Qashqai J11. Engine cooling system - part 3

DESCRIPTION

CO-33

< SYSTEM DESCRIPTION >

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M/T models

JPBIA6909ZZ

Water pump

Thermostat

Water inlet

Water inlet

Oil cooler

Water control valve

Water outlet

From radiator

To radiator

From heater

To heater

CO-34

< SYSTEM DESCRIPTION >

[MR20DD]

DESCRIPTION

Engine Cooling System Schematic

INFOID:0000000010665070

CVT models

JPBIA6910GB

DESCRIPTION

CO-35

< SYSTEM DESCRIPTION >

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M/T models

JPBIA6911GB

CO-36

< SYMPTOM DIAGNOSIS >

[MR20DD]

OVERHEATING CAUSE ANALYSIS

SYMPTOM DIAGNOSIS

OVERHEATING CAUSE ANALYSIS

Troubleshooting Chart

INFOID:0000000010665071

Symptom

Check items

Cooling sys-
tem parts 
malfunction

Poor heat transfer

Water pump malfunction

Worn or loose drive belt

—

Thermostat and water con-
trol valve stuck closed

—

Damaged fins

Dust contamination or pa-
per clogging

Physical damage

Clogged radiator cooling 
tube

Excess foreign material 
(rust, dirt, sand, etc.)

Reduced air flow

Cooling fan does not oper-
ate

Fan assembly

—

High resistance to fan rota-
tion

Damaged fan blades

Damaged radiator shroud

—

—

—

Improper engine coolant 
mixture ratio

—

—

—

Poor engine coolant quality

—

Engine coolant viscosity

—

Insufficient engine coolant

Engine coolant leakage

Cooling hose

Loose clamp

Cracked hose

Water pump

Poor sealing

Reservoir tank cap

Loose

Poor sealing

Radiator

O-ring for damage, deterio-
ration or improper fitting

Cracked radiator tank

Cracked radiator core

Reservoir tank

Cracked reservoir tank

Overflowing reservoir tank

Exhaust gas leakage into 
cooling system

Cylinder head deterioration

Cylinder head gasket deteri-
oration

OVERHEATING CAUSE ANALYSIS

CO-37

< SYMPTOM DIAGNOSIS >

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Except cool-
ing system 
parts mal-
function

—

Overload on engine

Abusive driving

High engine rpm under no 
load

Driving in low gear for ex-
tended time

Driving at extremely high 
speed

Power train system mal-
function

—

Installed improper size 
wheels and tires

Dragging brakes

Improper ignition timing

Blocked or restricted air 
flow

Blocked bumper

—

—

Blocked radiator grille

Installed car brassiere

Mud contamination or paper 
clogging

Blocked radiator

—

Blocked condenser

Blocked air flow

Installed large fog lamp

Symptom

Check items

CO-38

< PERIODIC MAINTENANCE >

[MR20DD]

ENGINE COOLANT

PERIODIC MAINTENANCE

ENGINE COOLANT

Inspection

INFOID:0000000010675878

LEVEL 

• Check if the reservoir tank engine coolant level is within the “MIN”

to “MAX” when the engine is cool.

• Adjust the engine coolant level as necessary.
• Check that the reservoir tank cap is tightened.

WARNING:

Never remove reservoir tank cap when engine is hot. Serious
burns could occur from high-pressure engine coolant escaping
from reservoir tank.

LEAKAGE

• To check for leakage, fit the adapter (B) to the reservoir tank, and

then connect it to the reservoir tank cap tester [SST: — (M.S.554-
07)] (A) as shown.

WARNING:

Never remove reservoir tank cap when engine is hot. Serious
burns could occur from high-pressure engine coolant escap-
ing from reservoir tank.

CAUTION:

Higher test pressure than specified may cause radiator dam-
age.

• If anything is found, repair or replace damaged parts.

