Nissan Juke (2014 year). Service Repair Manual — part 44
DESCRIPTION
CO-5
< SYSTEM DESCRIPTION >
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Engine Cooling System Schematic
INFOID:0000000009749823
M/T models
CVT models
JPBIA4335GB
JPBIA4334GB
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CO-6
< SYMPTOM DIAGNOSIS >
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OVERHEATING CAUSE ANALYSIS
SYMPTOM DIAGNOSIS
OVERHEATING CAUSE ANALYSIS
Troubleshooting Chart
INFOID:0000000009749824
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
Radiator 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
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OVERHEATING CAUSE ANALYSIS
CO-7
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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
Revision: 2013 October
2014 JUKE
CO-8
< PERIODIC MAINTENANCE >
[MR16DDT ]
ENGINE COOLANT
PERIODIC MAINTENANCE
ENGINE COOLANT
Inspection
INFOID:0000000009749825
LEVEL
• Check that the reservoir tank engine coolant level is within the
“MIN” to “MAX” when the engine is cool.
• Adjust the engine coolant level if necessary.
CAUTION:
Refill Genuine NISSAN Long Life Antifreeze/Coolant (blue) or
equivalent in its quality mixed with water (distilled or deminer-
alized). Refer to
MA-10, "Fluids and Lubricants"
LEAKAGE
• To check for leakage, apply pressure to the cooling system with the
radiator cap tester (commercial service tool) (A) and the radiator
cap tester adapter (commercial service tool) (B).
WARNING:
Never remove radiator cap when engine is hot. Serious burns
may occur from high-pressure engine coolant escaping from
engine cooling system.
CAUTION:
Higher test pressure than specified may cause radiator dam-
age.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.
• If anything is found, repair or replace damaged parts.
Draining
INFOID:0000000009749826
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.
Connect drain hose.
• Use a genera-purpose hose with the dimensions show in the
figure.
A
: MAX
B
: MIN
JPBIA0102ZZ
Testing pressure: Refer to
PBIC5121J
A
:
φ
8 mm (0.31 in)
B
: 300 mm (11.81 in)
JPBIA4770ZZ
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ENGINE COOLANT
CO-9
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2.
Open radiator drain plug (A) at the bottom of radiator, and then
remove radiator cap.
CAUTION:
Perform this step when engine is cold.
• When draining all of engine coolant in the system, open water
drain plugs on cylinder block. Refer to
3.
Remove reservoir tank if necessary, and drain engine coolant and clean reservoir tank before installing.
Refer to
4.
Check drained engine coolant for contaminants such as rust, corrosion or discoloration. If contaminated,
flush the engine cooling system. Refer to
.
5.
Disconnect drain hose.
Refilling
INFOID:0000000009749827
CAUTION:
• Do not reuse O-rings.
• Do not 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-10, "Fluids and Lubricants"
1.
Install reservoir tank if removed, and install radiator drain plug.
CAUTION:
Be sure to clean drain plug and install with new O-ring.
• If water drain plugs on cylinder block are removed, close and tighten them. Refer to
2.
Check that each hose clamp has been firmly tightened.
3.
Remove air duct (suction side). Refer to
4.
Disconnect vacuum hose break booster side, and removal vacuum tube from clamp. Refer to
5.
Disconnect heater hose (1) at position (
) in the figure.
• Enhance heater hose as high as possible.
6.
Fill radiator (1) to specified level.
CAUTION:
Never adhere the engine coolant to electronic equipments
(alternator etc.).
• Pour coolant slowly of less than 2 (2-1/8 US qt, 1-3/4
Imp qt) a minute to allow air in system to escape.
• When engine coolant overflows disconnected heater
hose, connect heater hose, and continue filling the engine
coolant.
: Vehicle front
JPBIA4452ZZ
Radiator drain plug
: Refer to
: Vehicle front
JPBIA4453ZZ
JPBIA0819ZZ
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CO-10
< PERIODIC MAINTENANCE >
[MR16DDT ]
ENGINE COOLANT
7.
Refill reservoir tank to “MAX” level line with engine coolant.
8.
Install air duct (suction side). Refer to
9.
Install radiator cap.
10. Warm up engine until opening thermostat. Standard for warming-up time is approximately 10 minutes at
3,000 rpm.
• 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.
11. 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.).
12. Refill reservoir tank to “MAX” level line with engine coolant.
13. Repeat steps 6 through 11 two or more times with radiator cap installed until engine coolant level no
longer drops.
14. Check cooling system for leakage with engine running.
15. Warm up the engine, and check for sound of engine coolant flow while running engine from idle up to
3,000 rpm with heater temperature controller set at several position between “COOL” and “WARM”.
• Sound may be noticeable at heater unit.
16. Repeat step 15 three times.
17. If sound is heard, bleed air from cooling system by repeating step 6 through 11 until reservoir tank level no
longer drops.
