Nissan Pathfinder (2009 year). Manual — part 139
CO-20
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ENGINE COOLING FAN
Inspect fan coupling for oil leakage and bimetal conditions.
Fan Bracket
• Visually check that there is no significant looseness in the fan
bracket shaft, and that it turns smoothly by hand.
• If there are any unusual concerns, replace the fan bracket assem-
bly.
INSTALLATION
Installation is in the reverse order of removal.
• Install cooling fan with its front mark “F” facing front of engine. Refer to
CO-19, "Removal and Installation
INSPECTION AFTER INSTALLATION
• Check for leaks of the engine coolant. Refer to
• Start and warm up the engine. Visually make sure that there are no leaks of the engine coolant.
Removal and Installation (Motor driven type)
INFOID:0000000003939397
REMOVAL
1.
Remove the air dam using power tool.
2.
Remove the engine front undercover using power tool.
3.
Partially drain engine coolant from radiator. Refer to
CO-12, "Changing Engine Coolant"
.
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belts.
4.
Release the radiator shroud (lower) (2) from the radiator shroud
(upper) (1) and position aside.
• Release the tabs, pull radiator shroud (lower) (2) rearwards
and down.
5.
Remove air duct. Refer to
EM-25, "Removal and Installation"
.
6.
Remove reservoir tank hose from radiator shroud (upper).
7.
Remove the radiator shroud (upper) bolts and remove the radiator shroud (upper). Refer to
SLC072
LBIA0422E
ALBIA0470ZZ
2009 Pathfinder
ENGINE COOLING FAN
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8.
Disconnect harness connector from fan motor.
9.
Remove the bolt and remove the fan grille and motor assembly.
INSTALLATION
Installation is in the reverse order of removal.
• Cooling fan is controlled by ECM. For details, refer to
.
AWBIA0148ZZ
2009 Pathfinder
CO-22
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WATER PUMP
WATER PUMP
Exploded View
INFOID:0000000003939398
Removal and Installation
INFOID:0000000003939399
CAUTION:
• When removing water pump assembly, be careful not to get engine coolant on timing chain and drive
belt.
• Water pump cannot be disassembled and should be replaced as a unit.
• After installing water pump, connect hoses and clamps securely, then check for leaks.
REMOVAL
1.
Remove air dam using power tool.
2.
Remove engine front undercover using power tool.
3.
Remove air duct and resonator assembly. Refer to
EM-25, "Removal and Installation"
4.
Remove drive belt. Refer to
EM-13, "Removal and Installation"
.
5.
Drain engine coolant. Refer to
.
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on timing chain and drive belt.
6.
Remove radiator hose (upper).
7.
Remove cooling fan (Crankshaft driven type). Refer to
CO-19, "Removal and Installation (Crankshaft
1.
Water pump
2.
Timing chain tensioner (primary)
3.
Chain tensioner cover
4.
Water drain plug (front)
5.
Water pump cover
6.
O-ring
7.
O-ring
PBIC2833E
2009 Pathfinder
WATER PUMP
CO-23
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8.
Remove chain tensioner cover and water pump cover from front
timing chain case, using Tool.
9.
Remove timing chain tensioner (primary) as follows:
a.
Loosen clip of timing chain tensioner (primary), and release
plunger stopper (1).
b.
Insert plunger into tensioner body by pressing slack guide (2).
c.
Keep slack guide pressed and hold plunger in by pushing stop-
per pin through the tensioner body hole and plunger groove (3).
d.
Turn crankshaft pulley clockwise so that timing chain on the tim-
ing chain tensioner (primary) side is loose.
e.
Remove bolts and remove timing chain tensioner (primary).
CAUTION:
Be careful not to drop bolts inside timing chain case.
10. Remove water pump as follows:
Tool number
: KV10111100 (J-37228)
PBIC2662E
PBIC2835E
PBIC2834E
PBIC2836E
2009 Pathfinder
CO-24
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WATER PUMP
a.
Remove three water pump bolts. Secure a gap between water
pump gear and timing chain, by turning crankshaft pulley coun-
terclockwise until timing chain looseness on water pump
sprocket becomes maximum.
b.
Screw M8 bolts [pitch: 1.25 mm (0.049 in) length: approx. 50
mm (1.97 in)] into water pumps upper and lower bolt holes until
they reach timing chain case. Then, alternately tighten each bolt
for a half turn, and pull out water pump.
CAUTION:
• Pull straight out while preventing vane from contacting
socket in installation area.
• Remove water pump without causing sprocket to contact
timing chain.
• Do not spill engine coolant into timing chain case.
c.
Remove M8 bolts and O-rings from water pump.
CAUTION:
Do not disassemble water pump.
NOTE:
Do not reuse O-rings.
INSPECTION AFTER REMOVAL
• Visually check that there is no significant dirt or rust on the water pump body and vane.
• Make sure there is no looseness in the vane shaft, and that it turns
smoothly when rotated by hand.
• Replace water pump, if necessary.
INSTALLATION
1.
Install new O-rings to water pump.
NOTE:
• Apply engine oil to O-rings.
• Locate O-ring with white paint mark to engine front side.
PBIC2863E
JLC357B
SLC943A
PBIC2837E
2009 Pathfinder
WATER PUMP
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2.
Install water pump.
CAUTION:
Do not allow timing chain case to pinch O-rings when
installing water pump.
• Make sure that timing chain and water pump sprocket are
engaged.
• Insert water pump by tightening bolts alternately and evenly.
3.
Install timing chain tensioner (primary) as follows:
a.
Remove dust and foreign material completely from backside of timing chain tensioner (primary) and from
installation area of rear timing chain case.
b.
Turn crankshaft pulley clockwise so that timing chain on the timing chain tensioner (primary) side is loose.
c.
Install timing chain tensioner (primary) with its stopper pin attached.
CAUTION:
Be careful not to drop bolts inside timing chain case.
d.
Remove stopper pin.
e.
Make sure again that timing chain and water pump sprocket are engaged.
4.
Install chain tensioner cover and water pump cover as follows:
a.
Before installing, remove all traces of old liquid gasket from mat-
ing surface of water pump cover and chain tensioner cover
using scraper. Also remove traces of old liquid gasket from the
mating surface of front timing chain case.
b.
Apply a continuous bead of liquid gasket, to mating surface of chain tensioner and water pump cover,
using Tool.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-26, "Recommended Chemical Products and Sealants"
.
CAUTION:
Attaching should be done within 5 minutes after coating.
c.
Tighten bolts to specified torque. Refer to
.
PBIC1058E
PBIC2838E
SLC446B
Tool number
: WS39930000 (
—
)
PBIC2663E
2009 Pathfinder
CO-26
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WATER PUMP
5.
Refill engine coolant system. Refer to
CO-12, "Changing Engine Coolant"
.
• Apply liquid gasket to the thread of water drain plug (front).
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-26, "Recommended Chemical Prod-
6.
Installation of the remaining components is in the reverse order of removal after this step.
• After starting engine, let idle for three minutes, then rev engine up to 3,000 rpm under no load to
purge air from the high-pressure chamber of chain tensioner. Engine may produce a rattling
noise. This indicates that air still remains in the chamber and is not a matter of concern.
INSPECTION AFTER INSTALLATION
• Check for leaks of engine coolant. Refer to
.
• Start and warm up engine. Visually check for leaks of engine coolant.
2009 Pathfinder
WATER INLET AND THERMOSTAT ASSEMBLY
CO-27
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WATER INLET AND THERMOSTAT ASSEMBLY
Exploded View
INFOID:0000000003939400
Removal and Installation
INFOID:0000000003939401
REMOVAL
1.
Drain engine coolant from the radiator. Refer to
CO-12, "Changing Engine Coolant"
CAUTION:
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belts.
2.
Remove air duct and resonator assembly. Refer to
EM-25, "Removal and Installation"
3.
Disconnect radiator hose (lower) and oil cooler hose from water inlet and thermostat assembly.
4.
Remove water inlet and thermostat assembly.
CAUTION:
• Do not disassemble water inlet and thermostat assembly.
• Replace water inlet and thermostat assembly as a unit, if
necessary.
INSPECTION AFTER REMOVAL
1.
Check valve seating condition at ordinary room temperatures. It should seat tightly.
1.
Water inlet and thermostat assembly 2.
Gasket
PBIC2839E
SLC962AB
2009 Pathfinder
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