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CO-8Revision: October 2005
COOLING SYSTEM
2005 QX56
COOLING SYSTEMPFP:21020
Cooling CircuitEBS00LN3
WBIA0439E
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COOLING SYSTEM
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System DrawingEBS00LN4
WBIA0463E
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CO-10Revision: October 2005
ENGINE COOLANT
2005 QX56
ENGINE COOLANTPFP:KQ100
InspectionEBS00LN5
LEVEL CHECK
Check if the engine coolant reservoir tank level is within MIN to
MAX level when engine is cool.
Adjust engine coolant level as necessary.
CHECKING COOLING SYSTEM FOR LEAKS
WAR NIN G:
Never remove the radiator or reservoir cap when the engine is hot. Serious burns could occur from
high-pressure engine coolant escaping from the radiator or reservoir.
To check for leakage, apply pressure to the cooling system at
the reservoir filler neck using suitable tool and Tool.
CAUTION:
Higher pressure than specified may cause radiator damage.
NOTE:
In case that engine coolant decreases, replenish cooling system
with engine coolant.
If any concerns are found, repair or replace damaged parts.
CHECKING RESERVOIR CAP
Check reservoir cap relief pressure using suitable tool and Tool.
NOTE:
Apply engine coolant to the cap seal.
Replace the reservoir cap if there is any damage in the nega-
tive-pressure valve, or if the open-valve pressure is outside of
the limit.
CHECKING RADIATOR CAP
Inspect the radiator cap.
NOTE:
Thoroughly wipe out the radiator filler neck to remove any waxy residue or foreign material.
Replace the cap if the metal plunger cannot be seen around the edge of the black rubber gasket.
Replace the cap if deposits of waxy residue or other foreign material are on the black rubber gasket or the
metal retainer.
Changing Engine CoolantEBS00LN6
Refer to MA-13, "Changing Engine Coolant" .
DRAINING ENGINE COOLANT
Refer to MA-13, "DRAINING ENGINE COOLANT" .
SM A41 2B
Tool number : EG17650301 (J-33984-A)
Leakage test pressure : 137 kPa (1.4 kg/cm, 20 psi)
WBIA0612E
Tool number : EG17650301 (J-33984-A)
Standard
: 95 - 125 kPa (0.97 - 1.28 kg/cm
2 , 14 - 18 psi)
WBIA0611E
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ENGINE COOLANT
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REFILLING ENGINE COOLANT
Refer to MA-14, "REFILLING ENGINE COOLANT" .
FLUSHING COOLING SYSTEM
Refer to MA-15, "FLUSHING COOLING SYSTEM" .
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CO-12Revision: October 2005
RADIATOR
2005 QX56
RADIATORPFP:21400
Removal and InstallationEBS00LN7
WAR NIN G:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high-pressure
engine coolant escaping from the radiator.
REMOVAL
CAUTION:
Perform when the engine is cold.
1. Remove engine room cover. Refer to EM-11, "
ENGINE ROOM COVER" .
2. Drain engine coolant from the radiator. Refer to MA-13, "
DRAINING ENGINE COOLANT" .
3. Remove air cleaner and air duct assembly. Refer to EM-14, "
REMOVAL" .
4. Disconnect A/T fluid cooler hoses.
Install blind plug to avoid leakage of A/T fluid.
5. Disconnect radiator upper and lower hoses from radiator.
CAUTION:
Do not allow coolant to contact drive belts.
WBIA0519E
1. Radiator 2. Bolt 3. Mounting rubber
4. A/T fluid cooler hose 5. Radiator hose (lower) 6. Flaps
7. Radiator shroud (upper) 8. Radiator shroud (lower) 9. Drain plug
10. Radiator hose (upper) 11. Reservoir tank hose 12. By-pass hose
13. Reservoir tank 14. Reservoir tank cap
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RADIATOR
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6. Remove the lower radiator shroud.
Release the tabs, pull lower radiator shroud rearwards and
down to remove.
7. Remove the radiator shroud upper bolts and remove the radiator
shroud upper.
8. Remove the A/C condenser bolts and brackets.
NOTE:
Lift A/C condenser up and forward to remove from radiator.
9. Remove A/T oil cooler bolts and oil cooler from radiator and
position aside.
WBIA0407E
PBIC1535E
WBIA0395E
WBIA0396E
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CO-14Revision: October 2005
RADIATOR
2005 QX56
10. Lift up and remove the radiator.
CAUTION:
Do not damage or scratch air conditioner condenser and
radiator core when removing.
INSTALLATION
Installation is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
Check for leaks of engine coolant. Refer to CO-10, "CHECKING COOLING SYSTEM FOR LEAKS" .
Start and warm up the engine. Visually check for leaks of the engine coolant and A/T fluid.
Checking RadiatorEBS00LN9
Check radiator for mud or clogging. If necessary, clean radiator as follows.
CAUTION:
Be careful not to bend or damage the radiator fins.
When radiator is cleaned without removal, remove all surrounding parts such as cooling fan, radi-
ator 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 vertically downward.
2. Apply water again to all radiator core surfaces.
3. Stop washing when dirt and debris no longer flow out from the radiator.
4. Blow air into the back side of radiator core vertically downward.
Use compressed air lower than 490 kPa (5 kg/cm2 , 71 psi) and keep distance more than 30 cm (11.8
in).
5. Blow air again into all the radiator core surfaces until no water sprays out.
PBIC1536E
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ENGINE COOLING FAN
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ENGINE COOLING FANPFP:21140
Removal and Installation (Crankshaft Driven Type)EBS00LNA
REMOVAL
1. Remove the air duct and resonator assembly. Refer to EM-14, "Removal and Installation" .
2. Remove the engine front undercover using power tool.
3. Remove the lower radiator shroud. Refer to CO-12, "
Removal and Installation" .
4. Remove the drive belt. Refer to EM-12, "
Removal and Installation" .
5. Remove the 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 cooling fan pulley.
INSTALLATION
Installation is in the reverse order of removal.
Install cooling fan with its front mark “F” facing front of engine. Refer to CO-15, "Removal and Installation
(Crankshaft Driven Type)" .
INSPECTION AFTER INSTALLATION
Check for leaks of the engine coolant. Refer to CO-10, "CHECKING COOLING SYSTEM FOR LEAKS" .
1. Cooling fan 2. Fan coupling 3. Fan bracket
4. Cooling fan pulley
WBIA0632E
SL C0 72
WBIA0418E