2011 NISSAN LATIO belt

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ENGINE
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SECTION CO
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CONTENTS
ENGINE COOLING SYSTEM
HR16DE
PRECAUTION ....... ........................................
3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution for Liquid Gasket .....................................3
PREPARATION ............................................5
PREPARATION .............................................. .....5
Special Service Tool ........................................... ......5
Commercial Service Tool ..........................................5
SYMPTOM DIAGNOSIS ...............................7
OVERHEATING CAUSE ANALYSIS ............. .....7
Troubleshooting Chart ...............................................7
FUNCTION DIAGNOSIS .. .............................9
DESCRIPTION ............................................... .....9
Engine Cooling System ....................................... ......9
Engine Cooling System Schematic .........................10
ON-VEHICLE MAINTENANCE ....................11
ENGINE COOLANT ....................................... ....11
Inspection ............................................................ ....11
Changing Engine Coolant .......................................11
RADIATOR .........................................................14
Checking Radiator Cap ....................................... ....14
Checking Radiator ...................................................14
ON-VEHICLE REPAIR .................................16
RADIATOR ..................................................... ....16
Component .......................................................... ....16
Removal and Installation .........................................16
COOLING FAN ..................................................18
Component (Models with A/C) ............................. ....18
Component (Models without A/C) ............................18
Removal and Installation .........................................19
Disassembly and Assembly .....................................19
WATER PUMP ..................................................20
Exploded View .........................................................20
Removal and Installation .........................................20
Inspection ................................................................21
THERMOSTAT ..................................................22
Exploded View .........................................................22
Removal and Installation .........................................22
Inspection ................................................................23
WATER OUTLET ..............................................24
Exploded View .........................................................24
Removal and Installation .........................................24
Inspection ................................................................25
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
26
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
26
Periodical Maintenance Specification .................. ....26
Radiator ...................................................................26
Thermostat ..............................................................26
MR18DE
SERVICE INFORMATION .. .........................
27
PRECAUTIONS .................................................27
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
27
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ...................................
27
Precaution for Liquid Gasket ...................................28
PREPARATION .................................................30
Revision: May 2010 2011 Versa

PRECAUTIONSCO-3
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental
Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005930769
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 severi ty 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric 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.
Precaution for Liquid GasketINFOID:0000000005930771
REMOVAL OF LIQUID GASKET SEALING
• After removing nuts and bolts, separate the mating surface, using Tool and remove old liquid gasket sealing.
CAUTION:
Be careful not to damage the mating surfaces.
• Tap Tool to insert it (1), and then slide it by tapping on the side (2)
as shown.
• In areas where Tool is difficult to use, use plastic hammer to lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason suitable tool such as screw-
driver is used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
Tool number : KV10111100 (J-37228)
WBIA0566E
Revision: May 2010 2011 Versa

OVERHEATING CAUSE ANALYSISCO-7
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SYMPTOM DIAGNOSIS
OVERHEATING CAUSE ANALYSIS
Troubleshooting ChartINFOID:0000000005930774
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 —Radiator shroud —
Improper engine coolant
mixture ratio —
Engine coolant viscosity —
Poor engine coolant quality — —
Insufficient engine coolant Engine coolant leaks 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 leaks into cool-
ing systemCylinder head deterioration
Cylinder head gasket deteri-
oration
Revision: May 2010
2011 Versa

ENGINE COOLANTCO-11
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ON-VEHICLE MAINTENANCE
ENGINE COOLANT
InspectionINFOID:0000000005930777
LEVEL CHECK
• Check if the reservoir tank engine coolant level is within the “MIN”
to “MAX” range when engine is cool.
• Adjust the engine coolant level as necessary.
CHECKING COOLING SYSTEM FOR LEAKS
To check for leaks, apply pressure to the cooling system using suit-
able tool and Tool.
WARNING:
Never remove the radiator cap wh en the engine is hot. Serious
burns could occur from high pressure coolant escaping from
the radiator.
CAUTION:
Higher pressure than specified may cause radiator damage.
Changing Engine CoolantINFOID:0000000005930778
WARNING:
• To avoid being scalded, do not change engine coolant when engine is hot.
• Wrap a thick cloth around radiator cap and carefully remove the cap. First, turn the cap a quarter of a
turn to release built-up pressure. Then turn the cap all the way.
CAUTION:
• Do not spill engine coolant on drive belt.
DRAINING ENGINE COOLANT
1. Open radiator drain plug (1) at the bottom of radiator, and then remove radiator cap.
• Front
When draining all of engine coolant in the system, open
water drain plug on cylinder block. Refer to EM-90
.
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belt.
2. Remove reservoir tank as necessary, and drain engi ne coolant and clean reservoir tank before installing.
Refer to CO-16, "
Component".
3. Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
SMA412B
Tool number : EG17650301 (J-33984-A)
Testing pressure : 157 kPa (1.6 kg/cm
2, 23 psi)
WBIA0568E
PBIC3799E
Revision: May 2010 2011 Versa

