engine coolant NISSAN NAVARA 2005 Repair User Guide

ENGINE COOLANT
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3. Fill radiator and reservoir tank to the specified level.
lPour engine coolant through engine coolant filler neck
slowly of less than 2 (1-3/4 lmp qt) a minute to allow air
in system to escape.
lUse Genuine Nissan Anti-freeze Coolant (L250) or equiva-
lent in its quality. Refer toMA-14, "
RECOMMENDED FLU-
IDS AND LUBRICANTS".
lWhen engine coolant overflows air relief hole, install air relief
plug.
4. Warm up engine to normal operating temperature without radiator cap and reservoir tank cap installed.
lIf engine coolant overflows radiator filler hole and reservoir tank filler hole, install radiator cap
and reservoir tank cap.
5. Run engine at 3,000 rpm for 10 seconds and return to idle speed with radiator cap installed.
lRepeat two or three times.
CAUTION:
Watch engine coolant temperature gauge so as not to overheat the engine.
6. Stop engine and cool down to less than approximately 50°C(122°F).
lCool down using a fan to reduce the time.
lIf necessary, refill radiator up to filler neck with engine coolant.
7. Refill reservoir tank to MAX level line with engine coolant.
8. Repeat steps 3 through 6 two or more times with radiator cap installed until engine coolant level no longer
drops.
9. Check cooling system for leaks with engine running.
10. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000
rpm with heater temperature controller set at several position between COOL and WARM.
lSound may be noticeable at heater unit.
11. Repeat step 10 three times.
12. If sound is heard, bleed air from cooling system by repeating steps 3 through 6 until engine coolant level
no longer drops.
FLUSHING COOLING SYSTEM
1. Fill radiator with water until water spills from the air relief hole, then close air relief plug. Fill radiator and
reservoir tank with water and reinstall radiator cap and reservoir tank cap.
2. Run engine and warm it up to normal operating temperature.
3. Rev engine two or three times under no-load.
4. Stop engine and wait until it cools down.
5. Drain water from the system. Refer toCO-8, "
DRAINING ENGINE COOLANT". Engine coolant capacity
(with reservoir tank at “MAX” level)
LHD models
: Approx. 9.9 (8-3/4 lmp qt)
RHD models
: Approx. 10.2 (9 lmp qt)
SMA182B
Reservoir tank capacity (at “MAX” level)
: 0.8 (3/4 lmp qt)
SMA412B

CO-10
ENGINE COOLANT
6. Repeat steps 1 through 5 until clear water begins to drain from radiator.

RADIATOR
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RADIATORPFP:21400
ComponentsEBS01F6F
lRefer toGI-10, "Components"for symbol marks except in the above.
Removal and InstallationEBS01E6R
WARNING:
Do not remove radiator cap and/or reservoir tank cap when engine is hot. Serious burns could occur
from high-pressure engine coolant escaping from radiator and/or reservoir tank.
REMOVAL
1. Drain engine coolant from radiator. Refer toCO-8, "DRAINING ENGINE COOLANT".
CAUTION:
lPerform this step when engine is cold.
lDo not spill engine coolant on drive belts.
2. Remove battery. Refer toSC-5, "
BATTERY".
1. Radiator mounting bracket 2. Mounting rubber (upper) 3. Radiator cap
4. Radiator 5. Mounting rubber (lower) 6. Radiator hose (upper)
7. A/T fluid cooler hose 8. A/T fluid cooler hose 9. O-ring
10. Drain plug 11. Cooling fan assembly (models with
A/C)12. Radiator shroud (upper)
13. Radiator hose (lower) 14. Radiator shroud (lower) 15. Reservoir tank hose
16. Reservoir tank cap 17. Reservoir tank 18. Water hose
A. To heater return tube B. To water outlet C. To A/T fluid cooler tube
D. To water inlet Vehicle front
PBIC3349E

CO-12
RADIATOR
3. Remove engine cover. Refer toEM-20, "INTAKE MANIFOLD".
4. Remove air inlet hoses between engine to charge air cooler. Refer toEM-18, "
CHARGE AIR COOLER".
5. Disconnect radiator hose (upper and lower) and reservoir tank hose.
CAUTION:
Be careful not to allow engine coolant to contact drive belts.
6. Remove reservoir tank.
7. Remove cooling fans (crankshaft driven type and motor driven type) and radiator shrouds (upper and
lower). Refer toCO-19, "
COOLING FAN".
8. Disconnect A/T fluid cooler hoses. (A/T models)
lInstall blind plug to avoid leakage of A/T fluid.
9. Remove radiator mounting brackets.
10. Remove the two A/C condenser bolts. (models with A/C)
11. Remove radiator.
Remove radiator as follows (models with A/C):
CAUTION:
Do not damage or scratch A/C condenser and radiator core when removing.
a. With lifting and pulling radiator (3) in a rear direction, remove
radiator lower mount (4) from radiator core support (1).
CAUTION:
Because A/C condenser (2) is onto the front-lower portion
of radiator (3), moving to rear direction should be at mini-
mum.
b. Lift A/C condenser up and remove radiator.
CAUTION:
Lifting A/C condenser should be minimum to prevent a load
to A/C piping.
c. After removing radiator, temporarily secure it with rope or similar
means to prevent a load to A/C piping.
LBIA0421E
: Vehicle front
PBIC3350E
PBIC1054E

