water pump NISSAN LATIO 2010 Service Repair Manual

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ENGINE
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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 Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
3
Precaution for Liquid Gasket .....................................4
PREPARATION ............................................6
PREPARATION .............................................. .....6
Special Service Tool ........................................... ......6
Commercial Service Tool ..........................................6
SYMPTOM DIAGNOSIS ...............................8
OVERHEATING CAUSE ANALYSIS ............. .....8
Troubleshooting Chart ...............................................8
FUNCTION DIAGNOSIS .. ............................10
DESCRIPTION ............................................... ....10
Engine Cooling System ....................................... ....10
Engine Cooling System Schematic .........................11
ON-VEHICLE MAINTENANCE ....................12
ENGINE COOLANT ....................................... ....12
Inspection ............................................................ ....12
Changing Engine Coolant .......................................12
RADIATOR .........................................................15
Checking Radiator Cap ....................................... ....15
Checking Radiator ...................................................15
ON-VEHICLE REPAIR .................................17
RADIATOR ..................................................... ....17
Component .......................................................... ....17
Removal and Installation ..................................... ....17
COOLING FAN ..................................................19
Component (Models with A/C) .................................19
Component (Models without A/C) ............................19
Removal and Installation .........................................20
Disassembly and Assembly .....................................20
WATER PUMP ..................................................21
Exploded View .........................................................21
Removal and Installation .........................................21
Inspection ................................................................22
THERMOSTAT ..................................................23
Exploded View .........................................................23
Removal and Installation .........................................23
Inspection ................................................................24
WATER OUTLET ..............................................25
Exploded View .........................................................25
Removal and Installation .........................................25
Inspection ................................................................26
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
27
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
27
Periodical Maintenance Specification .................. ....27
Radiator ...................................................................27
Thermostat ..............................................................27
MR18DE
SERVICE INFORMATION .. .........................
28
PRECAUTIONS .................................................28
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
28
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ...................................
28
Precaution for Liquid Gasket ...................................29
Revision: January 20102010 Versa

CO-2
PREPARATION .............................................. ...31
Special Service Tool ............................................ ...31
Commercial Service Tool .......................................31
OVERHEATING CAUSE ANALYSIS ................33
Troubleshooting Chart ......................................... ...33
COOLING SYSTEM ...........................................35
Cooling Circuit ..................................................... ...35
ENGINE COOLANT ...........................................36
Inspection ............................................................ ...36
Changing Engine Coolant .......................................36
RADIATOR ........................................................39
Checking Radiator Cap ....................................... ...39
Checking Radiator ..................................................39
Component .............................................................40
Removal and Installation ........................................41
COOLING FAN ..................................................42
Component (Models with A/C) ................................42
Component (Models without A/C) ........................ ...42
Removal and Installation .........................................43
Disassembly and Assembly ................................. ...43
WATER PUMP ...................................................44
Component .......................................................... ...44
Removal and Installation .........................................44
THERMOSTAT ............................................... ...46
Component .......................................................... ...46
Removal and Installation .........................................46
WATER OUTLET AND WATER CONTROL
VALVE ............................................................ ...
48
Component .......................................................... ...48
Removal and Installation .........................................48
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
51
Standard and Limit ............................................... ...51
Revision: January 20102010 Versa

CO-6
< PREPARATION >[HR16DE]
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000005398178
The actual shapes of Kent-Moore tools may from
those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000005398179
Tool number
(Kent-Moore No.)
Tool name Description
WS39930000
(—)
Tube pressure Pressing the tube of liquid gasket
KV991J0070
(J-45695)
Coolant Refill Tool Refilling engine cooling system
EG17650301
(J-33984-A)
Radiator cap tester adapter Adapting radiator cap tester to radiator cap
and radiator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
K V 1 0 1111 0 0
(J-37228)
Seal cutter Removing chain tensioner cover and water
pump cover
—
(J-23688)
Engine coolant refractometer Checking concentration of ethylene glycol in
engine coolant
S-NT052
LMA053
S-NT564
NT046
WBIA0539E
Revision: January 20102010 Versa

