Nissan Murano Z51 (2012 year). Manual — part 20
DESCRIPTION
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< SYSTEM DESCRIPTION >
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SYSTEM DESCRIPTION
DESCRIPTION
Engine Cooling System
INFOID:0000000007542443
Engine Cooling System Schematic
INFOID:0000000007542444
JPBIA1682GB
JPBIA1683GB
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< SYMPTOM DIAGNOSIS >
OVERHEATING CAUSE ANALYSIS
SYMPTOM DIAGNOSIS
OVERHEATING CAUSE ANALYSIS
Troubleshooting Chart
INFOID:0000000007542445
Symptom
Check items
Cooling sys-
tem parts
malfunction
Poor heat transfer
Water pump malfunction
Worn or loose drive belt
—
Thermostat 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 density
—
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
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< 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
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
Blocked air flow
Installed large fog lamp
Symptom
Check items
Revision: 2013 February
2012 MURANO
CO-6
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
FOR USA AND CANADA
FOR USA AND CANADA : Precaution for Supplemental Restraint System (SRS) "AIR
BAG" and "SEAT BELT PRE-TENSIONER"
INFOID:0000000007542446
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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision that 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 “SRS AIR BAG”.
• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, never 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.
FOR USA AND CANADA : Liquid Gasket
INFOID:0000000007542447
REMOVAL OF LIQUID GASKET SEALING
• After removing mounting nuts and bolts, separate the mating sur-
face using the seal cutter [SST: KV10111100 (J-37228)] (A) and
remove old liquid gasket sealing.
CAUTION:
Be careful not to damage the mating surfaces.
• Tap (B) the seal cutter [SST: KV10111100 (J-37228)] to insert it,
and then slide (C) it by tapping on the side as shown in the figure.
• In areas where seal cutter [SST: KV10111100 (J-37228)] is difficult
to use, use a plastic hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as a screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
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PRECAUTIONS
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< PRECAUTION >
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1.
Using a scraper (A), remove old liquid gasket adhering to the liq-
uid gasket application surface and the mating surface.
• Remove liquid gasket completely from the groove of the liquid
gasket application surface, mounting bolts, and bolt holes.
2.
Wipe the liquid gasket application surface and the mating sur-
face with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.
3.
Attach liquid gasket tube to the tube presser (commercial ser-
vice tool).
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-22, "Recommended Chemical Products and Sealants"
.
4.
Apply liquid gasket without breaks to the specified location with
the specified dimensions.
• If there is a groove for the liquid gasket application, apply liq-
uid gasket to the groove.
• As for the bolt holes (B), normally apply liquid gasket inside
the holes. Occasionally, it should be applied outside the holes.
Check to read the text of service manual.
• Within five minutes of liquid gasket application, install the mat-
ing component.
• If liquid gasket protrudes, wipe it off immediately.
• Never retighten after mounting bolts and nuts the installation.
• After 30 minutes or more have passed from the installation, fill
engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them.
FOR MEXICO
FOR MEXICO : Precaution for Supplemental Restraint System (SRS) "AIR BAG" and
"SEAT BELT PRE-TENSIONER"
INFOID:0000000007542448
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. Information necessary to service the system safely is included in the “SRS AIR BAG” and
“SEAT BELT” of this Service Manual.
WARNING:
Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision that 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 “SRS AIR BAG”.
• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
JPBIA0053ZZ
EMA0622D
A
: Groove
: Inside
JPBIA0010ZZ
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CO-8
< PRECAUTION >
PRECAUTIONS
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, never 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.
FOR MEXICO : Liquid Gasket
INFOID:0000000007542449
REMOVAL OF LIQUID GASKET SEALING
• After removing mounting nuts and bolts, separate the mating sur-
face using the seal cutter [SST: KV10111100 (J-37228)] (A) and
remove old liquid gasket sealing.
CAUTION:
Be careful not to damage the mating surfaces.
• Tap (B) the seal cutter [SST: KV10111100 (J-37228)] to insert it,
and then slide (C) it by tapping on the side as shown in the figure.
• In areas where seal cutter [SST: KV10111100 (J-37228)] is difficult
to use, use a plastic hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as a screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1.
Using a scraper (A), remove old liquid gasket adhering to the liq-
uid gasket application surface and the mating surface.
• Remove liquid gasket completely from the groove of the liquid
gasket application surface, mounting bolts, and bolt holes.
2.
Wipe the liquid gasket application surface and the mating sur-
face with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.
3.
Attach liquid gasket tube to the tube presser (commercial ser-
vice tool).