Draining

INFOID:0000000010675879

WARNING:

• Never remove radiator cap when engine is hot. Serious burns may occur from high-pressure engine

coolant escaping from radiator. 

• Wrap a thick cloth around the radiator cap. Slowly turn it a quarter of a turn to release built-up pres-

sure. Then turn it all the way.

1.

Remove engine under cover.

2.

Remove reservoir tank cap.

3.

Open radiator drain plug (1) of radiator. 

CAUTION:

Perform this step when engine is cold.

4.

Remove reservoir tank if necessary, and drain engine coolant
and clean reservoir tank before installing. Refer to 

CO-17,

"Exploded View"

.

5.

Check drained engine coolant for contaminants such as rust,
corrosion or discoloration. If contaminated, flush the engine
cooling system. Refer to 

CO-40, "Flushing"

.

Refilling

INFOID:0000000010675880

CAUTION:

E1BIA1145ZZ

Testing pressure: Refer to 

CO-106, "Radiator"

.

E1BIA1147ZZ

: Vehicle front

E1BIA1139ZZ

ENGINE COOLANT

CO-39

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• Never put additive such as waterleak preventive, since it may cause cooling waterway clogging.
• When refilling use Genuine NISSAN Long Life Antifreeze/Coolant (blue) or equivalent in its quality

mixed with water (distilled or demineralized). Refer to 

MA-59, "Fluids and Lubricants"

.

1.

Install reservoir tank if removed and radiator drain plug (1).

CAUTION:

Be sure to clean drain plug and install with new O-ring.

2.

Check that each hose clamp has been firmly tightened.

3.

Disconnect heater hose (1) at position (

) in the figure.

• Enhance heater hose as high as possible.

4.

Fill reservoir tank with engine coolant.

CAUTION:

Never adhere the engine coolant to electronic equipments (alternator etc.).
• Pour coolant slowly of less than 3   (2-5/8 Imp qt) per minute to allow air in system to escape.

•

5.

When engine coolant spill from heater hose with continuous
flow, connect heater hose and continue filling reservoir tank until
reach “MAX” level 

6.

7.

Install radiator cap.

8.

Warm up engine at 3000 rpm until thermostat is opened.
• Check thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.

CAUTION:

Watch water temperature gauge so as not to overheat engine.

E1BIA1139ZZ

: Vehicle front

JPBIA4208ZZ

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

 Refer to 

CO-81, "Periodical Maintenance Specifica-

tion"

.

A

:  MAX

B

:  MIN

Reservoir tank engine coolant capacity 
(At “MAX” level)

Refer to 

CO-81, "Periodical Maintenance Specification"

.

JPBIA0102ZZ

RESERVOIR TANK CAP

CO-41

< PERIODIC MAINTENANCE >

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RESERVOIR TANK CAP

Inspection

INFOID:0000000010675882

• Fit the adapter to the reservoir tank cap tester [SST: — (M.S. 554-

07)] (A) as shown.

• When connecting the reservoir tank cap to the reservoir tank cap

tester, apply water or LLC to the reservoir tank cap seal part.

• Check reservoir tank cap relief pressure.

• Replace the reservoir tank cap if the engine coolant passes

through it, or if any fur signs is detected.

CAUTION:

When installing reservoir tank cap, thoroughly wipe out the res-
ervoir tank filler neck to remove any waxy residue or foreign
material.

Standard: Refer to 

CO-106, "Radiator"

.

E1BIA0057ZZ

CO-42

< PERIODIC MAINTENANCE >

[MR20DD]

RADIATOR

RADIATOR

Inspection

INFOID:0000000010675883

Check radiator for mud or clogging. If necessary, clean radiator as follows.

CAUTION:

• Never bend or damage the radiator fins.
• When radiator is cleaned without removal, remove all surrounding parts such as radiator fan, radia-

tor shroud and horns. Then tape the harness and connectors to prevent water from entering.

1.

