the engine. Visually make sure that there are no leaks of the engine coolant.

1.

Cooling fan

2.

Fan coupling

3.

Water pump pulley

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WATER PUMP

WATER PUMP

Exploded View

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Removal and Installation

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REMOVAL

1.

Remove engine front under cover. Refer to 

EXT-13, "Removal and Installation"

.

2.

Drain engine coolant from radiator. Refer to 

CO-12, "Changing Engine Coolant"

.

CAUTION:

• Perform this step when the engine is cold. 
• Do not spill engine coolant on drive belt.

3.

Remove cooling fan and water pump pulley. Refer to 

CO-19, "Removal and Installation (Crankshaft driven

type)"

.

4.

Remove water pump with power tool.

CAUTION:

• Handle water pump vane so that it does not contact any other parts.
• Water pump cannot be disassembled and should be replaced as a unit.
NOTE:
• Engine coolant will leak from cylinder block, so have a receptacle ready below.

INSPECTION AFTER REMOVAL

1.

Gasket

2.

Water outlet

3.

Water pump pulley

4.

Water pump

5.

Thermostat

6.

O-ring

7.

Water inlet

8.

Water pump and thermostat housing 9.

Heater pipe

10. Water hose

11.

Water hose

12. Heater outlet

13. Engine coolant temperature sensor

14. Water control valve

A.

To heater

B.

To electric throttle control actuator

C.

To oil cooler

Front

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