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-22, "Recommended Chemical Products and Sealants"
.
4.
Apply liquid gasket without breaks to the specified location with
the specified dimensions.
• If there is a groove for the liquid gasket application, apply liq-
uid gasket to the groove.
JPBIA0052ZZ
JPBIA0053ZZ
EMA0622D
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PRECAUTIONS
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• As for the bolt holes (B), normally apply liquid gasket inside
the holes. Occasionally, it should be applied outside the holes.
Check to read the text of service manual.
• Within five minutes of liquid gasket application, install the mat-
ing component.
• If liquid gasket protrudes, wipe it off immediately.
• Never retighten after mounting bolts and nuts the installation.
• After 30 minutes or more have passed from the installation, fill
engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them.
A
: Groove
: Inside
JPBIA0010ZZ
Revision: 2013 February
2012 MURANO
CO-10
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service Tool
INFOID:0000000007542450
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service Tools
INFOID:0000000007542451
Tool number
(Kent-Moore No.)
Tool name
Description
KV10111100
(J-37228)
Seal cutter
Removing water pump cover
NT046
Tool name
Description
Tube presser
Pressing the tube of liquid gasket
Power tool
Loosening nuts and bolts
Radiator cap tester
Checking radiator and radiator cap
Radiator cap tester adapter
Adapting radiator cap tester to radiator cap
and radiator pipe (upper) filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
S-NT052
PBIC0190E
PBIC1982E
S-NT564
Revision: 2013 February
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ENGINE COOLANT
CO-11
< PERIODIC MAINTENANCE >
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PERIODIC MAINTENANCE
ENGINE COOLANT
Inspection
INFOID:0000000007542452
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 if necessary.
CAUTION:
Refill Genuine NISSAN Long Life Antifreeze/Coolant (blue) or
equivalent in its quality mixed with water (distilled or demineral-
ized). Refer to
MA-16, "FOR NORTH AMERICA : Fluids and
(FOR MEXICO).
LEAKAGE
• To check for leakage, apply pressure to the cooling system with the
radiator cap tester (commercial service tool) (A) and radiator cap
tester adapter (commercial service tool) (B).
WARNING:
Never remove radiator cap when engine is hot. Serious burns
could occur from high-pressure engine coolant escaping from
radiator.
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:0000000007542453
WARNING:
• To avoid being scalded, never change engine coolant when the engine is hot.
• Wrap a thick cloth around radiator cap and carefully remove radiator cap. First, turn radiator cap a
quarter of a turn to release built-up pressure. Then turn radiator cap all the way.
1.
Remove engine under cover.
2.
Open radiator drain plug (1) at the bottom of radiator, and then
remove radiator cap.
When draining all of engine coolant in the system, open water drain plugs on cylinder block. Refer
to
.
A
: MAX
B
: MIN
JPBIA0102ZZ
Testing pressure
: Refer to
.
PBIC5121J
: Vehicle front
JPBIA1684ZZ
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CO-12
< PERIODIC MAINTENANCE >
ENGINE COOLANT
3.
Remove reservoir tank if necessary, and drain engine coolant and clean reservoir tank before installing.
4.
Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
If contaminated, flush the engine cooling system. Refer to
.
Refilling
INFOID:0000000007542454
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-16, "FOR NORTH AMERICA : Fluids and
(for North America) or Refer to
MA-17, "FOR MEXICO : Fluids and Lubricants"
(for Mex-
ico).
1.
Install reservoir tank if removed and 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 assembly and air cleaner cases (upper and lower) assembly. Refer to
.
4.
Disconnect heater hose (1) at the position (
) in the figure.
5.
Fill radiator, and reservoir tank if removed, to specified level.
CAUTION:
Never adhere the engine coolant to electronic equipments.
(alternator etc.)
• Pour engine coolant through engine coolant filler neck
slowly of less than 2 (2-1/8 US qt, 1-3/4 lmp 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.
Tightening torque
: Refer to
: Vehicle front
JPBIA1685ZZ
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Engine coolant capacity
: Refer to
CO-32, "Periodical Maintenance Spec-
(With reservoir tank at “MAX” level)
Reservoir tank engine coolant capacity
: Refer to
CO-32, "Periodical Maintenance
(At “MAX” level)
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ENGINE COOLANT
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6.
Install air duct assembly and air cleaner cases (upper and lower) assembly. Refer to
.
7.
Install radiator cap.
8.
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.
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 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.
14. Repeat step 13 three times.
15. If sound is heard, bleed air from cooling system by repeating step 5, and steps from 7 to 14 until engine
coolant level no longer drops.
