Nissan Altima L32. Manual - part 191

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ENGINE

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SECTION 

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CONTENTS

ENGINE COOLING SYSTEM

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PRECAUTION ...............................................

3

PRECAUTIONS ...................................................

3

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................

3

Necessary for Steering Wheel Rotation After Bat-
tery Disconnect  .........................................................

3

Precaution for Liquid Gasket .....................................

3

PREPARATION ............................................

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PREPARATION ...................................................

5

Special Service Tool  .................................................

5

Commercial Service Tool  ..........................................

5

FUNCTION DIAGNOSIS ...............................

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COOLING SYSTEM ............................................

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Cooling Circuit ...........................................................

7

Schematic .................................................................

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OVERHEATING CAUSE ANALYSIS ..................

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Troubleshooting Chart ...............................................

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ON-VEHICLE MAINTENANCE ....................

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ENGINE COOLANT  ...........................................

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System Inspection ...................................................

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Changing Engine Coolant  .......................................

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ON-VEHICLE REPAIR .................................

15

RADIATOR .........................................................

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Removal and Installation .........................................

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COOLING FAN ...................................................

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Removal and Installation .........................................

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Disassembly and Assembly of Cooling Fan ............

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WATER PUMP  ...................................................

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Removal and Installation  .........................................

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THERMOSTAT AND THERMOSTAT HOUS-
ING ....................................................................

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Removal and Installation  .........................................

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WATER CONTROL VALVE ..............................

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Removal and Installation  .........................................

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SERVICE DATA AND SPECIFICATIONS 
(SDS) ............................................................

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SERVICE DATA AND SPECIFICATIONS 
(SDS) .................................................................

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Capacity ...................................................................

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Thermostat ..............................................................

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Water Control Valve  ................................................

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Radiator ...................................................................

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VQ35DE

PRECAUTION ..............................................

26

PRECAUTIONS .................................................

26

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................

26

Necessary for Steering Wheel Rotation After Bat-
tery Disconnect ........................................................

26

Precaution for Liquid Gasket  ...................................

26

PREPARATION ...........................................

28

PREPARATION .................................................

28

Special Service Tool ................................................

28

Commercial Service Tool  ........................................

28

FUNCTION DIAGNOSIS ..............................

30

COOLING SYSTEM  ..........................................

30

Cooling Circuit  .........................................................

30

Schematic ................................................................

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OVERHEATING CAUSE ANALYSIS  ................

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Troubleshooting Chart  ............................................

32

ON-VEHICLE MAINTENANCE ...................

34

ENGINE COOLANT ...........................................

34

System Inspection  ..................................................

34

Changing Engine Coolant .......................................

35

ON-VEHICLE REPAIR  ................................

38

RADIATOR ........................................................

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Removal and Installation  ........................................

38

COOLING FAN  ..................................................

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Removal and Installation  ........................................

40

Disassembly and Assembly of Cooling Fan  ...........

41

WATER PUMP ...................................................

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Removal and Installation .........................................

42

THERMOSTAT AND THERMOSTAT HOUS-
ING .....................................................................

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Removal and Installation .........................................

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WATER OUTLET AND WATER PIPING  ..........

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Removal and Installation .........................................

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SERVICE DATA AND SPECIFICATIONS 
(SDS) ..........................................................

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SERVICE DATA AND SPECIFICATIONS 
(SDS) .................................................................

50

Capacity ..................................................................

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Thermostat ..............................................................

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Radiator ..................................................................

50

PRECAUTIONS

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000004205436

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along

with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain

types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS

system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front

air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SR and SB section of this Service Man-

ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-

ness connectors.

Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000004498153

NOTE:

• Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-

tion, then disconnect both battery cables.

• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both

battery cables.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.

This vehicle is equipped with a push-button ignition switch and a steering lock unit.

If the battery is disconnected or discharged, the steering wheel will lock and cannot be turned.

If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure

below before starting the repair operation.

OPERATION PROCEDURE

1. Connect both battery cables.

NOTE:

Supply power using jumper cables if battery is discharged.

2. Carry the Intelligent Key or insert it to the key slot and turn the push-button ignition switch to ACC position.

(At this time, the steering lock will be released.)

3. Disconnect both battery cables. The steering lock will remain released with both battery cables discon-

nected and the steering wheel can be turned.

4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn

the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering

wheel will lock when the push-button ignition switch is turned to LOCK position.)

6. Perform self-diagnosis check of all control units using CONSULT-III.

Precaution for Liquid Gasket

INFOID:0000000004205437

REMOVAL OF LIQUID GASKET SEALING

• After removing nuts and bolts, separate the mating surface, using Tool and remove old liquid gasket sealing.    

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PRECAUTIONS

CAUTION:

Be careful not to damage the mating surfaces.

• Tap (1) Tool to insert it, and then slide it (2) by tapping on the side

as shown.

• In areas where Tool is difficult to use, use plastic hammer to lightly

tap the parts, to remove it.

CAUTION:

If for some unavoidable reason suitable tool such as screw-

driver is used, be careful not to damage the mating surfaces.

LIQUID GASKET APPLICATION PROCEDURE

1. Remove old liquid gasket adhering to the liquid gasket applica-

tion surface and the mating surface, Using scraper.

• Remove liquid gasket completely from the groove of the liquid

gasket application surface, bolts, and bolt holes.

2. Thoroughly clean the mating surfaces and remove adhering

moisture, grease and foreign materials.

3. Attach liquid gasket tube to Tool.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-15, "Recommended Chemical Products and Sealants"

.

4. Apply liquid gasket without breaks to the specified location with

the specified dimensions.

• If there is a groove for the liquid gasket application, apply liq-

uid gasket to the groove.

• As for the bolt holes, normally apply liquid gasket inside the

holes. Occasionally, it should be applied outside the holes.

Make sure to read the text of service manual.

• Within five minutes of liquid gasket application, install the mat-

ing component.

• If liquid gasket protrudes, wipe it off immediately.

• Do not retighten nuts or bolts after the installation.

• After 30 minutes or more have passed from the installation, fill

engine oil and engine coolant.

CAUTION:

If there are specific instructions in this manual, observe them.

Tool number

: KV10111100 (J-37228)

WBIA0566E

PBIC0003E

Tool number

: WS39930000 ( — )

WBIA0567E

SEM159F