Nissan Pathfinder (2005 year). Instruction — part 133
COOLING SYSTEM
CO-7
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2005 Pathfinder
COOLING SYSTEM
PFP:21020
Cooling Circuit
EBS00KJR
WBIA0564E
1.
Cylinder block (RH)
2.
Oil cooler
3.
Cylinder head (RH)
4.
Water pump
5.
Radiator
6.
Water inlet
7.
Thermostat
8.
Cylinder head (LH)
9.
Heater pump
10. Cylinder block (LH)
CO-8
COOLING SYSTEM
2005 Pathfinder
System Chart
EBS00KJS
WBIA0565E
ENGINE COOLANT
CO-9
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2005 Pathfinder
ENGINE COOLANT
PFP:KQ100
System Check
EBS00M43
WARNING:
●
Never remove the radiator/reservoir cap when the engine is hot. Serious burns could occur from
high pressure fluid escaping from the radiator.
●
Wrap a thick cloth around the cap. Slowly push down and turn it a quarter turn to allow built-up
pressure to escape. Carefully remove the cap by pushing down and turning it all the way.
CHECKING COOLING SYSTEM HOSES
Check hoses for the following:
●
Improper attachment
●
Leaks
●
Cracks
●
Damage
●
Loose connections
●
Chafing
●
Deterioration
CHECKING RESERVOIR LEVEL
●
Check if the reservoir tank coolant level is within MIN to MAX
when the engine is cool.
●
Adjust coolant level if it is too much or too little.
CHECKING COOLING SYSTEM FOR LEAKS
To check for leakage, apply pressure to the cooling system using
Tool.
WARNING:
Never remove the radiator/reservoir cap when the engine is hot.
Serious burns could occur from high pressure coolant escap-
ing from the radiator.
CAUTION:
Higher pressure than specified may cause radiator damage.
SMA412B
Tool number
: EG17650301 (J-33984-A)
Testing pressure
: 137 kPa (1.4 kg/cm
2
, 20 psi)
WBIA0568E
CO-10
ENGINE COOLANT
2005 Pathfinder
CHECKING RESERVOIR CAP
1.
Check reservoir cap relief pressure using Tool.
●
When connecting the reservoir cap to the tester, apply water
or coolant to the cap seal surface.
●
Replace the reservoir cap if there is an abnormality in the
negative-pressure valve, or if the open-valve pressure is out-
side of the standard values.
CHECKING RADIATOR
Check radiator for mud or clogging. If necessary, clean radiator as follows.
●
Be careful not to bend or damage the radiator fins.
●
When radiator is cleaned without removal, remove all surrounding parts such as cooling fan shroud and
horns. Then tape the harness and electrical connectors to prevent water from entering.
1.
Apply water by hose to the back side of the radiator core, with the hose pointed vertically downward.
2.
Apply water again to all radiator core surfaces 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, with the air hose pointed vertically downward.
●
Use compressed air lower than 490 kPa (5 kg/cm
2
, 71 psi) and keep distance more than 30 cm (11.8 in).
5.
Blow air again into all the radiator core surfaces once per minute until no water sprays out.
6.
Check for leaks.
Refilling Engine Coolant
EBS00M44
Changing the engine coolant is part of the required maintenance of the engine. Refer to
.
Tool number
: EG17650301 (J-33984-A)
Standard: 78 – 98 kPa (0.8 – 1.0 kg/cm
2
, 11 – 14 psi)
Limit: 59 kPa (0.6 kg/cm
2
, 9 psi)
WBIA0570E
RADIATOR
CO-11
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2005 Pathfinder
RADIATOR
PFP:21400
Removal and Installation
EBS00KJV
WARNING:
Do not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine
coolant escaping from radiator. Wrap a thick cloth 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.
Remove engine cover with power tool. Refer to
EM-12, "Removal and Installation"
.
2.
Drain engine coolant from radiator. Refer to
.
CAUTION:
●
Perform this step when engine is cold.
●
Do not spill engine coolant on drive belts.
3.
Remove air duct and air cleaner case assembly. Refer to
EM-15, "Removal and Installation"
.
4.
Remove reservoir tank hose.
5.
Removal radiator hoses (upper and lower) and reservoir tank hose.
CAUTION:
Be careful not to allow engine coolant to contact drive belts.
6.
Remove radiator cooling fan assembly. Refer to
.
1.
Reservoir tank
2.
Reservoir tank cap
3.
Reservoir tank hose
4.
Radiator hose (upper)
5.
Upper mount bracket
6.
Mounting rubber (upper)
7.
Radiator cap
8.
Radiator
9.
Mounting rubber (lower)
10. Radiator drain plug
11.
O-ring
12. A/T fluid cooler hose
13. Radiator hose (lower)
14. Heater bypass tube
15. Heater bypass hose
LBIA0418E
CO-12
RADIATOR
2005 Pathfinder
7.
Disconnect A/T fluid cooler hoses. (A/T models)
●
Install blind plug to avoid leakage of A/T fluid.
8.
Remove the upper mount bracket bolts.
9.
Remove the two A/C condenser bolts.
10. Remove radiator as follows:
CAUTION:
Do not damage or scratch A/C condenser and radiator core when removing.
a.
With lifting and pulling radiator in a rear direction, disassemble
lower mount from radiator core support center.
CAUTION:
Because A/C condenser is onto the front-lower portion of
radiator, moving to rear direction should be at minimum.
b.
Lift A/C condenser up and remove radiator after disengaging the
fitting as front-bottom surface.
CAUTION:
Lifting A/C condenser should be minimum to prevent a load
to A/C piping.
c.
After removing radiator, put A/C condenser on radiator core sup-
port center to prevent a load to A/C piping, and temporarily fix it
with rope or similar means.
LBIA0419E
LBIA0421E
PBIC1936E
PBIC1054E
RADIATOR
CO-13
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2005 Pathfinder
INSTALLATION
Installation is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
●
Check for leaks of engine coolant using tool. Refer to
CO-9, "CHECKING COOLING SYSTEM FOR
.
●
Start and warm up engine. Visually check there are no leaks of engine coolant and A/T fluid.
CO-14
ENGINE COOLING FAN
2005 Pathfinder
ENGINE COOLING FAN
PFP:21140
Removal and Installation (Crankshaft driven type)
EBS00M45
REMOVAL
1.
Remove air duct. Refer to
EM-15, "Removal and Installation"
.
2.
Remove the engine front undercover.
3.
Remove the upper and lower radiator shrouds. Refer to
CO-11, "Removal and Installation"
.
4.
Remove drive belts. Refer to
EM-13, "Removal and Installation"
.
5.
Remove cooling fan.
INSPECTION AFTER REMOVAL
Fan Coupling
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
assembly.
INSTALLATION
Installation is in the reverse order of removal.
●
Install cooling fan with its front mark “F” facing front of engine. Refer to
CO-14, "Removal and Installation
.
1.
Cooling fan
2.
Fan coupling
3.
Fan bracket
4.
Cooling fan pulley
WBIA0575E
SLC072
LBIA0422E
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