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B ENGINE
SECTION CO
ENGINE COOLING SYSTEM
CONTENTS
A
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PRECAUTIONS ......................................................... |
2 |
Precautions for Liquid Gasket ................................. |
2 |
LIQUID GASKET APPLICATION PROCEDURE..... |
2 |
PREPARATION .......................................................... |
3 |
Special Service Tools .............................................. |
3 |
Commercial Service Tools ....................................... |
3 |
OVERHEATING CAUSE ANALYSIS ......................... |
4 |
Troubleshooting Chart ............................................. |
4 |
COOLING SYSTEM ................................................... |
6 |
Cooling Circuit ......................................................... |
6 |
System Chart ........................................................... |
7 |
ENGINE COOLANT ................................................... |
8 |
Inspection ................................................................ |
8 |
CHECKING ENGINE COOLANT LEVEL ............. |
8 |
CHECKING LEAKAGE ........................................ |
8 |
Changing Engine Coolant ....................................... |
8 |
DRAINING ENGINE COOLANT .......................... |
8 |
REFILLING ENGINE COOLANT ......................... |
9 |
FLUSHING COOLING SYSTEM ........................ |
10 |
RADIATOR ................................................................ |
11 |
Removal and Installation ........................................ |
11 |
REMOVAL ........................................................... |
11 |
INSTALLATION .................................................. |
12 |
INSPECTION AFTER INSTALLATION .............. |
12 |
Checking Radiator Cap ......................................... |
12 |
Checking Radiator ................................................. |
12 |
RADIATOR (ALUMINUM TYPE) ............................. |
14 |
Disassembly and Assembly .................................. |
14 |
PREPARATION .................................................. |
14 |
DISASSEMBLY .................................................. |
14 |
ASSEMBLY ........................................................ |
15 |
INSPECTION ..................................................... |
17 |
COOLING FAN ......................................................... |
18 |
Removal and Installation ....................................... |
18 |
REMOVAL .......................................................... |
18 |
INSTALLATION .................................................. |
18 |
INSPECTION AFTER INSTALLATION ............... |
18 |
Disassembly and Assembly ................................... |
19 |
DISASSEMBLY .................................................. |
19 |
INSPECTION AFTER DISASSEMBLY ............... |
19 |
ASSEMBLY ........................................................ |
19 |
WATER PUMP ......................................................... |
20 |
Removal and Installation ....................................... |
20 |
REMOVAL .......................................................... |
20 |
INSPECTION AFTER REMOVAL ...................... |
21 |
INSTALLATION .................................................. |
21 |
INSPECTION AFTER INSTALLATION ............... |
21 |
THERMOSTAT AND WATER CONTROL VALVE ... 22 |
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Removal and Installation ....................................... |
22 |
REMOVAL .......................................................... |
22 |
INSPECTION AFTER REMOVAL ...................... |
23 |
INSTALLATION .................................................. |
23 |
INSPECTION AFTER INSTALLATION ............... |
23 |
SERVICE DATA AND SPECIFICATIONS (SDS) ..... |
24 |
Standard and Limit ................................................. |
24 |
ENGINE COOLANT CAPACITY (APPROXI- |
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MATE) ................................................................. |
24 |
RADIATOR ......................................................... |
24 |
THERMOSTAT ................................................... |
24 |
WATER CONTROL VALVE ................................ |
24 |
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Revision: 2005 March |
CO-1 |
2005 X-Trail |
PRECAUTIONS
PRECAUTIONS
Precautions for Liquid Gasket
LIQUID GASKET APPLICATION PROCEDURE
PFP:00001
ABS00CK4
1.Remove old liquid gasket adhering to the liquid gasket application surface and the mating surface.
●Remove liquid gasket completely from the liquid gasket application surface, mounting bolts, and bolt holes.
2.Wipe the liquid gasket application surface and the mating surface with white gasoline (lighting and heating use) to remove adhering moisture, grease and foreign materials.
3.Attach liquid gasket tube to the tube presser [SST: WS39930000 ( — )].
Use Genuine RTV Silicone Sealant or equivalent. Refer to GI-48, "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS" .
●Within 5 minutes of liquid gasket application, install the mating component.
●If liquid gasket protrudes, wipe it off immediately.
●Do not retighten mounting bolts or nuts after the installation.
●Wait 30 minutes or more after installation before refilling
EMA0622D
engine oil and engine coolant.
