Nissan X-Trail 32. Manual - part 300

CO-26

< REMOVAL AND INSTALLATION >

[MR20DD]

THERMOSTAT

THERMOSTAT

Exploded View

INFOID:0000000010782945

Removal and Installation

INFOID:0000000010782946

REMOVAL

1.

Remove engine under cover. Refer to 

EXT-39, "ENGINE UNDER COVER : Exploded View"

.

2.

Drain engine coolant from radiator. Refer to 

CO-13, "Draining"

. 

CAUTION:

Perform this step when engine is cold.

3.

Disconnect radiator hose (lower) from water inlet. Refer to 

CO-17, "Exploded View"

.

4.

Remove water inlet and thermostat.
• Engine coolant leakage from cylinder block, so have a receptacle ready below.

5.

Disconnect the battery cable from the negative terminal. Refer to 

PG-140, "EXCEPT FOR R9M :

Exploded View"

.

6.

Remove thermostat housing with the following procedure:

a.

Remove water pump. Refer to 

CO-24, "Exploded View"

.

b.

Remove alternator. Refer to 

CHG-44, "MR20DD : Exploded View"

.

c.

Remove A/C compressor with A/C piping connected, and temporarily fasten it on vehicle with a rope.
Refer to 

HA-76, "Exploded View"

.

Thermostat housing

Gasket

Rubber ring

Thermostat

Water inlet

To oil cooler

To radiator

: Engine front

: Always replace after every disassembly.

: N·m (kg-m, ft-lb)

JSBIA4314GB

THERMOSTAT

CO-27

< REMOVAL AND INSTALLATION >

[MR20DD]

C

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d.

Remove water hoses. Refer to 

LU-13, "Exploded View"

.

e.

Remove thermostat housing.

INSTALLATION

Note the following, and install in the reverse order of removal.

Thermostat 

• Install thermostat with making rubber ring 

 groove fit to thermo-

stat flange 

 with the whole circumference. 

• Install thermostat 

 with jiggle valve 

 facing upwards. 

Inspection

INFOID:0000000010782947

INSPECTION AFTER REMOVAL

Thermostat

• Place a thread 

 so that it is caught in the valves of thermostat 

.

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 valve lift amount.
• After checking the maximum valve lift amount, lower the water

temperature and check the valve closing temperature. 

• If out of the standard, replace thermostat.

INSPECTION AFTER INSTALLATION

• Check for leakage of engine coolant using the radiator cap tester adapter (commercial service tool) and the

radiator cap tester (commercial service tool). Refer to 

CO-13, "Inspection"

.

• Start and warm up the engine. Check visually that there is no leakage of engine coolant.

JPBIA5191ZZ

: Thermostat housing

PBIC3548J

Standard: Refer to 

CO-31, "Thermostat"

.

PBIC3314J

CO-28

< REMOVAL AND INSTALLATION >

[MR20DD]

WATER OUTLET

WATER OUTLET

Exploded View

INFOID:0000000010782948

Removal and Installation

INFOID:0000000010782949

REMOVAL

1.

Drain engine coolant from radiator. Refer to 

CO-13, "Draining"

.

CAUTION:

• Perform this step when engine is cold.
• Never spill engine coolant on drive belts.

2.

Remove air duct 1 and air duct 2. Refer to 

EM-30, "Exploded View"

.

3.

Remove battery. Refer to 

PG-140, "EXCEPT FOR R9M : Exploded View"

.

4.

Remove battery tray. Refer to 

PG-146, "EXCEPT FOR R9M : Exploded View"

.

5.

Disconnect radiator hose (upper) form water outlet. Refer to 

CO-17, "Exploded View"

.

6.

Disconnect harness connector from engine coolant temperature sensor.

Water control valve

Rubber ring

Water outlet

Engine coolant temperature sensor

Clamp

Water hose

Water hose

To radiator

To CVT oil warmer (CVT models)

To heater

To heater

: Engine front

: Always replace after every disassembly.

: N·m (kg-m, ft-lb)

: Indicates that the part is connected at points with same symbol in actual vehicle.

JPBIA6912GB

WATER OUTLET

CO-29

< REMOVAL AND INSTALLATION >

[MR20DD]

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7.

Remove heater hoses 

 and water hose 

 (CVT models).

8.

Remove water outlet.

INSTALLATION

Note the following, and install in the reverse order of removal.

Water Control Valve

• Install water control valve with making rubber ring 

 groove fit to

water control valve flange 

 with the whole circumference.

• Install water control valve 

 with the arrow 

 facing up and the

frame center part 

 facing upwards.

Inspection

INFOID:0000000010782950

INSPECTION AFTER REMOVAL

Water Control Valve

• Place a thread 

 so that it is caught in the valves of water control

valve 

. 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 continuous valve lifting toward maxi-

mum valve lift.
NOTE:
The maximum valve lift amount standard temperature for water
control valve is the reference value.

• After checking the maximum valve lift amount, lower the water

temperature and check the valve closing temperature. 

: Water outlet

JPBIA6844ZZ

JPBIA5193ZZ

: Water outlet

JPBIA5194ZZ

PBIC3314J