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B ENGINE
A
ENGINE COOLING SYSTEM
SECTION CO CO
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 2
. Removal and Installation (Crankshaft driven type) 18 ... F
Precautions for Supplemental Restraint System REMOVAL .......................................................... 18
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- INSPECTION AFTER REMOVAL ...................... 18 .
SIONER" ................................................................. 2
. INSTALLATION .................................................. 18 . G
Precautions for Liquid Gasket ................................. 2 . INSPECTION AFTER INSTALLATION ............... 19 .
REMOVAL OF LIQUID GASKET SEALING ......... 2 . Removal and Installation (Motor driven type) ........ 19 .
LIQUID GASKET APPLICATION PROCEDURE 2 ..... REMOVAL .......................................................... 19
.
H
PREPARATION .......................................................... 4
. INSTALLATION .................................................. 19 .
Special Service Tools .............................................. 4
. WATER PUMP ......................................................... 20.
Commercial Service Tools ....................................... 5 . Removal and Installation ....................................... 20 .
OVERHEATING CAUSE ANALYSIS ......................... 6 . REMOVAL .......................................................... 20
. I
Troubleshooting Chart ............................................. 6
. INSPECTION AFTER REMOVAL ...................... 22 .
COOLING SYSTEM ................................................... 8 . INSTALLATION .................................................. 22 .
Cooling Circuit ......................................................... 8
. INSPECTION AFTER INSTALLATION ............... 23 . J
System Chart .......................................................... 9
. WATER INLET AND THERMOSTAT ASSEMBLY ... 25
ENGINE COOLANT ................................................. 10 . Removal and Installation ....................................... 25 .
System Check ....................................................... 10
. REMOVAL .......................................................... 25
.
K
CHECKING COOLING SYSTEM HOSES ......... 10 . INSPECTION AFTER REMOVAL ...................... 25 .
CHECKING RESERVOIR LEVEL ...................... 10 . INSTALLATION .................................................. 26 .
CHECKING COOLING SYSTEM FOR LEAKS ... 10 INSPECTION AFTER INSTALLATION ............... 26 .
CHECKING RESERVOIR CAP ...........................11 . WATER OUTLET AND WATER PIPING .................. 27 . L
CHECKING RADIATOR ......................................11 . Removal and Installation ....................................... 27 .
Changing Engine Coolant ......................................11 . REMOVAL .......................................................... 27
.
DRAINING ENGINE COOLANT .........................11 . INSTALLATION .................................................. 27 . M
REFILLING ENGINE COOLANT ....................... 12 . INSPECTION AFTER INSTALLATION ............... 27 .
FLUSHING COOLING SYSTEM ........................ 14 . SERVICE DATA AND SPECIFICATIONS (SDS) ..... 29 .
RADIATOR ............................................................... 15
. Standard and Limit ................................................. 29
.
Removal and Installation ....................................... 15 . ENGINE COOLANT CAPACITY (APPROXI-
REMOVAL .......................................................... 15
. MATE) ................................................................. 29
.
INSTALLATION .................................................. 17. RADIATOR ......................................................... 29
.
INSPECTION AFTER INSTALLATION .............. 17 . THERMOSTAT ................................................... 29 .
ENGINE COOLING FAN ......................................... 18 .
Revision: September 2005 CO-1 2006 Xterra
PRECAUTIONS
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EBS00T57
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:
G To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
G Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
G Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Liquid Gasket EBS00NLV
REMOVAL OF LIQUID GASKET SEALING
G After removing nuts and bolts, separate the mating surface, using Tool and remove old liquid gasket seal-
ing.
Tool number : KV10111100 (J-37228)
CAUTION:
Be careful not to damage the mating surfaces.
G Tap Tool to insert it, and then slide it by tapping on the side as
shown.
G In areas where Tool is difficult to use, use plastic hammer to
lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason suitable tool such as screw-
driver is used, be careful not to damage the mating sur- WBIA0566E
faces.
LIQUID GASKET APPLICATION PROCEDURE
1. Remove old liquid gasket adhering to the liquid gasket applica-
tion surface and the mating surface, Using scraper.
G Remove liquid gasket completely from the groove of the liquid
gasket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign materials.
PBIC0003E
3. Attach liquid gasket tube to Tool.
Revision: September 2005 CO-2 2006 Xterra
PRECAUTIONS
Tool number : WS39930000 ( -- )
A
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-48, "Recommended Chemical Products and Sealants" .
4. Apply liquid gasket without breaks to the specified location with CO
the specified dimensions.
G If there is a groove for the liquid gasket application, apply liq-
uid gasket to the groove.
C
WBIA0567E
D
G As for the bolt holes, normally apply liquid gasket inside the
holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of service manual.
E
G Within five minutes of liquid gasket application, install the mat-
ing component.
