Nissan Xterra. Manual - part 176

ENGINE COOLING FAN

CO-19

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• Check that the fan bracket shaft turns smoothly by hand and is not

excessively loose.

• If there are 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-18, "Removal and Installation

(Crankshaft driven type)"

.

INSPECTION AFTER INSTALLATION

• Check for engine coolant leaks. Refer to 

CO-10, "System Inspection"

.

• Start and warm up engine. Visually check for coolant and A/T fluid (if equipped) leaks. Repair as necessary.

• Check and adjust engine coolant level and A/T fluid (if equipped). Refer to 

MA-12, "Fluids and Lubricants"

. 

Removal and Installation (Motor driven type)

INFOID:0000000009484587

NOTE:

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

ing.

REMOVAL

1. Partially drain engine coolant from radiator. Refer to 

CO-11, "Changing Engine Coolant"

.

CAUTION:

• Perform this step when engine is cold.

• Do not spill engine coolant on drive belts.

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

(upper) (1) and position aside. 

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

down.

3. Remove air duct and resonator assembly. Refer to 

EM-24, "Removal and Installation"

.

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

CO-15,

"Exploded View"

.

LBIA0422E

ALBIA0470ZZ

CO-20

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ENGINE COOLING FAN

7. Disconnect harness connector from fan motor.
8. 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. Refer to 

EC-376, "Diagnosis Procedure"

.

INSPECTION AFTER INSTALLATION

• Check for engine coolant leaks. Refer to 

CO-10, "System Inspection"

.

• Start and warm up engine. Visually check for coolant and A/T fluid (if equipped) leaks. Repair as necessary.

• Check and adjust engine coolant level and A/T fluid (if equipped). Refer to 

MA-12, "Fluids and Lubricants"

. 

AWBIA0148ZZ

WATER PUMP

CO-21

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WATER PUMP

Exploded View

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Removal and Installation

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WARNING:

Do not 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. Drain engine coolant from radiator. Refer to 

CO-11, "Changing Engine Coolant"

.

CAUTION:

• Perform this step when engine is cold.

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

2. Remove air duct and resonator assembly. Refer to 

EM-24, "Exploded View"

.

3. Remove drive belt. Refer to 

EM-13, "Removal and Installation"

.

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

CO-19, "Removal and Installation (Motor driven

type)"

.

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

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WATER PUMP

7. Set No. 1 cylinder at TDC.

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

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

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

CO-18, "Removal and Installation (Crank-

shaft driven type)"

.

9. Remove water drain plug (front) (1) on the water pump side of

the cylinder block.

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

timing chain case, using Tool.

11. 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.

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Tool number

: KV10111100 (J-37228)

PBIC2662E

PBIC2835E