Apply water by hose to the back side of the radiator core vertically downwards.

2.

Apply water again to all radiator core surface once per minute.

3.

Stop washing if any stains no longer flow out from the radiator.

4.

Blow air into the back side of radiator core vertically downwards.

• Use compressed air lower than 490 kPa (4.9 bar 5 kg/cm

2

, 71psi) and keep distance more than 30 cm (11.8

in). 

5.

 Blow air again into all the radiator core surface once per minute until no water sprays out.

RADIATOR

CO-43

< REMOVAL AND INSTALLATION >

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REMOVAL AND INSTALLATION

RADIATOR

Exploded View

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Removal and Installation

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REMOVAL

WARNING:

• Never remove reservoir tank cap when engine is hot. Serious burns may occur from high-pressure

engine coolant escaping from radiator. 

Radiator core support

Radiator hose (upper)

Radiator hose (lower)

Cooling fan assembly

Clip

Air guide (LH)

Mounting rubber

Radiator

Air guide (Lower)

Air guide (RH)

Plate-air guide

Radiator mounting bracket

Bolt

E1BIA1180GB

CO-44

< REMOVAL AND INSTALLATION >

[MR20DD]

RADIATOR

• Wrap a thick cloth around the reservoir tank cap. Slowly turn it a quarter of a turn to release built-up

pressure. Then turn it all the way.

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

1.

Drain engine coolant from radiator. Refer to 

CO-11, "Draining"

.

CAUTION:

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

2.

Remove front bumper. Refer to 

EXT-19, "Removal and Installation"

.

3.

Put aside bumper reinforcement with harness assembly.

4.

Remove:
• Radiator air guide RH 

.

• Radiator air guide LH 

.

• Radiator air guide lower 

.

• Radiator bracket mounting upper 

.

5.

Put aside radiator core support upper. Refer to 

DLK-335, "MR20DD : Removal and Installation"

 (Type 2),

DLK-604, "MR20DD : Removal and Installation"

 (Type 4), 

DLK-785, "MR20DD : Removal and Installation"

(Type 5), 

DLK-926, "MR20DD : Removal and Installation"

 (Type 6).

6.

Remove plate-air guide.

7.

Separate condenser from radiator.

8.

Remove radiator hose (upper and lower).

9.

Disconnect harness connectors from cooling fan, and move harness aside.

10. Remove radiator and cooling fan assembly.

CAUTION:

Be careful not to damage radiator core and condenser  core.
NOTE:
In case of lower pin radiator is damaged, it can be repaired instead of replacing the radiator.

11. Separate radiator from condenser.

INSTALLATION

Install in the reverse order of removal.

CAUTION:

Do not reuse O-rings.

Radiator

NOTE:

E1BIA1181ZZ

RADIATOR

CO-45

< REMOVAL AND INSTALLATION >

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When installing radiator core support (upper), check that both upper and lower mounts of radiator are inserted
in the mounting holes of radiator core support (upper, lower).

CAUTION:

Use genuine mounting bolts for the cooling fan assembly and strictly observe the tightening torque.
(Breakage prevention for radiator)

Radiator hose

NOTE:
Insert the radiator hose 

 all the way to the stopper 

 or by 33 mm (1.30 in) (hose without a stopper).

• For the orientation of the hose clamp pawl, refer to the figure.

*: Refer to the illustrations for the specific position each hose clamp tab.

• The angle (b) created by the hose clamp pawl and the specified

line (A) must be within 

±

30 as shown in the figure.

Unit:  mm (in)

A.

Radiator side

B.

Engine side

Radiator hose

Hose end

Paint mark

Position of hose clamp*

Radiator hose (upper)

Radiator side

Upper

A

Engine side

Upper

B

Radiator hose (lower)

Radiator side

Lower

C

Engine side

Upper

D

E.

View E

f.

45

°

g.