G If liquid gasket protrudes, wipe it off immediately.
F
G Do not retighten nuts or bolts after the installation.
G After 30 minutes or more have passed from the installation, fill
engine oil and engine coolant. G
CAUTION: SEM159F
If there are specific instructions in this manual, observe them.
H
I
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K
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M
Revision: September 2005 CO-3 2006 Xterra
PREPARATION
PREPARATION PFP:00002
Special Service Tools EBS00NLW
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description
(Kent-Moore No.)
Tool name
EG17650301 Adapting radiator cap tester to radiator cap
(J-33984-A) and radiator filler neck
Radiator cap tester adapter a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
S-NT564
KV10111100 Removing chain tensioner cover and water
(J-37228) pump cover
Seal cutter
NT046
WS39930000 Pressing the tube of liquid gasket
( -- )
Tube presser
S-NT052
-- Checking concentration of ethylene glycol in
(J-23688) engine coolant
Engine coolant refractometer
WBIA0539E
Revision: September 2005 CO-4 2006 Xterra
PREPARATION
Commercial Service Tools EBS00NLX
A
Tool name Description
Power tool Loosening nuts and bolts
CO
C
PBIC0190E
Radiator cap tester Checking radiator and radiator cap
D
E
PBIC1982E
F
G
H
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J
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M
Revision: September 2005 CO-5 2006 Xterra
OVERHEATING CAUSE ANALYSIS
OVERHEATING CAUSE ANALYSIS PFP:00012
Troubleshooting Chart EBS00NLY
Symptom Check items
Water pump malfunction Worn or loose drive belt
Thermostat stuck closed --
Dust contamination or
Damaged fins
Poor heat transfer paper clogging --
Heater pump Physical damage
Clogged radiator cooling Excess foreign material
tube (rust, dirt, sand, etc.)
Cooling fan does not oper-
ate
Reduced air flow High resistance to fan rota- Fan assembly --
tion
Damaged fan blades
Damaged radiator shroud -- -- --
Improper engine coolant
Cooling sys- -- -- --
mixture ratio
tem parts
malfunction Poor engine coolant quality -- Engine coolant viscosity --
Loose clamp
Cooling hose
Cracked hose
Water pump Poor sealing
Loose
Radiator cap
Poor sealing
Engine coolant leaks
O-ring for damage, deterio-
Insufficient engine coolant ration or improper fitting
Radiator
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Cylinder head deterioration
Exhaust gas leaks into
Overflowing reservoir tank Cylinder head gasket dete-
cooling system
rioration
Revision: September 2005 CO-6 2006 Xterra
OVERHEATING CAUSE ANALYSIS
Symptom Check items
A
High engine rpm under no
load
Driving in low gear for
Abusive driving CO
extended time
Driving at extremely high
speed
-- Overload on engine C
Powertrain system mal-
function
Installed improper size
Except cool- --
wheels and tires D
ing system
parts mal- Dragging brakes
function
Improper ignition timing
E
Blocked bumper --
Installed car brassiere
Blocked radiator grille Mud contamination or F
Blocked or restricted air paper clogging --
flow
Blocked radiator --
Blocked condenser G
Blocked air flow
Installed large fog lamp
H
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M
Revision: September 2005 CO-7 2006 Xterra
COOLING SYSTEM
COOLING SYSTEM PFP:21020
Cooling Circuit EBS00NLZ
WBIA0641E
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)
Revision: September 2005 CO-8 2006 Xterra
COOLING SYSTEM
System Chart EBS00NM0
A
CO
C
D
E
F
G
H
WBIA0642E I
J
K
L
M
Revision: September 2005 CO-9 2006 Xterra
ENGINE COOLANT
ENGINE COOLANT PFP:KQ100
System Check EBS00NM1
WARNING:
G Never remove the radiator/reservoir cap when the engine is hot. Serious burns could occur from
high pressure fluid escaping from the radiator.
G 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:
G Improper attachment
G Leaks
G Cracks
G Damage
G Loose connections
G Chafing
G Deterioration
CHECKING RESERVOIR LEVEL
G Check if the reservoir tank coolant level is within MIN to MAX
when the engine is cool.
G Adjust coolant level if it is too much or too little.
SMA412B
CHECKING COOLING SYSTEM FOR LEAKS
To check for leakage, apply pressure to the cooling system using
Tool.
Tool number : EG17650301 (J-33984-A)
Testing pressure : 137 kPa (1.4 kg/cm2 , 20 psi)
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: WBIA0568E
Higher pressure than specified may cause radiator damage.
Revision: September 2005 CO-10 2006 Xterra
ENGINE COOLANT
CHECKING RESERVOIR CAP
1. Check reservoir cap relief pressure using Tool. A
Tool number : EG17650301 (J-33984-A)
Standard: 78 ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo