Nissan Qashqai J11. Manual - part 165

CO-64

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OVERHEATING CAUSE ANALYSIS

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

Powertrain system malfunc-
tion

—

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

—

Installed large fog lamp

Symptom

Check items

ENGINE COOLANT

CO-65

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PERIODIC MAINTENANCE

ENGINE COOLANT

Inspection

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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

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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-67, "Flushing"

.

Refilling

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CAUTION:

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Testing pressure: Refer to 

CO-106, "Radiator"

.

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ENGINE COOLANT

• 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.

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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"

.

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ENGINE COOLANT

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9.

Stop the engine and cool down to less than approximately 50

°

C (122

°

F).

• Cool down using fan to reduce the time.
• If necessary, refill radiator up to filler neck with engine coolant.

CAUTION:

Never adhere the engine coolant to electronic equipments (alternator etc.).

10. Refill reservoir tank to “MAX” level line with engine coolant.

11. Repeat steps 7 through 10 two or more times with radiator cap installed until engine coolant level no

longer drops. 

12. Check cooling system for leakage with engine running.
13. Warm up the engine, and check for flowing noise while repeat at least three time slow acceleration from

idle up to 3,000 rpm.

14. If flowing noise is heard, bleed air from cooling system by repeating step 7 through 13 until the flowing

noise is longer heard. 

Flushing

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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.

Disconnect heater hose (1) at position (

) in the figure.

• Enhance heater as high as possible.

3.

Fill reservoir tank with water.
• When engine coolant over flows disconnected heater hose, connect heater hose, and continue filling the

engine coolant.

4.

Install radiator cap.

5.

Run the engine and warm it up to normal operating temperature.

6.

Rev the engine two or three times under no-load.

7.

Stop the engine and wait until it cools down.

8.

Drain water from the system. Refer to 

CO-65, "Draining"

.

9.

Repeat steps 1 through 8 until clear water begins to drain from radiator.

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