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CO-16Revision: June 2006
COOLING FAN
2007 Versa
Removal and InstallationEBS00U83
REMOVAL
1. Drain engine coolant from radiator. Refer to CO-8, "DRAINING 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-16, "
Components" .
3. Remove reservoir tank. Refer to CO-11, "
Components" .
4. Disconnect radiator hose (upper) at radiator side. Refer to CO-11, "
Components" .
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 the reverse order of removal.
Cooling fans are controlled by ECM. For details, refer to EC-443, "DTC P1217 ENGINE OVER TEMPER-
AT U R E" .
CAUTION:
Be careful not to damage or scratch the radiator core.
DISASSEMBLY AND ASSEMBLYEBS00V62
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 the reverse order of disassembly.
Page 890 of 2896

WATER PUMP
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WATER P UM PPFP:21020
ComponentsEBS00U84
Removal and InstallationEBS00U85
REMOVAL
1. Drain engine coolant. Refer to CO-8, "DRAINING ENGINE COOLANT" .
CAUTION:
Perform this step when the engine is cold.
2. Remove drive belt auto-tensioner. Refer to EM-37, "
TIMING CHAIN" .
3. 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 for leaks of engine coolant. Refer to CO-8, "Inspection" .
Start and warm up the engine. Visually check if there is no leaks of engine coolant.
1. Gasket 2. Water pump
PBIC3921E
PBIC3313J
Page 891 of 2896
CO-18Revision: June 2006
THERMOSTAT
2007 Versa
THERMOSTATPFP:21200
ComponentsEBS00U6H
Removal and InstallationEBS00U6I
REMOVAL
1. Drain engine coolant. Refer to CO-8, "DRAINING ENGINE COOLANT" .
2. Remove water inlet.
3. Remove thermostat.
4. Remove water pump. Refer to CO-17, "
WAT ER PUM P" .
5. Remove thermostat housing.
INSPECTION AFTER REMOVAL
Place a thread (A) so that it is caught in the valves of thermostat
(1). Immerse fully in a container (B) filled with water. Heat while
stirring.
The valve opening temperature is the temperature at which the
valve opens and falls from the thread.
Continue heating. Check the full open valve lift amount.
After checking the maximum valve lift amount, lower the water
temperature and check the valve closing temperature.
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
PBIC4485E
PBIC3314J
Page 892 of 2896

THERMOSTAT
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If out of the specification, replace thermostat.
INSTALLATION
Installation is in the reverse order of removal.
Thermostat
CAUTION:
Replace the rubber ring with a new one.
Install thermostat while making rubber ring (1) groove fit to ther-
mostat flange (A) around the whole circumference.
Install thermostat (1) into the thermostat housing (2) with jiggle
valve (A) facing upwards.
Thermostat Housing
CAUTION:
Replace the rubber ring with a new one.
Securely insert the rubber ring into the mating groove of thermostat housing and install it.
Install the thermostat housing to the cylinder block without displacing the gasket from the gasket position.
INSPECTION AFTER INSTALLATION
Check for leaks of engine coolant. Refer to CO-8, "CHECKING COOLING SYSTEM FOR LEAKS" .
Start and warm up the engine. Visually check for engine coolant leaks.
ItemsThermostat
Valve opening temperature 80.5 - 83.5°C (177 - 182°F)
Maximum valve lift 8 mm/ 95°C (0.315 in/ 203°F)
Valve closing temperature 77°C (171°F)
PBIC3315J
PBIC3548J
Page 893 of 2896
CO-20Revision: June 2006
WATER OUTLET AND WATER CONTROL VALVE
2007 Versa
WATER OUTLET AND WATER CONTROL VALVEPFP:11060
ComponentsEBS00U86
Removal and InstallationEBS00U87
REMOVAL
1. Drain engine coolant. Refer to CO-8, "DRAINING ENGINE COOLANT" .
CAUTION:
Perform this step when the engine is cold.
2. Remove air duct. Refer to EM-16, "
Components" .
3. Remove radiator hose (upper). Refer to CO-11, "
Components" .
4. Remove heater hoses and water hoses.
5. Remove water outlet.
6. Remove water control valve.
7. Remove engine coolant temperature sensor, if necessary.
CAUTION:
Handle carefully to avoid any shock to engine coolant temperature sensor.
Replace the gasket with a new one.
1. Engine coolant temperature sensor 2. Rubber ring 3. Water control valve
4. Gasket 5. Water hose 6. Gasket
7. Water hose 8. Water outlet 9. Heater hose
10. Heater hose 11. Radiator hose (upper) Front
A. To heater B. To electric throttle control actuator C. To radiator
PBIC4699E
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WATER OUTLET AND WATER CONTROL VALVE
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INSPECTION AFTER REMOVAL
Place a thread (A) so that it is caught in the valves of water con-
trol valve (1). Immerse fully in a container (B) filled with water.
Heat while stirring.
The valve opening temperature is the temperature at which the
valve opens and falls from the thread.
Continue heating. Check the full open valve lift amount.
NOTE:
The maximum valve lift amount standard temperature for water
control valve is the reference value.
After checking the maximum valve lift amount, lower the water
temperature and check the valve closing temperature.
If out of the specification, replace water control valve.
INSTALLATION
Installation is in the reverse order of removal.
Water Control Valve
CAUTION:
Replace the rubber ring with a new one.
Install water control valve while making rubber ring (1) groove fit
to water control valve flange (A) around the whole circumfer-
ence.
While the mark (A) points to up, install water control valve (2)
with frame center (B) facing straight upward into water outlet (1).
Water Outlet
Install the water control valve to the cylinder head without displacing the valve from the valve position.
Valve opening temperature 93.5 - 96.5°C (200 - 206°F)
Maximum valve lift 8 mm/ 108°C (0.315 in/ 226°F)
Valve closing temperature 90°C (194°F)
PBIC3314J
PBIC3317J
PBIC4700E
Page 895 of 2896
CO-22Revision: June 2006
WATER OUTLET AND WATER CONTROL VALVE
2007 Versa
Water H oses
Install water hoses (3),(5) as shown.
Electric throttle control actuator (1)
Clamp (2)
Water outlet (4)
Paint mark (A)
Clamp shall not interfere with the bulged area (B)
INSPECTION AFTER INSTALLATION
Check for leaks of engine coolant. Refer to CO-8, "Inspection" .
Start and warm up the engine. Visually check if there is no leaks of engine coolant.
PBIC4703E
Page 896 of 2896
SERVICE DATA AND SPECIFICATIONS (SDS)
CO-23
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SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Standard and LimitEBS00T7Q
CAPACITY
Unit: (US qt, lmp qt)
THERMOSTAT
WATER CONTROL VALVE
RADIATOR
Unit: kPa (bar, kg/cm2 , psi)
Engine coolant capacity (with reservoir tank at “MAX” level) Approx. 6.8 (7 1/4, 6.0)
Valve opening temperature 80.5 - 83.5°C (177 - 182°F)
Maximum valve lift 8 mm/ 95°C (0.315 in/ 203°F)
Valve closing temperature 77°C (171°F)
Valve opening temperature 93.5 - 96.5°C (200 - 206°F)
Maximum valve lift 8 mm/ 108°C (0.315 in/ 226°F)
Valve closing temperature 90°C (194°F)
Cap relief pressureStandard 78 - 98 (0.78 - 0.98, 0.8 - 1.0, 11- 14)
Limit 59 (0.59, 0.6, 9)
Leakage test pressure 157 (1.57, 1.6, 23)