RADIATOR
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INSPECTION AFTER REMOVAL
Checking Reservoir Tank Cap
lInspect valve seat of reservoir tank cap.
–Check if valve seat is swollen to the extent that the edge of the
plunger cannot be seen when watching it vertically from the top.
–Check if valve seat has no soil and damage.
lPull negative-pressure valve to open it, and make sure that it is
completely closed when released.
–Make sure that there is no dirt or damage on the valve seat of
radiator cap negative-pressure valve.
–Make sure that there are no unusualness in the opening and
closing conditions of negative-pressure valve.
lCheck reservoir tank cap relief pressure.
–When connecting reservoir tank cap to the radiator cap tester
adapter [SST] and the radiator cap tester (Commercial service
tool), apply engine coolant to the cap seal surface.
lReplace reservoir tank cap if there is an unusualness in negative pressure valve, or if the relief pressure
falls below the limit.
CAUTION:
When installing a radiator cap and reservoir tank cap, thoroughly wipe out the radiator and reservoir
tank filler neck to remove any waxy residue or foreign material.
Checking Radiator
Check radiator for mud or clogging. If necessary, clean radiator as follows.
lBe careful not to bend or damage the radiator fins.
lWhen radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radiator
shroud and horns. Then tape the harness and connectors to prevent water from entering.
1. Apply water by hose to the back side of the radiator core vertically downwards.
2. Apply water again to all radiator core surface once per minute.
3. Stop washing if any stains no longer flow out from the radiator.
4. Blow air into the back side of radiator core vertically downwards.
lUse compressed air lower than 490 kPa (4.9 bar, 5 kg/cm2, 71 psi) and keep distance more than 30 cm
(11.8 in).
5. Blow air again into all the radiator core surface once per minute until no water sprays out.
PBIC2816E
SMA967B
Standard : 98.2 - 117.8 kPa (0.98 - 1.18 bar, 1.0 -
1.2 kg/cm
2,14-17psi)
Limit : 59 kPa (0.59 bar, 0.6 kg/cm
2,9psi)
SLC755AC

CO-14
RADIATOR
INSTALLATION
Installation is the reverse order of removal.
INSPECTION AFTER INSTALLATION
lCheck for leaks of engine coolant using the radiator cap tester adapter [SST: EG17650301] and the radia-
tor cap tester (commercial service tool). Refer toCO-7, "
CHECKING RADIATOR SYSTEM FOR LEAKS".
lStart and warm up engine. Visually check if there is no leaks of engine coolant.

WATER PUMP
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WAT E R P U MPPFP:21020
ComponentsEBS01F6K
lRefer toGI-10, "Components"for symbol marks in the figure.
Removal and InstallationEBS01E6W
WARNING:
Do not remove radiator cap and/or reservoir tank cap when the engine is hot. Serious burns could
occur from high pressure engine coolant escaping from the radiator and/or the reservoir tank.
CAUTION:
lWhen removing water pump assembly, be careful not to get engine coolant on drive belts.
lWater pump cannot be disassembled and should be replaced as a unit.
lAfter installing water pump, connect hose and clamp securely, then check for leaks using radiator
cap tester (commercial service tool) and radiator cap tester adapter [SST: EG17650301].
REMOVAL
1. Remove front engine undercover. Refer toEI-15, "FRONT BUMPER".
2. Drain engine coolant. Refer toCO-8, "
DRAINING ENGINE COOLANT".
CAUTION:
lPerform this step when engine is cold.
lDo not spill engine coolant on drive belts.
3. Remove engine cover. Refer toEM-20, "
INTAKE MANIFOLD".
4. Remove drive belts. Refer toEM-12, "
DRIVE BELTS".
5. Remove water pump pulley. Refer toCO-19, "
Removal and Installation".
lLoosen the pulley bolts after fixing the pulley using a screwdriver etc.
6. Remove water pump.
1. Gasket 2. Water pump 3. Water pump pulley
4. Fan coupling
PBIC4057E

