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ENGINE COOLING SYSTEM

B ENGINE

ENGINE COOLING SYSTEM
SECTION CO CO

E
CONTENTS
PRECAUTIONS ......................................................... 2. INSTALLATION .................................................. 13 . F
Precautions for Supplemental Restraint System Disassembly and Assembly of Cooling Fan .......... 14 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- DISASSEMBLY .................................................. 14 .
SIONER" ................................................................. 2
. ASSEMBLY ........................................................ 14 . G
Precautions for Battery Service ............................... 2 . CHECKING RADIATOR CAP ............................. 14 .
Precautions for Liquid Gasket ................................. 2 . CHECKING RADIATOR ..................................... 15 .
REMOVAL OF LIQUID GASKET SEALING ......... 2 . RADIATOR (ALUMINUM TYPE) .............................. 16 .
H
LIQUID GASKET APPLICATION PROCEDURE 2 ..... Disassembly and Assembly ................................... 16 .
PREPARATION .......................................................... 4
. PREPARATION .................................................. 16 .
Special Service Tools .............................................. 4. DISASSEMBLY .................................................. 16 .
Commercial Service Tools ....................................... 5 . ASSEMBLY ........................................................ 17 . I
OVERHEATING CAUSE ANALYSIS ......................... 6 . INSPECTION ..................................................... 19 .
Troubleshooting Chart ............................................. 6 . WATER PUMP ......................................................... 20 .
COOLING SYSTEM ................................................... 8 . Removal and Installation ....................................... 20 . J
Cooling Circuit ......................................................... 8
. REMOVAL .......................................................... 20.
ENGINE COOLANT ................................................... 9 . INSPECTION AFTER REMOVAL ...................... 22 .
Inspection ................................................................ 9
. INSTALLATION .................................................. 22 .
K
LEVEL CHECK .................................................... 9 . THERMOSTAT AND THERMOSTAT HOUSING ..... 24 .
LEAK CHECK ...................................................... 9 . Removal and Installation ....................................... 24 .
Changing Engine Coolant ....................................... 9 . REMOVAL .......................................................... 24.
DRAINING ENGINE COOLANT .......................... 9 . INSPECTION AFTER REMOVAL ...................... 24 . L
REFILLING ENGINE COOLANT ....................... 10 . INSTALLATION .................................................. 25 .
FLUSHING COOLING SYSTEM .........................11 . WATER OUTLET AND WATER PIPING .................. 26 .
RADIATOR ............................................................... 12
. Removal and Installation ....................................... 26 . M
Removal and Installation ....................................... 12 . REMOVAL .......................................................... 26.
REMOVAL .......................................................... 12
. INSTALLATION .................................................. 26 .
SERVICE DATA AND SPECIFICATIONS (SDS) ..... 27 .
Capacity ................................................................. 27
.
Thermostat ............................................................ 27
.
Radiator ................................................................. 27
.
Tightening Torque .................................................. 27.

Revision; 2004 April CO-1 2003 G35 Coupe
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" ABS00B4C

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 SRS and SB section of this Service Man-
ual.
WARNING:
q 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.
q 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.
q 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 Battery Service ABS00B4D

Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Precautions for Liquid Gasket ABS004SN

REMOVAL OF LIQUID GASKET SEALING
q After removing the mounting bolts and nuts, separate the mating
surface using a seal cutter and remove the liquid gasket sealing.
CAUTION:
Be careful not to damage the mating surfaces.
q In areas where the cutter is difficult to use, use a plastic hammer
to lightly tap the areas where the liquid gasket is applied.
CAUTION:
If for some unavoidable reason a tool such as a flat-bladed
screwdriver is used, be careful not to damage the mating sur-
faces.
PBIC0002E

LIQUID GASKET APPLICATION PROCEDURE
1. Using a scraper, remove the old liquid gasket adhering to the liq-
uid gasket application surface and the mating surface.
q Remove the liquid gasket completely from the groove of the liq-
uid gasket application surface, mounting bolts, and bolt holes.
2. Wipe the liquid gasket application surface and the mating sur-
face removing any adhering moisture, grease and foreign mate-
rial.
3. Attach the liquid gasket tube to the tube presser.
q Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-47, "RECOMMENDED CHEMICAL PRODUCTS AND PBIC0003E
SEALANTS" .

Revision; 2004 April CO-2 2003 G35 Coupe
PRECAUTIONS

4. Apply the liquid gasket without breaks to the specified location
with the specified dimensions. A
q If there is a groove for the liquid gasket application, apply the liq-
uid gasket to the groove.
CO

EMA0622D

D
q As for the bolt holes, normally apply the liquid gasket inside the
holes. Occasionally, it should be applied outside the holes. Make
sure to read the text of this manual. E
q Within five minutes of liquid gasket application, install the mating
component.
q If the liquid gasket protrudes, wipe it off immediately. F
q Do not retighten after the installation.
q After 30 minutes or more have passed. from the installation,
before fill the engine oil and engine coolant. G
CAUTION: SEM159F
If there are specific instructions in this manual, observe them.
H

Revision; 2004 April CO-3 2003 G35 Coupe
PREPARATION

PREPARATION PFP:00002

Special Service Tools ABS002XO

The actual shapes of Kent-Moore tools may from those of special service tools illustrated here.
Tool number
(Kent-Moore No.) Description
Tool name

WS39930000 Pressing the tube of liquid gasket
(

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