Flushing
INFOID:0000000009749828
1.
Install radiator drain plug.
CAUTION:
Be sure to clean drain plug and install with new O-ring.
• If water drain plugs on cylinder block are removed, close and tighten them. Refer to
2.
Remove air duct (suction side), air cleaner cover assembly and air cleaner body assembly. Refer to
3.
Disconnect vacuum hose break booster side, and remove vacuum tube from clamp. Refer to .
Engine coolant capacity
(With reservoir tank at “MAX” level)
Refer to
CO-27, "Periodical Maintenance Specifica-
.
A
: MAX
B
: MIN
Reservoir tank engine coolant capacity
(At “MAX” level)
Refer to
CO-27, "Periodical Maintenance Specification"
JPBIA0102ZZ
Radiator drain plug
: Refer to
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ENGINE COOLANT
CO-11
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4.
Disconnect heater hose (1) at position (
) in the figure.
• Enhance heater as high as possible.
5.
Fill radiator and reservoir tank with water and reinstall radiator cap.
• When engine coolant over flows disconnected heater hose, connect heater hose, and continue filling the
engine coolant.
6.
Connect vacuum hose, and install vacuum tube.
7.
Install air duct (suction side), air cleaner cover assembly and air cleaner body assembly. Refer to
8.
Run the engine and warm it up to normal operating temperature.
9.
Rev the engine two or three times under no-load.
10. Stop the engine and wait until it cools down.
11. Drain water from the system. Refer to
.
12. Repeat steps 1 through 9 until clear water begins to drain from radiator.
: Vehicle front
JPBIA4453ZZ
Revision: 2013 October
2014 JUKE
CO-12
< PERIODIC MAINTENANCE >
[MR16DDT ]
RADIATOR
RADIATOR
RADIATOR CAP
RADIATOR CAP : Inspection
INFOID:0000000009749829
• Check valve seat (A) of radiator cap.
- Check that valve seat is swollen to the extent that the edge of the
plunger cannot be seen when watching it vertically from the top.
- Check that valve seat has no soil and damage.
• Pull negative-pressure valve to open it, and that it close completely
when released.
- Check that there is no dirt or damage on the valve seat of radiator
cap negative-pressure valve.
- Check that there are no unusualness in the opening and closing
conditions of negative-pressure valve.
• Check radiator cap relief pressure.
- When connecting radiator cap to the radiator cap tester (commer-
cial service tool) (A) and the radiator cap tester adapter (commer-
cial service tool) (B), apply engine coolant to the cap seal surface.
• Replace radiator cap if there is an unusualness related to the above three.
CAUTION:
When installing radiator cap, thoroughly wipe out the radiator filler neck to remove any waxy residue
or foreign material.
RADIATOR
RADIATOR : Inspection
INFOID:0000000009749830
Check radiator for mud or clogging. If necessary, clean radiator as follows.
CAUTION:
• Be careful not to bend or damage radiator fins.
• When radiator is cleaned without removal, remove all surrounding parts such as radiator cooling fan
assembly and horns. Then tape harness and harness connectors to prevent water from entering.
1.
Apply water by hose to the back side of the radiator core vertically downward.
2.
Apply water again to all radiator core surfaces once per minute.
3.
Stop washing if any stains no longer flow out from radiator.
B : Metal plunger
JPBIA0108ZZ
SMA967B
Standard and Limit
: Refer to
PBIC5122J
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RADIATOR
CO-13
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4.
Blow air into the back side of radiator core vertically downward.
• Use compressed air lower than 490 kPa (4.9 bar, 5 kg/cm
2
, 71 psi) and keep distance more than 30 cm
(11.81 in).
5.
Blow air again into all the radiator core surfaces once per minute until no water sprays out.
Revision: 2013 October
2014 JUKE
CO-14
< REMOVAL AND INSTALLATION >
[MR16DDT ]
RADIATOR
REMOVAL AND INSTALLATION
RADIATOR
Exploded View
INFOID:0000000009749831
Removal and Installation
INFOID:0000000009749832
REMOVAL
WARNING:
• Never remove radiator cap when engine is hot. Serious burns may occur from high-pressure engine
coolant escaping from engine cooling system.
• 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.
NOTE:
1.
Cooling fan assembly
2.
Mounting rubber (upper)
3.
Radiator
4.
Mounting rubber (lower)
5.
O-ring
6.
Drain plug
7.
Clamp
8.
Radiator hose (lower) (LH)
9.
Reservoir tank hose
10. Reservoir tank
11.
Reservoir tank cap
12. Clamp
13. Radiator hose (upper)
14. Water outlet adaptor
15. Radiator cap
16. Radiator hose pipe
17. Bracket
18. Radiator hose (lower) (RH)
A.
To water outlet
B.
To water inlet
: N·m (kg-m, in-lb)
: Always replace after every disassembly.
