Nissan Pathfinder (2012 year). Manual - part 129

WATER INLET AND THERMOSTAT ASSEMBLY

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8. Remove water inlet and thermostat assembly.

CAUTION:

• Do not disassemble water inlet and thermostat assembly. 

• Replace water inlet and thermostat assembly as a unit.

INSPECTION AFTER REMOVAL

1. Check valve seating condition at room temperature. It should seat tightly.
2. Check valve operation.

• Place a thread so that it is caught in the valve of the thermo-

stat. Immerse fully in a container filled with water. Heat while

stirring.

• The valve opening temperature is the temperature at which

the valve opens and falls from the thread. 

• Continue heating. Check the full-open lift amount.

NOTE:

The full-open lift amount standard temperature is the reference

value.

• After checking the full-open lift amount, lower the water tem-

perature and check the valve closing temperature.

If valve seating at measured values are out of standard range, replace water inlet and thermostat assembly.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

Do not spill engine coolant in engine room. Use a shop cloth to absorb engine coolant.

INSPECTION AFTER INSTALLATION

• Check for coolant leaks. Refer to 

CO-11, "System Inspection"

.

• Start and warm up engine. Visually check for coolant leaks. Repair as necessary.

SLC962AB

SLC949A

Thermostat

Standard

Valve opening temperature

Refer to 

CO-32, "Standard and Limit"

Full-open lift amount

Refer to 

CO-32, "Standard and Limit"

Valve closing temperature

Refer to 

CO-32, "Standard and Limit"

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WATER OUTLET AND WATER PIPING

WATER OUTLET AND WATER PIPING

Exploded View

INFOID:0000000007357919

Removal and Installation

INFOID:0000000007357920

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. Drain engine coolant from radiator. Refer to 

CO-12, "Changing Engine Coolant"

.

CAUTION:

• Perform this step when engine is cold.

• Do not spill engine coolant on drive belts.

2. Remove the intake manifold collector. Refer to 

EM-27, "Removal and Installation"

.

3. Remove engine coolant temperature sensor as necessary.

CAUTION:

Be careful not to damage engine coolant temperature sensor.

4. Remove water outlet, heater pipe, water bypass hoses and water pipe.

INSTALLATION

1.

Engine coolant temperature sensor

2.

Washer

3.

Water outlet

4.

Heater hose

5.

O-ring

6.

Water pipe

7.

Water hose

8.

Radiator hose (upper)

9.

Water hose

10. Water hose

11. Gasket

12. Heater pipe

13. Heater hose

14. Gasket

WBIA0615E

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WATER OUTLET AND WATER PIPING

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Installation is in the reverse order of removal, paying attention to the following.

• Securely insert each hose, and install clamp at a position where it does not interfere with the pipe bulge.

• Before inserting water pipe into water outlet, apply mild soap to O-ring.

CAUTION:

Do not reuse O-ring.

INSPECTION AFTER INSTALLATION

• Check for engine coolant leaks. Refer to 

CO-11, "System Inspection"

.

• Start and warm up engine. Visually check for coolant leaks. Repair as necessary.

• Check and adjust engine coolant level.

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SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)

Standard and Limit

INFOID:0000000007357921

ENGINE COOLANT CAPACITY (APPROXIMATE)

Unit:   (US qt, Imp qt)

RADIATOR

Unit: kPa (kg/cm

2

, psi)

THERMOSTAT

Engine coolant capacity (With reservoir tank at 
“MAX” level)

Without rear A/C

10.2 (10-3/4, 9)

With rear A/C

13.4 (14-1/8, 11-3/4)

Reservoir cap relief pressure

Standard

98 - 118 (1.0 - 1.2, 14 - 17)

Test pressure

137 (1.4, 20)

Valve opening temperature

80.5 - 83.5

°

C (177 - 182

°

F)

Full-open lift amount

8.6 mm / 95

°

C (0.339 in / 203

°

F)

Valve closing temperature

77

°

C (171

°

F)

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PRECAUTIONS

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PRECAUTION

PRECAUTIONS

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

INFOID:0000000007357922

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.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000007357923

NOTE:

• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-

TEM).

• Remove and install all control units after disconnecting both battery cables with the ignition knob in the

″

LOCK

″

 position.

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

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

For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-

anism is adopted on the key cylinder.

For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and

steering wheel rotation will become impossible.

If steering wheel rotation is required when battery power is interrupted, 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. Use the Intelligent Key or mechanical key to turn the ignition switch to the 

″

ACC

″

 position. At this time, the

steering lock will be released.

3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be

rotated.

4. Perform the necessary repair operation.

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PRECAUTIONS

5. When the repair work is completed, return the ignition switch to the 

″

LOCK

″

 position before connecting

the battery cables. (At this time, the steering lock mechanism will engage.)

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

Precaution for Liquid Gasket

INFOID:0000000007357924

REMOVAL OF LIQUID GASKET 

• After removing the bolts and nuts, separate the mating surface and

remove the old liquid gasket using Tool.

CAUTION:

Do not damage the mating surfaces.

• Tap the seal cutter to insert it (1).

• In areas where the Tool is difficult to use, lightly tap to slide it (2).

LIQUID GASKET APPLICATION PROCEDURE

1. Remove the old liquid gasket adhering to the gasket application

surface and the mating surface using suitable tool.

• Remove the 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 material.

3. Attach the liquid gasket tube to the Tool.

Use Genuine RTV Silicone Sealant or equivalent. Refer to

GI-14, "Recommended Chemical Products and Sealants"

. 

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

with the specified dimensions.

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

liquid gasket to the groove.

• Normally apply the liquid gasket on the inside edge of the bolt

holes. Also apply to the outside edge of the bolt holes when

specified in the procedure.

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

ing component.

• If the liquid gasket protrudes, wipe it off immediately.

• Do not retighten after the installation.

• Wait 30 minutes or more after installation before refilling the

engine with oil or coolant.

CAUTION:

Carefully follow all of the warnings, cautions, notes, and procedures contained in this manual.

Tool number

: KV10111100 (J-37228)

WBIA0566E

PBIC0003E

Tool number

: WS39930000 ( — )

WBIA0567E

SEM159F

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PREPARATION

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PREPARATION

PREPARATION

Special Service Tool

INFOID:0000000007357925

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number
(Kent-Moore No.)
Tool name

Description

KV10111100
(J-37228)
Seal cutter

Removing steel oil pan and rear timing chain 
case

WS39930000
( — )
Tube presser

Pressing the tube of liquid gasket

EG17650301
(J-33984-A)
Radiator cap tester adapter

Adapting radiator cap tester to radiator cap 
and radiator filler neck

a: 28 (1.10) diameter
b: 31.4 (1.236) diameter
c: 41.3 (1.626) diameter

Unit: mm (in)

KV991J0070
(J-45695)
Coolant refill tool

Refilling engine cooling system

KV991J0010
(J-23688)
Engine coolant refractometer

Checking concentration of ethylene glycol in 
engine coolant

—

(J-24460-92)
Radiator Pressure Test Adapter

Pressure testing of the pressurized cooling 
system overflow tank

NT046

S-NT052

S-NT564

LMA053

WBIA0539E

AWBIA0891ZZ

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PREPARATION

Commercial Service Tool

INFOID:0000000007357926

Tool name

Description

Power tool

Loosening screws, bolts and nuts

Radiator cap tester

Checking radiator and radiator cap

PIIB1407E

PBIC1982E

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2012 Pathfinder