Flushing
INFOID:0000000007542455
1.
Install reservoir tank if removed and 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 assembly and air cleaner cases (upper and lower) assembly. Refer to
.
A
: MAX
B
: MIN
JPBIA0102ZZ
Tightening torque
Revision: 2013 February
2012 MURANO
CO-14
< PERIODIC MAINTENANCE >
ENGINE COOLANT
3.
Disconnect heater hose (1) at the position (
) in the figure.
4.
Fill radiator and reservoir tank with water and reinstall radiator cap.
CAUTION:
Never adhere the water to electronic equipments. (alternator etc.)
• When water overflows disconnected heater hose, connect heater hose, and continue filling the
water.
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
9.
Repeat steps 1 through 8 until clear water begins to drain from radiator.
: Vehicle front
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RADIATOR
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< PERIODIC MAINTENANCE >
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RADIATOR
RADIATOR CAP
RADIATOR CAP : Inspection
INFOID:0000000007542456
• Check valve seat (A) of radiator cap.
- Check if valve seat is swollen to the extent that the edge of the
plunger (B) cannot be seen when watching it vertically from the
top.
- Check if valve seat has no soil and damage.
- 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) and the radiator cap tester adapter (commercial
service tool) (A), 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 pipe (upper) filler neck to remove any
waxy residue or foreign material.
RADIATOR
RADIATOR : Inspection
INFOID:0000000007542457
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 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.
4.
Blow air into the back side of radiator core vertically downward.
• Use compressed air lower than 490 kPa (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.
JPBIA1961ZZ
Standard and limit
: Refer to
.
JPBIA0109ZZ
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2012 MURANO
CO-16
< REMOVAL AND INSTALLATION >
RADIATOR
REMOVAL AND INSTALLATION
RADIATOR
Exploded View
INFOID:0000000007542458
1.
Reservoir tank cap
2.
Reservoir tank
3.
Clamp
4.
Reservoir tank hose
5.
Radiator cap
6.
Radiator cap adapter
7.
Radiator pipe (upper)
8.
Clamp
9.
Radiator hose (upper)
10. Radiator hose (upper)
11.
O-ring
12. Drain plug
13. Water drain hose
14. Mounting rubber (upper)
15. Radiator upper clip
16. Radiator
17. Mounting rubber (lower)
18. Radiator pipe (lower)
19. Radiator hose (lower)
20. Clamp
21. CVT fluid cooler hose
22. CVT fluid cooler hose
23. CVT fluid cooler pipe
24. CVT fluid cooler hose
25. Grommet
26. Cooling fan assembly
27. Radiator hose (lower)
A.
To water outlet
B.
To transaxle assembly
C.
To water inlet
: Always replace after every disassembly.
: N·m (kg-m, in-lb)
JPBIA2760GB
Revision: 2013 February
2012 MURANO
RADIATOR
CO-17
< REMOVAL AND INSTALLATION >
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Removal and Installation
INFOID:0000000007542459
REMOVAL
WARNING:
Never remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine
coolant escaping from 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.
1.
Remove the following parts:
• Engine under cover.
• Radiator core support covers (RH and LH): Refer to
.
• Air duct (inlet): Refer to
.
• Front grille: Refer to
• Horn: Refer to
.
• Hood lock: Refer to
2.
Drain engine coolant from radiator. Refer to
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belt.
3.
Disconnect reservoir tank hose from radiator pipe (upper).
4.
Disconnect CVT fluid cooler hoses from radiator.
• Install blind plug to avoid leakage of CVT fluid.
5.
Remove radiator cap adapter and each radiator hoses (upper) and radiator pipe (upper) assembly.
CAUTION:
Be careful not to allow engine coolant to contact drive belt.
6.
Disconnect radiator hose (lower) from radiator.
7.
Remove condenser. Refer to
.
CAUTION:
Be careful not to damage condenser core.
8.
Remove each radiator upper clips (2) by pulling the tabs (A) out-
side to release the lock (B) and then remove each mounting rub-
bers (upper) (1).
CAUTION:
Never pull the tabs outside excessively to prevent it from
damping.
9.
Lift up and remove radiator (1) from front of radiator core support
(2).
CAUTION:
Be careful not to damage or scratch on radiator core.
INSTALLATION
CAUTION:
Do not reuse O-rings.
Note the following, and install in the reverse order of removal.
Radiator Upper Clip
C
: Mounting pin
: Vehicle front
JPBIA1689ZZ
: Vehicle front
JPBIA1699ZZ
Revision: 2013 February
2012 MURANO
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