: Indicates that the parts is connected at points with symbols in actual vehicle.
JPBIA4336GB
Revision: 2013 October
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RADIATOR
CO-15
< REMOVAL AND INSTALLATION >
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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
.
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belt.
2.
Remove engine cover. Refer to
.
3.
Remove engine under cover.
4.
Remove radiator hose (upper and lower).
5.
Remove front bumper. Refer to
6.
Remove radiator core support upper. Refer to
DLK-134, "Removal and Installation"
DLK-257, "Removal and Installation"
(Without Intelligent Key).
7.
Disconnect cooling fan harness connector.
8.
Remove reservoir tank.
9.
Remove cooling fan assembly.
CAUTION:
Never damage or scratch the radiator core.
10. Remove condenser from radiator and temporarily fasten it on vehicle with a rope.
11. Pull up and remove the radiator assembly (1).
CAUTION:
Never damage radiator core and condenser assembly core.
INSTALLATION
CAUTION:
Do not reuse O-rings.
Note the following, and install in the reverse order of removal.
NOTE:
• Insert the radiator hose (1) all the way to the stopper (2) or by 33 mm (1.30 in) (hose without a stopper).
• For the orientation of the hose clamp pawl, refer to the figure.
JPBIA4455ZZ
Unit mm (in)
A.
Radiator side
B.
Engine side
JPBIA4294GB
Radiator hose
Hose end
Paint mark
Position of hose clamp*
Radiator hose (upper)
Radiator side
Upper
A
Engine side
Upper
B
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CO-16
< REMOVAL AND INSTALLATION >
[MR16DDT ]
RADIATOR
*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
±
15
°
as shown in the figure.
• To install hose clamps (1), check that the dimension (A) from the
end of the paint mark (2) on the radiator hose to the hose clamp is
within the reference value.
Inspection
INFOID:0000000009749833
INSPECTION AFTER INSTALLATION
Radiator hose (lower) (RH)
Radiator side
Upper
C
Engine side
Front side
D
Radiator hose (lower) (LH)
Radiator side
Rear side
E
Engine side
Rear side
F
Radiator hose
Hose end
Paint mark
Position of hose clamp*
G.
View G
h.
45
°
: Vehicle upper
JPBIA4375ZZ
JPBIA4295ZZ
Dimension “A”
3 mm (0.12 in)
JPBIA4374ZZ
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RADIATOR
CO-17
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• 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
.
• Start and warm up the engine. Check visually that there is no leakage of engine coolant.
Revision: 2013 October
2014 JUKE
CO-18
< REMOVAL AND INSTALLATION >
[MR16DDT ]
COOLING FAN
COOLING FAN
Exploded View
INFOID:0000000009749834
Removal and Installation
INFOID:0000000009749835
REMOVAL
1.
Drain engine coolant. Refer to
CAUTION:
• Perform this step engine is cold.
• Never spill engine coolant on drive belt.
2.
Remove engine cover.
3.
Remove front bumper. Refer to
4.
Remove radiator core support upper. Refer to
DLK-134, "Removal and Installation"
(With Intelligent Key)
DLK-257, "Removal and Installation"
5.
Disconnect cooling fan harness connector.
6.
Remove reservoir tank. Refer to
.
7.
Remove radiator hose (upper). Refer to
.
8.
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:
Cooling fan is controlled by ECM. For details, Refer to
EC-531, "Component Function Check"
.
1.
Fan motor
2.
Fan shroud
3.
Cooling fan
A.
Apply on fan motor shaft
: N·m (kg-m, in-lb)
: Apply genuine high strength thread locking sealant or equivalent.
JPBIA4337GB
Revision: 2013 October
2014 JUKE
COOLING FAN
CO-19
< REMOVAL AND INSTALLATION >
[MR16DDT ]
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Disassembly and Assembly
INFOID:0000000009749836
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:0000000009749837
INSPECTION AFTER DISASSEMBLY
Cooling Fan
Inspect cooling fan for crack or unusual bend.
• If anything is found, replace cooling fan.
Revision: 2013 October
2014 JUKE
CO-20
< REMOVAL AND INSTALLATION >
[MR16DDT ]
WATER PUMP
WATER PUMP
Exploded View
INFOID:0000000009749838
Removal and Installation
INFOID:0000000009749839
REMOVAL
1.
Drain engine coolant from radiator. Refer to
.
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belt.
2.
Steer front wheel to the right.
3.
Remove front fender protector (RH). Refer to
4.
Remove drive belt. Refer to
.
5.
Remove water pump.
• Engine coolant will leak 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:0000000009749840
INSPECTION AFTER REMOVAL
1.
Gasket
2.
Water pump
: N·m (kg-m, ft-lb)
: Always replace after every disassembly.
JPBIA4338GB
Revision: 2013 October
2014 JUKE
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