Nissan Pathfinder (2011 year). Manual — part 131

RADIATOR

CO-19

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CAUTION:

• Perform this step when engine is cold.

• Do not spill engine coolant on drive belts.

3. Remove engine room cover. Refer to

EM-25, "Removal and Installation"

.

4. Remove air duct and resonator assembly and air cleaner case (upper). Refer to

EM-26, "Removal and

Installation"

.

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

CAUTION:

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

7. Disconnect A/T fluid cooler hoses.
8. Remove radiator shroud (lower).
9. Remove radiator shroud (upper).
10. Remove engine cooling fan (Motor driven type). Refer to

CO-22, "Removal and Installation (Motor driven

type)"

.

11. Remove front grille. Refer to

EXT-20, "Removal and Installation"

.

12. Remove the upper mount bracket bolts.

13. Remove the two A/C condenser bolts.

14. Remove radiator as follows:

CAUTION:

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

a. Lift and pull radiator rearward to disengage rubber mounting

(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.

LBIA0419E

LBIA0421E

PBIC1936E

2011 Pathfinder

CO-20

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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 cen-

ter support and temporarily fasten it with rope or wire to prevent

overloading the A/C piping.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

Do not reuse O-rings.

INSPECTION AFTER INSTALLATION

• Check for engine coolant leaks. Refer to

CO-11, "System Inspection"

.

• Start and warm up engine. Visually check for coolant and A/T fluid leaks. Correct if necessary.

Checking Radiator

INFOID:0000000006247854

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. Spray water to the back side of the radiator core starting at the top and working down using a side to side

motion.

2. Stop washing when dirt and debris no longer flow out from the radiator.
3. Blow air into the back side of radiator core starting at the top and working down using a side to side motion

until no water sprays out.
• Use compressed air lower than 490 kPa (5 kg/cm

2

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

4. Check for leaks and repair if necessary.

PBIC1054E

2011 Pathfinder

ENGINE COOLING FAN

CO-21

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ENGINE COOLING FAN

Exploded View

INFOID:0000000006247855

Crankshaft Driven Type

Removal and Installation (Crankshaft driven type)

INFOID:0000000006247856

WARNING:

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

engine coolant escaping from the radiator. 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.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.

REMOVAL

1. Remove the engine cooling fan (Motor driven type). Refer to

CO-22, "Removal and Installation (Motor

driven type)"

.

2. Remove the drive belt. Refer to

EM-14, "Removal and Installation"

.

3. Remove the engine cooling fan.
4. Remove the fan coupling, if necessary.
5. Remove the cooling fan pulley, if necessary.
6. Remove the drive belt auto-tensioner, if necessary.
7. Remove the fan bracket, if necessary.

INSPECTION AFTER REMOVAL

Fan Coupling

• Inspect fan coupling for oil leakage and bimetal conditions.

• If there are any concerns, replace the fan coupling.

Fan Bracket

AWBIA0985ZZ

1.

Cooling fan

2.

Fan coupling

3.

Fan bracket

4.

Cooling fan pulley

5.

Stud

SLC072

2011 Pathfinder

CO-22

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ENGINE COOLING FAN

• Visually check that there is no significant looseness in the fan

bracket shaft, and that it turns smoothly by hand.

• If there are any concerns, replace the fan bracket assembly.

INSTALLATION

Installation is in the reverse order of removal.

• Install cooling fan with its front mark “F” facing front of engine. Refer to

CO-21, "Removal and Installation

(Crankshaft driven type)"

.

CAUTION:

Do not reuse O-rings.

INSPECTION AFTER INSTALLATION

• Check for leaks of the engine coolant. Refer to

CO-11, "System Inspection"

.

• Start and warm up the engine. Visually check for coolant leaks and repair if necessary.

Removal and Installation (Motor driven type)

INFOID:0000000006247857

REMOVAL

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.
1. Remove the engine under cover. Refer to

EXT-15, "Removal and Installation"

.

2. Partially drain engine coolant from radiator. Refer to

CO-13, "Changing Engine Coolant"

.

CAUTION:

• Perform this step when engine is cold.

• Do not spill engine coolant on drive belts.

3. Release the lower radiator shroud (2) from the upper radiator

shroud (1) and position aside.

• Release the tabs, pull lower radiator shroud (2) rearward and

down.

4. Remove engine room cover. Refer to

EM-25, "Removal and Installation"

.

5. Remove air duct and resonator assembly. Refer to

EM-26, "Removal and Installation"

.

