Nissan Maxima. Manual - part 301

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< REMOVAL AND INSTALLATION >

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COOLING FAN

COOLING FAN

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

coolant escaping from the radiator. Wrap a thick cloth around the radiator cap. Slowly turn it a quarter

turn to allow built-up pressure to escape. Carefully remove the 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. Partially drain engine coolant from radiator. Refer to 

CO-11, "Changing Engine Coolant"

.

CAUTION:

Perform when engine is cold.

2. Remove engine room cover. Refer to 

EM-23, "Removal and Installation"

.

3. Remove TCM. Refer to 

TM-168, "Removal and Installation"

.

4. Remove battery tray. Refer to 

PG-68, "Removal and Installation (Battery Tray)"

.

5. Disconnect radiator hose (upper).
6. Disconnect the harness connectors from the radiator cooling fan motor.
7. Remove radiator cooling fan assembly.

INSTALLATION

Installation is in the reverse order of removal.

• Radiator cooling fans are controlled by ECM. Refer to 

EC-486, "Description"

.

1.

Radiator cooling fan assembly

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WATER PUMP

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WATER PUMP

Exploded View

INFOID:0000000009469269

Removal and Installation

INFOID:0000000009469270

WARNING:

Do not remove the radiator cap when the engine is hot. Serious burns could occur from high pressure

coolant escaping from the radiator. Wrap a thick cloth around the radiator cap. Slowly turn it a quarter

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

CAUTION:

• When removing water pump assembly, be careful not to get coolant on drive belt.

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

• After installing water pump, connect hose and clamp securely, then check for leaks using suitable

tool.

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 the radiator. Refer to 

CO-11, "Changing Engine Coolant"

.

CAUTION:

Perform when the engine is cold.

2. Disconnect reservoir hose and remove reservoir tank. 
3. Remove RH wheel and tire using power tool. Refer to 

WT-60, "Adjustment"

.

4. Remove the fender protector side cover (RH). Refer to 

EXT-23, "Exploded View"

.

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1.

Water pump

2.

O-rings

3.

Timing chain tensioner

4.

Intake valve timing control sole-
noid valve cover (RH) (bank 1)

5.

Water pump cover

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WATER PUMP

5. Set No. 1 cylinder at TDC on its compression stroke.

• Align pointer with TDC mark on crankshaft pulley.

6. Remove drive belt. Refer to 

EM-14, "Removal and Installation"

.

7. Remove the idler pulley and the A/C idler pulley. Refer to 

EM-15, "Removal and Installation of Drive Belt

Auto-tensioner"

.

8. Remove hoodledge cover (RH).
9. Remove cylinder block front drain plug (1) on water pump side

of cylinder block to drain engine coolant from engine.

10. Support engine and remove the front engine insulator and bracket. Refer to 

EM-103, "Removal and Instal-

lation"

.

11. Disconnect RH valve timing control harness connectors and remove Intake valve timing control solenoid

valve cover (RH) (bank 1). Refer to 

EM-54, "Exploded View"

.

12. Remove water pump cover. Refer to 

EM-54, "Exploded View"

.

13. Remove the timing chain tensioner (primary) as follows:
a. Pull the lever (C) down to release the plunger stopper tab (B).
b. Insert the stopper pin A into the tensioner body hole to hold the

lever (C) and keep the plunger stopper tab (B) released.

NOTE:

An allen wrench [1.2 mm (0.047 in)] is used for a stopper pin A

as an example.

c.

Compress the plunger (D) into the tensioner body (1) by press-

ing the slack guide (2).

d. Keep the slack guide (2) pressed and lock the plunger (D) in by

pushing the stopper pin A through the lever (C) and into the

chain tensioner body hole.

e. Remove timing chain tensioner bolts and then remove the timing chain tensioner.

CAUTION:

Be careful not to drop timing chain tensioner bolts inside timing chain case.

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14. Remove the three water pump bolts (A). Make a gap between

water pump sprocket (1) and timing chain, by carefully turning

crankshaft pulley (2) counterclockwise until timing chain loosens

on water pump sprocket (1).

15. Screw M8 bolts [pitch: 1.25 mm (0.49 in) length: approx. 50 mm

(1.97 in)] into water pumps upper and lower bolt holes until they

reach the 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.

16. Remove M8 bolts and O-rings from water pump.

CAUTION:

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 the vane shaft is not excessively loose 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.

2. Apply engine oil and coolant to the O-rings as shown.

• Locate the O-ring with white paint mark to engine front side.

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JLC357B

SLC943A

PBIC0855E