RADIATORCO-17
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Do not remove radiator cap when the engine is
hot. Serious burns could occur from high-pressure
engine coolant escaping from radiator. Wrap a thick cl oth 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.
REMOVAL
1. Remove engine under cover. Refer to EI-15, "Removal and Installation".
2. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant".
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belt.
3. Remove air duct (inlet). Refer to EM-25, "
Exploded View".
4. Remove reservoir tank as follows:
a. Disconnect reservoir tank hose.
b. Release the tab (A) in the direction shown by the arrow ( ).
c. Lift up while removing the reservoir tank hose, and remove it.
5. Disconnect harness connector from fan motor, and move harness aside.
6. Disconnect A/T fluid cooler hoses if equipped. • Install plug to avoid leakage of A/T fluid if equipped.
7. Remove radiator hoses (upper and lower).
8. Remove radiator core support cover.
9. Remove cooling fan assembly.
10. Remove radiator core support (upper) bolts, bolts of stationary part on the radiator core support side and clip. Lift radiator
assembly (1) from radiator (upper) mount part of radiator core
support (upper) (2).
11. Move radiator assembly (1) to the rearward direction of vehicle, and then lift it upward to remove.
CAUTION:
Do not damage or scratch A/C condenser if equipped and
radiator core when removing.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Do not damage or scratch A/C condenser if equipped and radiator core when removing.
INSPECTION AFTER INSTALLATION
• Check for leaks of engine coolant. Refer to CO-11, "Inspection".
• Start and warm up engine. Visually check if there is no leaks of engine coolant and A/T fluid if equipped.
Refer to CO-11, "
Inspection" and AT-17, "Checking A/T Fluid".
PBIC3800E
PBIC3805E
Revision: May 2010 2011 Versa

COOLING FANCO-19
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Removal and InstallationINFOID:0000000005930785
REMOVAL
1. Partially drain engine coolant from radiator. Refer to
CO-11, "Changing Engine Coolant".
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belt.
2. Remove air duct (inlet). Refer to EM-25, "
Exploded View".
3. Remove reservoir tank.
4. Disconnect radiator hose (upper) at radiator side. Refer to CO-16, "
Component".
5. Disconnect harness connectors from fan motor, and move harness to aside.
6. Remove cooling fan assembly. CAUTION:
Be careful not to damage or scratch the radiator core.
INSTALLATION
Installation is in the reverse order of removal.
• Cooling fans are controlled by ECM. For details, refer to EC-425, "
Description".
CAUTION:
Be careful not to damage or scratch the radiator core.
Disassembly and AssemblyINFOID:0000000005930786
DISASSEMBLY
1. Remove cooling fan from fan motor.
2. Remove fan motor from fan shroud.
INSPECTION AFTER DISASSEMBLY
Inspect cooling fan for crack or unusual bend.
• If anything is found, replace cooling fan.
ASSEMBLY
Assembly is in the reverse order of disassembly.
Revision: May 2010 2011 Versa

CO-20
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WATER PUMP
WATER PUMP
Exploded ViewINFOID:0000000005930787
Removal and InstallationINFOID:0000000005930788
REMOVAL
1. Drain engine coolant from radiator. Refer to
CO-11, "Changing Engine Coolant".
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belts.
2. Partially remove front fender protector (RH). Refer to EI-26, "
Removal and Installation".
3. Loosen mounting bolts of water pump pulley before loosening belt tension of drive belt.
4. Remove drive belt. Refer to EM-14, "
Removal and Installation".
5. Remove water pump pulley.
6. Remove water pump. • Loosen mounting bolts in reverse order as shown.
• Engine coolant will leak from cylinder block, so have a recep-tacle 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
Installation is in the reverse order of removal.
Water pump.
1. Gasket 2. Water pump3. Water pump pulley
PBIC3807E
KBIA3393J
Revision: May 2010 2011 Versa

CO-22
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THERMOSTAT
THERMOSTAT
Exploded ViewINFOID:0000000005930790
Removal and InstallationINFOID:0000000005930791
REMOVAL
1. Drain engine coolant from radiator. Refer to
CO-11, "Changing Engine Coolant".
CAUTION:
• Perform this step when engine is cold.
• Never spill engine coolant on drive belt.
2. Remove air duct (inlet). Refer to EM-25, "
Exploded View".
3. Remove reservoir tank. Refer to CO-16, "
Component".
4. Add paint mark, then disconnect radiator hose (lower) from water inlet. Refer to CO-16, "
Component".
5. Remove water inlet and thermostat. • Engine coolant will leak from cylinder block, so have a receptacle ready below.
INSTALLATION
Installation is in the reverse order of removal.
Thermostat
• Install thermostat making sure rubber ring (1) groove fits securelyto thermostat flange (A).
1. Radiator hose (lower) 2. Water inlet3. Rubber ring
4. Thermostat
A. To radiator
PBIC3810E
PBIC3811E
Revision: May 2010 2011 Versa