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SM8E-1L32U1(CO.fm)
ENGINE
ENGINE COOLING SYSTEM
SECTION CO CO
C
D
CONTENTS
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THERMOSTAT AND THERMOSTAT HOUS-
ING .................................................................... 20
Removal and Installation ........................................ 20
F
PRECAUTION .............................................. 3
PRECAUTIONS .................................................. 3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................. 3
Precaution for Liquid Gasket .................................... 3
WATER CONTROL VALVE .............................. 22
Removal and Installation ........................................ 22
G
SERVICE DATA AND SPECIFICATIONS
(SDS) ........................................................... 24
H
PREPARATION ........................................... 5
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................. 24
Capacity .................................................................. 24
Thermostat ............................................................. 24
Water Control Valve ............................................... 24
Radiator .................................................................. 24
VQ35DE
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PREPARATION .................................................. 5
Special Service Tool ................................................ 5
Commercial Service Tool ......................................... 5
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FUNCTION DIAGNOSIS .............................. 7
K
COOLING SYSTEM ........................................... 7
Cooling Circuit .......................................................... 7
Schematic ................................................................ 8
PRECAUTION ............................................. 25
PRECAUTIONS ................................................. 25
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ................................................................ 25
Precaution for Liquid Gasket .................................. 25
L
OVERHEATING CAUSE ANALYSIS ................. 9
Troubleshooting Chart .............................................. 9
ON-VEHICLE MAINTENANCE ................... 11
M
ENGINE COOLANT .......................................... 11
System Inspection .................................................. 11
Changing Engine Coolant ...................................... 12
PREPARATION .......................................... 27
PREPARATION ................................................. 27
Special Service Tool ............................................... 27
Commercial Service Tool ....................................... 27
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ON-VEHICLE REPAIR ................................ 15
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RADIATOR ........................................................ 15
Removal and Installation ........................................ 15
FUNCTION DIAGNOSIS ............................. 29
OVERHEATING CAUSE ANALYSIS ................ 29
Troubleshooting Chart ............................................ 29
COOLING FAN .................................................. 17
Removal and Installation ........................................ 17
Disassembly and Assembly ................................... 17
P
COOLING SYSTEM .......................................... 31
Cooling Circuit ........................................................ 31
Schematic ............................................................... 31
WATER PUMP .................................................. 18
Removal and Installation ........................................ 18
ON-VEHICLE MAINTENANCE ................... 32
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ENGINE COOLANT .......................................... 32
System Inspection ................................................. 32
Changing Engine Coolant ...................................... 33
THERMOSTAT AND THERMOSTAT HOUS-
ING .................................................................... 44
Removal and Installation ........................................ 44
ON-VEHICLE REPAIR ............................... 36
WATER OUTLET AND WATER PIPING ......... 46
Removal and Installation ........................................ 46
RADIATOR ....................................................... 36
Removal and Installation ....................................... 36
Disassembly and Assembly of Cooling Fan .......... 38
SERVICE DATA AND SPECIFICATIONS
(SDS) .......................................................... 48
COOLING FAN ................................................. 39
Removal and Installation ....................................... 39
Disassembly and Assembly ................................... 39
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................ 48
Capacity ................................................................. 48
Thermostat ............................................................. 48
Radiator ................................................................. 48
WATER PUMP .................................................. 40
Removal and Installation ....................................... 40
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PRECAUTIONS
< PRECAUTION >
[QR25DE]
PRECAUTION
PRECAUTIONS
A
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
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INFOID:0000000001343091
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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• 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 performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• 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 har-
ness connectors.
Precaution for Liquid Gasket
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INFOID:0000000001343092
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REMOVAL OF LIQUID GASKET SEALING
• After removing nuts and bolts, separate the mating surface, using Tool and remove old liquid gasket sealing.
I
Tool number : KV10111100 (J-37228)
CAUTION:
Be careful not to damage the mating surfaces.
• Tap (1) Tool to insert it, and then slide it (2) by tapping on the side
as shown.
• 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 surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1. Remove old liquid gasket adhering to the liquid gasket applica-
tion surface and the mating surface, Using scraper.
• 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.
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WBIA0566E
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PRECAUTIONS
< PRECAUTION >
[QR25DE]
3. Attach liquid gasket tube to Tool.
Tool number : WS39930000 ( — )
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-15, "Recommended Chemical Products and Sealants" .
4. Apply liquid gasket without breaks to the specified location with
the specified dimensions.
WBIA0567E
• If there is a groove for the liquid gasket application, apply liq-
uid gasket to the groove.
• 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.
• Within five minutes of liquid gasket application, install the mat-
ing component.
• If liquid gasket protrudes, wipe it off immediately.
• Do not retighten nuts or bolts after the installation.
• After 30 minutes or more have passed from the installation, fill
engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them.
SEM159F
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PREPARATION
< PREPARATION >
[QR25DE]
PREPARATION
PREPARATION
A
Special Service Tool
INFOID:0000000001343093
CO
The actual shape of the Kent-Moore tools may differ from those tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name
Description
C
WS39930000
( —)
Tube presser
Pressing the tube of liquid gasket
D
E
S-NT052
F
EG17650301
(J-33984-A)
Radiator cap tester adapter
Adapting radiator cap tester to radiator filler
neck:
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
G
H
S-NT564
KV10111100
(J-37228)
Seal cutter
Removing chain tensioner cover and water
pump cover
I
J
NT046
K
KV991J0070
(J-45695)
Coolant Refill Tool
Refilling engine cooling system
L
M
LMA053
—
(J-23688)
Engine coolant refractometer
Checking concentration of ethylene glycol in
engine coolant
N
O
WBIA0539E
Commercial Service Tool
INFOID:0000000001343094
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CO-5
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