6. Remove upper radiator hose from radiator.
7. Remove reservoir tank hose from radiator shroud (upper) and radiator.
8. Remove the radiator shroud (upper) bolts and remove the radiator shroud (upper). Refer to

CO-18,

"Exploded View"

.

LBIA0422E

ALBIA0470ZZ

2011 Pathfinder

ENGINE COOLING FAN

CO-23

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9. Disconnect harness connector from fan motor.
10. Remove the bolt and remove the fan grille and motor assembly.

INSTALLATION

Installation is in the reverse order of removal.

• Cooling fan is controlled by ECM. For details, refer to

EC-320, "Diagnosis Procedure"

.

AWBIA0148ZZ

2011 Pathfinder

CO-24

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WATER PUMP

WATER PUMP

Exploded View

INFOID:0000000006247858

Removal and Installation

INFOID:0000000006247859

WARNING:

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

engine coolant escaping from the radiator. 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.

CAUTION:

• When removing water pump assembly, be careful not to get engine coolant on timing chain and drive

belt.

• Water pump cannot be disassembled and should be replaced as a unit.

• After installing water pump, connect hoses and clamps securely, then check for leaks.

NOTE:

When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spill-

ing.

REMOVAL

1. Remove engine under cover. Refer to

EXT-15, "Removal and Installation"

.

2. Drain engine coolant from radiator. Refer to

CO-13, "Changing Engine Coolant"

.

CAUTION:

• Perform this step when engine is cold.

• Do not spill engine coolant on timing chain and drive belt.

3. Remove air duct and resonator assembly. Refer to

EM-26, "Removal and Installation"

.

4. Remove drive belt. Refer to

EM-14, "Removal and Installation"

.

5. Remove radiator hose (upper).
6. Remove coolant reservoir hose from the radiator.
7. Remove engine cooling fan (Motor driven type). Refer to

CO-22, "Removal and Installation (Motor driven

type)"

.

8. Set No. 1 cylinder at TDC.

1.

Water pump

2.

Timing chain tensioner (primary)

3.

Chain tensioner cover

4.

Water drain plug (front)

5.

Water pump cover

6.

O-ring

7.

O-ring

PBIC2833E

2011 Pathfinder

WATER PUMP

CO-25

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• Rotate crankshaft pulley clockwise to align timing mark (A)

(grooved line without color) with timing indicator (B).

9. Remove engine cooling fan (Crankshaft driven type). Refer to

CO-21, "Removal and Installation (Crank-

shaft driven type)"

.

10. Remove water drain plug (front) (1).

11. Remove chain tensioner cover and water pump cover from front

timing chain case, using Tool.

12. Remove timing chain tensioner (primary) as follows:
a. Loosen clip of timing chain tensioner (primary), and release

plunger stopper (1).

b. Depress plunger into tensioner body by pressing slack guide (2).
c. Keep slack guide pressed and insert stopper pin through the

tensioner body hole and plunger groove (3) to hold plunger in.

AWBIA0719ZZ

ALBIA0679ZZ

Tool number

: KV10111100 (J-37228)

PBIC2662E

PBIC2835E

2011 Pathfinder

CO-26

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WATER PUMP

d. Remove timing chain tensioner bolts and remove timing chain

tensioner (primary).

CAUTION:

Be careful not to drop timing chain tensioner bolts inside

timing chain case.

13. Remove water pump as follows:
a. Make a gap between water pump sprocket and timing chain, by

carefully turning crankshaft pulley counterclockwise until timing

chain loosens on water pump sprocket. Remove three water

pump bolts.

b. Screw M8 bolts [pitch: 1.25 mm (0.049 in) length: approx. 50

mm (1.97 in)] into water pump upper and lower bolt holes until

they reach timing chain case. Remove water pump.

CAUTION:

• Place a suitable shop cloth below the water pump hous-

ing to prevent any engine coolant from dripping into the

timing chain case.

• Pull water pump straight out while preventing vane from

contacting socket in installation area.

• Remove water pump without causing sprocket to contact

timing chain.

c.

Remove M8 bolts and O-rings from water pump.

CAUTION:

• Do not disassemble water pump.

• Do not reuse O-rings.

INSPECTION AFTER REMOVAL

• Visually check that there is no significant dirt or rusting on the

water pump body and vane.

• Check that there is no looseness in the vane shaft, and that it turns

smoothly when rotated by hand.

• If the water pump does not perform properly, replace the water

pump assembly.

INSTALLATION

1. Install new O-rings to water pump.

CAUTION:

Do not reuse O-rings.

NOTE:

PBIC2836E

PBIC2863E

JLC357B

SLC943A

2011 Pathfinder