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WATER PUMP
lEngine coolant will leak from cylinder block, so have a receptacle ready below.
CAUTION:
lHandle the water pump vane so that it does not contact any other parts.
lWater pump cannot be disassembled and should be replaced as a unit.
INSPECTION AFTER REMOVAL
lVisually check if there is no significant dirt or rusting on the
water pump body and vane.
lMake sure that there is no looseness in the vane shaft, and that
it turns smoothly when rotated by hand.
lIf there are any unusualness, replace water pump assembly as
necessary.
INSTALLATION
lInstall in the reverse order of removal.
lInstall cooling fan (crankshaft driven type) with the front mark “AISIN” facing the front of engine. Refer to
CO-19, "
Removal and Installation".
INSPECTION AFTER INSTALLATION
lCheck for leaks of engine coolant using the radiator cap tester adapter [SST: EG17650301] and the radia-
tor cap tester (commercial service tool). Refer toCO-7, "
CHECKING RADIATOR SYSTEM FOR LEAKS".
lStart and warm up engine. Visually check if there is no leaks of engine coolant.
PBIC3354E

THERMOSTAT AND WATER PIPING
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THERMOSTAT AND WATER PIPINGPFP:21200
ComponentsEBS01F6L
lRefer toGI-10, "Components"for symbol marks in the figure.
1. Engine coolant temperature sensor 2. Gasket 3. Water outlet
4. Gasket 5. Thermostat housing 6. Rubber ring
7. Thermostat 8. Water inlet 9. Gasket
10. Heater return pipe (4WD models) 11. Water hose 12. Heater feed pipe (A/T models)
13. O-ring 14. Heater feed pipe (M/T models) 15. Heater return pipe (2WD models)
A. To EGR cooler B. To radiator upper hose C. To radiator lower hose
D. To turbocharger E. To heater return hose F. To heater feed hose
PBIC4100E

CO-24
THERMOSTAT AND WATER PIPING
Removal and Installation
EBS01E6X
WARNING:
Do not remove radiator cap and/or reservoir tank cap when engine is hot. Serious burns could occur
from high pressure engine coolant escaping from radiator and/or reservoir tank.
REMOVAL
1. Remove front engine undercover and middle engine undercover. Refer toEI-15, "FRONT BUMPER".
2. Drain engine coolant from radiator drain plug at the bottom of radiator, and from water drain plug at the
side of cylinder block. Refer toCO-7, "
Changing Engine Coolant"andEM-110, "CYLINDER BLOCK".
CAUTION:
Perform this step when engine is cold.
3. Remove engine cover. Refer toEM-20, "
INTAKE MANIFOLD".
4. Disconnect radiator hoses (upper and lower) from engine side. Refer toCO-11, "
RADIATOR".
5. Remove air inlet pipe and air duct between air cleaner case and turbocharger. Refer toEM-15, "
AIR
CLEANER AND AIR DUCT"andEM-28, "TURBO CHARGER".
6. Remove water outlet, water inlet and thermostat.
7. Remove thermostat housing.
8. Disconnect heater return hose and water hoses at heater return pipe side, and remove heater return pipe.
9. Remove oil level gauge guide mounting bolt, vacuum hoses (to turbocharger boost control solenoid valve)
and spill hose. Refer toEM-36, "
OIL PAN AND OIL STRAINER",EM-20, "INTAKE MANIFOLD"andEM-
44, "INJECTION TUBE AND FUEL INJECTOR".
10. Disconnect water hoses (to EGR cooler) (A/T models), vacuum hoses and heater feed hose at heater
feed pipe side, and remove heater feed pipe. Refer toEM-20, "
INTAKE MANIFOLD".
INSPECTION AFTER REMOVAL
Thermostat
lPlace a string so that it is caught in the valves of the thermostat.
Immerse fully in a container filled with water. Heat while stirring.
lThe valve opening temperature is the temperature at which the
valve opens and falls from the thread.
lContinue heating. Check the full-open lift amount.
lAfter checking the full-open lift amount, lower the water temper-
ature and check the valve closing temperature.
Standard values
lIf out of the standard, replace thermostat.
INSTALLATION
Note the following, and install in the reverse order of removal.
lSecurely insert each hose, and install clamp at a position where it does not interfere with the pipe bulge.
lWhen inserting heater feed pipe end into cylinder head, apply a neutral detergent to O-ring. Then insert it
immediately.
SLC252B
Item Thermostat
Valve opening temperature 80.5 - 83.5°C (177 - 182°F)
Full-open lift amount More than 9 mm/ 95°C (0.35 in/ 203°F)
Valve closing temperature More than 77°C(171°F)