NISSAN LATIO 2009 Service Repair Manual

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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. 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-26, " Exploded View " .
3. 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.
4. Disconnect harness connector from fan motor, and move harness aside.
5. Disconnect A/T fluid cooler hoses if equipped. • Install plug to avoid leakage of A/T fluid if equipped.
6. Remove radiator hoses (upper and lower).
7. Remove radiator core support cover.
8. 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).
9. 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 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 " .

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Removal and Installation
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REMOVAL 1. 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-26, " 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 the reverse order of removal.
• Cooling fans are controlled by ECM. For details, refer to EC-422, " Description " .
CAUTION:
Be careful not to damage or scratch the radiator core.

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

Changing Engine Coolant " .
CAUTION:
• Perform this step when engine is cold.
• Never spill engine coolant on drive belt.
2. Add paint mark, then disconnect radiator hose (lower) from water inlet. Refer to CO-16, " Component " .
3. 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 with making rubber ring (1) groove fit to thermo- stat flange (A) with the whole circumference. 1. Radiator hose (lower) 2. Water inlet 3. Rubber ring
4. Thermostat
A. To radiator PBIC3811E

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• Install thermostat (2) into the cylinder block (1) with jiggle valve (A)
facing upwards.
Water Inlet. After installation, fix water inlet clip (A) on the oil level gauge guide
(1) positioned (B) as shown.
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INSPECTION AFTER REMOVAL WARNING:
Use a protector to prevent a burn during the work.
Thermostat • 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 full-open valve lift amount, lower the water tem- perature and check the valve closing temperature.
• If out of the standard, replace thermostat.
INSPECTION AFTER INSTALLATION • Check that the reservoir tank cap is tightened.
• Check for leaks of engine coolant using suitable tools. Refer to CO-11, " Inspection " .
• Start and warm up the engine. Visually make sure that there is no leaks of engine coolant. PBIC3755E
Thermostat " .

Changing Engine Coolant " .
CAUTION:
• Perform this step when engine is cold.
• Never spill engine coolant on drive belt.
2. Disconnect radiator hose (upper). Refer to CO-16, " Component " .
3. Disconnect harness connector from engine coolant temperature sensor and block heater, if equipped.
4. Remove electric throttle control actuator water hoses.
5. Remove heater hoses.
6. Remove water outlet.
7. Remove engine coolant temperature sens or from water outlet, if necessary.
8. Remove block heater from water outlet, if necessary (Canada only). 1. Engine coolant temperature sensor 2. Washer 3. Gasket
4. Radiator hose (upper) 5. Water outlet 6. Heater hose
7. Heater hose 8. Water hose 9. Water hose
10. Block heater (Canada only)
A. To electric throttle control actuator B. To heater core C. To radiator : Engine front

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INSTALLATION
Installation is in the reverse order of removal.
NOTE:
Insert the block heater into the water outlet until the clip is fully locked (Canada only).
Inspection INFOID:0000000004784369
INSPECTION AFTER INSTALLATION • Check that the reservoir tank cap is tightened.
• Check for leaks of engine coolant using suitable tool. Refer to CO-11, " Inspection " .
• Start and warm up the engine. Visually make sure that there is no leaks of engine coolant.