Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2003_Q45 co

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ENGINE COOLING SYSTEM

B ENGINE

CO
SECTION
ENGINE COOLING SYSTEM C

E
CONTENTS
PRECAUTIONS ......................................................... 2. RADIATOR (ALUMINUM TYPE) .............................. 14 . F
Precautions for Supplemental Restraint System Disassembly and Assembly ................................... 14 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- PREPARATION .................................................. 14
.
SIONER" ................................................................. 2
. DISASSEMBLY .................................................. 14
. G
Precautions for Liquid Gasket ................................. 2 . ASSEMBLY ........................................................ 15
.
REMOVAL OF LIQUID GASKET SEALING ......... 2 . INSPECTION ..................................................... 17
.
LIQUID GASKET APPLICATION PROCEDURE 2 ..... COOLING FAN ......................................................... 18
.
H
PREPARATION .......................................................... 4
. Removal and Installation ....................................... 18
.
Special Service Tools .............................................. 4. REMOVAL .......................................................... 18
.
Commercial Service Tools ....................................... 4 . INSPECTION AFTER REMOVAL ...................... 19 .
OVERHEATING CAUSE ANALYSIS ......................... 5 . INSTALLATION .................................................. 19
. I
Troubleshooting Chart ............................................. 5 . INSPECTION AFTER INSTALLATION ............... 20 .
COOLING SYSTEM ................................................... 7 . Disassembly and Assembly ................................... 20 .
Cooling Circuit ......................................................... 7
. DISASSEMBLY .................................................. 20
. J
System Drawing ...................................................... 8
. ASSEMBLY ........................................................ 21
.
ENGINE COOLANT ................................................... 9 . WATER PUMP ......................................................... 22
.
Inspection ................................................................ 9
. Removal and Installation ....................................... 22
.
K
LEVEL CHECK .................................................... 9 . REMOVAL .......................................................... 22
.
LEAK CHECK ...................................................... 9 . INSPECTION AFTER REMOVAL ...................... 23 .
Changing Engine Coolant ....................................... 9 . INSTALLATION .................................................. 23
.
DRAINING ENGINE COOLANT .......................... 9 . INSPECTION AFTER INSTALLATION ............... 23 . L
REFILLING ENGINE COOLANT ....................... 10 . THERMOSTAT AND WATER CONTROL VALVE ... 24
FLUSHING COOLING SYSTEM .........................11 . Removal and Installation ....................................... 24
.
RADIATOR ............................................................... 12
. REMOVAL .......................................................... 24
. M
Removal and Installation ....................................... 12 . INSPECTION AFTER REMOVAL ...................... 25 .
REMOVAL .......................................................... 12
. INSTALLATION .................................................. 25
.
INSTALLATION .................................................. 13 . SERVICE DATA AND SPECIFICATIONS (SDS) ..... 26 .
CHECKING RADIATOR CAP ............................. 13 . Standard and Limit ................................................. 26
.
CHECKING RADIATOR ..................................... 13 . CAPACITY .......................................................... 26
.
THERMOSTAT ................................................... 26
.
WATER CONTROL VALVE ................................ 26 .
RADIATOR ......................................................... 26
.
Tightening Torque .................................................. 26
.

Revision; 2004 April CO-1 2003 Q45
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EBS00LUD

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 Liquid Gasket EBS0024Y

REMOVAL OF LIQUID GASKET SEALING
q After removing the mounting bolts and nuts, separate the mating
surface using a seal cutter and remove the old 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 area 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
surfaces. 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
liquid gasket application surface, mounting bolts, and bolt
holes.
2. Wipe the liquid gasket application surface and the mating sur-
face with white gasoline (lighting and heating use) to remove
adhering moisture, grease and foreign materials.
3. Attach the liquid gasket tube to the tube presser.
Use Genuine Thread Sealant or equivalent. Refer to GI-46,
"RECOMMENDED CHEMICAL PRODUCTS AND SEAL- PBIC0003E

ANTS" .

Revision; 2004 April CO-2 2003 Q45
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
liquid 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 service manual. E
q Within five minutes of liquid gasket application, install the mat-
ing 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, 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 Q45
PREPARATION

PREPARATION PFP:00002

Special Service Tools EBS00256

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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