45

°

: Vehicle upper

JPBIA4294GB

JPBIA3911ZZ

JPBIA4295ZZ

CO-46

< REMOVAL AND INSTALLATION >

[MR20DD]

RADIATOR

• To install hose clamps 

, check that the dimension (A) from the

end of the hose clamp on the radiator hose to the hose clamp is
within the reference value.

Inspection

INFOID:0000000010665080

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-41, "Inspection"

.

• Start and warm up the engine. Visually check that there is no leakage of engine coolant.

Dimension “A”

: 3 mm (0.12 in)

JSBIA0241ZZ

COOLING FAN

CO-47

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COOLING FAN

Exploded View

INFOID:0000000010675844

Refer to 

GI-4, "Components"

 for symbol marks in the figure.

Removal and Installation

INFOID:0000000010675845

REMOVAL

1.

Drain engine coolant from radiator. Refer to 

CO-11, "Draining"

.

CAUTION:

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

2.

Remove front bumper. Refer to 

EXT-19, "Removal and Installation"

.

3.

Remove radiator hose (upper) from radiator.

4.

Remove radiator core support upper. Refer to 

DLK-335, "MR20DD : Removal and Installation"

 (Type 2),

DLK-604, "MR20DD : Removal and Installation"

 (Type 4), 

DLK-785, "MR20DD : Removal and Installation"

(Type 5), 

DLK-926, "MR20DD : Removal and Installation"

 (Type 6).

5.

Disconnect harness connectors from cooling fan, and move harness to aside.

6.

Remove cooling fan assembly.

CAUTION:

Be careful not to damage or scratch on radiator core when removing.

INSTALLATION

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

CAUTION:

Only use genuine parts for fan shroud mounting bolt and observe the specified torque (to prevent
radiator from being damaged).
NOTE:

Fan shroud

Fan motor

Resistor

Radiator

E1BIA1117GB

CO-48

< REMOVAL AND INSTALLATION >

[MR20DD]

COOLING FAN

Cooling fan is controlled by ECM. For details, Refer to 

ECH-31, "COOLING FAN CONTROL : System Descrip-

tion"

.

Disassembly and Assembly

INFOID:0000000010675859

DISASSEMBLY

1.

Remove cooling fan mounting nut, and then remove the cooling fan.

2.

Remove fan motor.

ASSEMBLY

Note the following, and assemble in the reverse order of disassembly.
• Apply genuine high strength thread locking sealant on fan motor shaft.

Inspection

INFOID:0000000010665084

INSPECTION AFTER DISASSEMBLY

Cooling Fan

Inspect cooling fan for crack or unusual bend.
• If anything is found, replace cooling fan.

WATER PUMP

CO-49

< REMOVAL AND INSTALLATION >

[MR20DD]

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WATER PUMP

Exploded View

INFOID:0000000010665085

Removal and Installation

INFOID:0000000010665086

REMOVAL

1.

Drain engine coolant from radiator. Refer to 

CO-38, "Draining"

.

CAUTION:

Perform this step when the engine is cold.

2.

Remove front wheel (RH). Refer to 

WT-60, "Removal and Installation"

 (with TPMS) or 

WT-73, "Removal

and Installation"

 (without TPMS).

3.

Remove front fillet molding (RH). Refer to 

EXT-37, "Removal and Installation"

.

4.

Remove front fender protector. Refer ro 

EXT-32, "Removal and Installation"

.

5.

Remove drive belts. Refer to 

EM-139, "Removal and Installation"

.

6.

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

CAUTION:

• Handle water pump vane so that it does not contact any other parts.
• Water pump cannot be disassembled and should be replaced as a unit.

INSTALLATION

Install in the reverse order of removal.

Inspection

INFOID:0000000010665087

INSPECTION AFTER REMOVAL

Pulley

Water pump

Gasket

: Always replace after every disassembly.

: N·m (kg-m, ft-lb)

: N·m (kg-m, in-lb)

JSBIA1603GB