Revision: 2005 March |
CO-2 |
2005 X-Trail |
PREPARATION
PREPARATION |
PFP:00002 |
Special Service Tools |
ABS00CK5 |
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.) Description Tool name
EG17650301 |
Adapting radiator cap tester to radiator cap |
(J33984-A) |
and radiator filler neck |
Radiator cap tester adapter |
a: 28 (1.10) dia. |
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b: 31.4 (1.236) dia. |
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c: 41.3 (1.626) dia. |
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Unit: mm (in) |
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S-NT564 |
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KV99103510 |
Installing radiator upper and lower tanks |
( — ) |
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Radiator plate pliers A |
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S-NT224 |
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KV99103520 |
Removing radiator upper and lower tanks |
( — ) |
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Radiator plate pliers B |
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S-NT225 |
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WS39930000 |
Pressing the tube of liquid gasket |
( — ) |
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Tube presser |
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S-NT052
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Commercial Service Tools |
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ABS00CK6 L |
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Tool name |
Description |
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Power tool |
Loosening nuts and bolts |
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M |
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PBIC0190E |
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Radiator cap tester |
Checking radiator and radiator cap |
PBIC1982E
Revision: 2005 March |
CO-3 |
2005 X-Trail |
OVERHEATING CAUSE ANALYSIS
OVERHEATING CAUSE ANALYSIS
Troubleshooting Chart
PFP:00012
ABS00CK7
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Symptom |
Check items |
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Water pump malfunction |
Worn or loose drive belt |
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Thermostat and water con- |
— |
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trol valve stuck closed |
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Poor heat transfer |
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Dust contamination or |
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Damaged fins |
paper clogging |
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Physical damage |
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Clogged radiator cooling |
Excess foreign material |
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tube |
(rust, dirt, sand, etc.) |
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Cooling fan does not oper- |
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ate |
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Reduced air flow |
High resistance to fan rota- |
Fan assembly |
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tion |
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Damaged fan blades |
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Damaged radiator shroud |
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Cooling sys- |
Improper engine coolant |
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tem parts |
mixture ratio |
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malfunction |
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Poor engine coolant quality |
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Engine coolant viscosity |
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Cooling hose |
Loose clamp |
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Cracked hose |
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Water pump |
Poor sealing |
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Radiator cap |
Loose |
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Engine coolant leaks |
Poor sealing |
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O-ring for damage, deterio- |
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Insufficient engine coolant |
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ration or improper fitting |
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Radiator |
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Cracked radiator tank |
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Cracked radiator core |
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Reservoir tank |
Cracked reservoir tank |
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Exhaust gas leaks into |
Cylinder head deterioration |
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Overflowing reservoir tank |
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Cylinder head gasket dete- |
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cooling system |
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rioration |
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Revision: 2005 March |
CO-4 |
2005 X-Trail |
OVERHEATING CAUSE ANALYSIS
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Symptom |
Check items |
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High engine rpm under no |
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load |
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Abusive driving |
Driving in low gear for |
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extended time |
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Driving at extremely high |
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speed |
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Overload on engine |
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Power train system mal- |
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function |
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Except cool- |
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Installed improper size |
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wheels and tires |
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ing system |
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parts mal- |
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Dragging brakes |
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function |
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Improper ignition timing |
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Blocked bumper |
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Installed car brassiere |
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Blocked radiator grille |
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Blocked or restricted air |
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Mud contamination or |
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paper clogging |
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flow |
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Blocked radiator |
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Blocked condenser |
Blocked air flow |
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Installed large fog lamp |
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A
CO
C
D
E
F
G
H
I
J
K
L
M
Revision: 2005 March |
CO-5 |
2005 X-Trail |
COOLING SYSTEM
COOLING SYSTEM
Cooling Circuit
PFP:21020
ABS00CK8
PBIC2728E
Revision: 2005 March |
CO-6 |
2005 X-Trail |
COOLING SYSTEM
System Chart
ABS00CK9
PBIC2727E
A
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F
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K
L
M
Revision: 2005 March |
CO-7 |
2005 X-Trail |
ENGINE COOLANT
ENGINE COOLANT
Inspection
CHECKING ENGINE COOLANT LEVEL
PFP:KQ100
ABS00CKA
●Check if the reservoir tank engine coolant level is within “MIN” to “MAX” range when the engine is cool.
●Adjust engine coolant level as necessary.
SMA412B
CHECKING LEAKAGE
●To check for leakage, apply pressure to the cooling system with a radiator cap tester (commercial service tool) and the radiator cap tester adapter [SST].
Testing pressure:
157 kPa (1.6 kg/cm2 , 23 psi)
WARNING:
Do not remove radiator cap when the engine is hot. Serious burns could occur from high-pressure engine coolant escaping from radiator.
CAUTION:
Higher test pressure than specified may cause radiator damage.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.
●If anything is found, repair or replace the damaged parts.
Changing Engine Coolant
WARNING:
SLC756A
ABS00CKB
●To avoid being scalded, do not change engine coolant when the engine is hot.
●Wrap a thick cloth around radiator cap and carefully remove the cap. First, turn the cap a quarter of a turn to release built-up pressure. Then turn the cap all the way.
●Be careful not to allow engine coolant to contact drive belt.
DRAINING ENGINE COOLANT
1.Remove RH and LH undercovers.
2.Open radiator drain plug at the bottom of radiator, and then remove radiator cap.
PBIC2250E
When drain all of engine coolant in the system, open water drain plug on cylinder block. Refer to EM-82, "CYLINDER BLOCK" .
3.Remove reservoir tank as necessary, and drain engine coolant and clean reservoir tank before installing.
Revision: 2005 March |
CO-8 |
2005 X-Trail |
Loading...