CO-8
< SYMPTOM DIAGNOSIS >[HR16DE]
OVERHEATING CAUSE ANALYSIS
SYMPTOM DIAGNOSIS
OVERHEATING CAUSE ANALYSIS
Troubleshooting ChartINFOID:0000000005398180
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 leaksCooling hose
Loose clamp
Cracked hose
Water pump Poor sealing
Reservoir tank cap Loose
Poor sealing
Radiator O-ring for da
mage, 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 system Cylinder head deterioration
Cylinder head gasket deteri-
oration
Revision: January 20102010 Versa

CO-10
< FUNCTION DIAGNOSIS >[HR16DE]
DESCRIPTION
FUNCTION DIAGNOSIS
DESCRIPTION
Engine Cooling SystemINFOID:0000000005398181
AWBIA0155ZZ
1. Cylinder head
2. Cylinder block3. Water pump
4. Thermostat 5. Water inlet6. Water bypass
7. Water outlet A. From radiatorB. To radiator
C. From electric throttle control actuator D. From heater E. To heater
F. To electric throttle control actuator Thermostat openThermostat closed
Revision: January 20102010 Versa

DESCRIPTIONCO-11
< FUNCTION DIAGNOSIS > [HR16DE]
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Engine Cooling System SchematicINFOID:0000000005398182
AWBIA0784ZZ
1. Reservoir tank
2. Radiator3. Water inlet
4. Thermostat 5. Water bypass6. Water jacket
7. Water pump 8. Cylinder block9. Cylinder head
10. Water outlet 11. Electric throttle control actuator 12. Heater
A. Thermostat open B. Thermostat closedC. Constant
Revision: January 20102010 Versa

WATER PUMPCO-21
< ON-VEHICLE REPAIR > [HR16DE]
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WATER PUMP
Exploded ViewINFOID:0000000005398192
Removal and InstallationINFOID:0000000005398193
REMOVAL
1. Drain engine coolant from radiator. Refer to
CO-12, "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-24, "
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-15, "
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: January 20102010 Versa

CO-22
< ON-VEHICLE REPAIR >[HR16DE]
WATER PUMP
• Tighten bolts in numerical order as shown.
Water pump pulley.
CAUTION:
Never install mounting bolts
(A) to oblong holes (B).
• Water pump pulley (1)
InspectionINFOID:0000000005398194
INSPECTION AFTER REMOVAL
• Visually check if there is no significant dirt or rusting on water
pump body and vane (A).
• Make sure that there is no looseness in vane shaft, and that it turns smoothly when rotated by hand.
• Replace water pump, if necessary.
INSPECTION AFTER INSTALLATION
• Check that the reservoir tank cap is tightened.
• Check for leaks of engine coolant. Refer to CO-12, "
Inspection".
• Start and warm up the engine. Visually check for leaks of engine coolant.
KBIA3393J
PBIC3809E
PBIC3808E
Revision: January 20102010 Versa

PREPARATIONCO-31
< SERVICE INFORMATION > [MR18DE]
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PREPARATION
Special Service ToolINFOID:0000000005398208
The actual shapes of Kent-Moore tools may from
those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000005398209
Tool number
(Kent-Moore No.)
Tool name Description
WS39930000
(—)
Tube pressure Pressing the tube of liquid gasket
KV991J0070
(J-45695)
Coolant Refill Tool Refilling engine cooling system
EG17650301
(J-33984-A)
Radiator cap tester adapter Adapting radiator cap tester to radiator cap
and radiator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
K V 1 0 1111 0 0
(J-37228)
Seal cutter Removing chain tensioner cover and water
pump cover
—
(J-23688)
Engine coolant refractometer Checking concentration of ethylene glycol in
engine coolant
S-NT052
LMA053
S-NT564
NT046
WBIA0539E
Revision: January 20102010 Versa

OVERHEATING CAUSE ANALYSISCO-33
< SERVICE INFORMATION > [MR18DE]
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OVERHEATING CAUSE ANALYSIS
Troubleshooting ChartINFOID:0000000005398210
Symptom
Check items
Cooling sys-
tem parts
malfunction Poor heat transfer
Water pump malfunction Worn or loose drive belt
—
Thermostat stuck closed Thermostat
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 —
Engine coolant viscosity —
Poor engine coolant quality — —
Insufficient engine coolant Engine coolant leaks 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 leaks into cool-
ing systemCylinder head deterioration
Cylinder head gasket deteri-
oration
Revision: January 20102010 Versa