2009 NISSAN LATIO Water pump

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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 fo r Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
3
Precaution for Liquid Gasket ............................... ......4
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 MAINTENA NCE ....................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
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
DISASSEMBLY AND AS SEMBLY ..............26
COOLING FAN .................................................. 26
Disassembly and Assembly ................................. ....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

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PREPARATION
PREPARATION
Special Service Tool INFOID:0000000004784395
The actual shapes of Kent-Moore tools may from those of special service tools illustrated here.
Commercial Service Tool INFOID:0000000004784396
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)
KV10111100
(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 LMA053
S-NT564
WBIA0539E

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SYMPTOM DIAGNOSIS
OVERHEATING CAUSE ANALYSIS
Troubleshooting Chart INFOID:0000000004784346
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 viscosity —
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 system Cylinder head deterioration
Cylinder head gasket deteri-
oration

Changing Engine Coolant " .
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belts.
2. Steer front wheel to the right.
3. Remove front fender protector (RH). Refer to EI-24, " Removal and Installation " .
4. Loosen mounting bolts of water pump pulley before loosening belt tension of drive belt.
5. Remove drive belt. Refer to EM-15, " Removal and Installation " .
6. Remove water pump pulley.
7. 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 pump 3. Water pump pulley
KBIA3393J

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• Tighten bolts in numerical order as shown.
Water pump pulley. CAUTION:
Never install mounting bolts (A) to oblong holes (B).
• Water pump pulley (1)
Inspection INFOID:0000000004784363
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-11, " Inspection " .
• Start and warm up the engine. Visually check for leaks of engine coolant. PBIC3809E

CO-30< SERVICE INFORMATION >
[MR18DE]
PREPARATION
PREPARATION
Special Service Tool INFOID:0000000004673018
The actual shapes of Kent-Moore tools may from those of special service tools illustrated here.
Commercial Service Tool INFOID:0000000004673019
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)
KV10111100
(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

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WATER PUMP
Component INFOID:0000000004305244
Removal and Installation INFOID:0000000004305245
REMOVAL 1. Drain engine coolant from radiator. Refer to CO-35, " Changing Engine Coolant " .
CAUTION:
Perform this step when the engine is cold.
2. Remove fender protector (RH). Refer to EI-24, " Removal and Installation " .
3. Remove drive belt. Refer to EM-136, " Removal and Installation " .
4. Remove generator. Refer to SC-25, " Removal and Installation " .
5. Remove radiator hose (lower). Refer to CO-38, " Component " .
6. Remove water pump. 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.
INSPECTION AFTER REMOVAL • Visually check that 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.
INSTALLATION Installation is in the reverse order of removal.
INSPECTION AFTER INSTALLATION • Check that the reservoir tank cap is tightened. 1. Gasket 2. Water pump
PBIC3313J

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THERMOSTAT
Component INFOID:0000000004305246
Removal and Installation INFOID:0000000004305247
REMOVAL 1. Drain engine coolant from radiator. Refer to CO-35, " Changing Engine Coolant " .
CAUTION:
• Perform this step when engine is cold.
• Never spill engine coolant on drive belt.
2. Remove the air duct (inlet). Refer to EM-139, " Component " .
3. Remove the radiator hose (lower) from the engine. Refer to CO-38, " Component " .
4. Remove water inlet.
5. Remove thermostat.
6. Remove water pump, if necessary. Refer to CO-43 .
7. Remove thermostat housing, if necessary.
INSPECTION AFTER REMOVAL 1. Thermostat housing 2. Water hose (models with oil cooler) 3. Radiator hose (lower)
4. Water inlet 5. Thermostat 6. Rubber ring
7. Gasket A. To oil cooler B. To radiator Engine front