Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2005_Q45 co

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ENGINE COOLING SYSTEM

B ENGINE

ENGINE COOLING SYSTEM
SECTION CO CO

E
CONTENTS
PRECAUTIONS ......................................................... 2. COOLING FAN ......................................................... 18
. F
Precautions for Supplemental Restraint System Removal and Installation ....................................... 18
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- REMOVAL .......................................................... 18
.
SIONER" ................................................................. 2
. INSTALLATION .................................................. 18
. G
PREPARATION .......................................................... 3
. Disassembly and Assembly ................................... 19 .
Special Service Tools .............................................. 3. DISASSEMBLY .................................................. 19
.
Commercial Service Tools ....................................... 3 . INSPECTION AFTER DISASSEMBLY ............... 19 .
H
OVERHEATING CAUSE ANALYSIS ......................... 4 . ASSEMBLY ........................................................ 19
.
Troubleshooting Chart ............................................. 4 . WATER PUMP ......................................................... 20
.
COOLING SYSTEM ................................................... 6 . Removal and Installation ....................................... 20
.
Cooling Circuit ......................................................... 6
. REMOVAL .......................................................... 20
. I
System Chart .......................................................... 7
. INSPECTION AFTER REMOVAL ...................... 20 .
ENGINE COOLANT ................................................... 8 . INSTALLATION .................................................. 20
.
Inspection ................................................................ 8
. INSPECTION AFTER INSTALLATION ............... 21 . J
CHECKING ENGINE COOLANT LEVEL ............. 8 . THERMOSTAT AND WATER CONTROL VALVE ... 22
CHECKING COOLING SYSTEM FOR LEAKS..... 8 Removal and Installation ....................................... 22
.
Changing Engine Coolant ....................................... 8 . REMOVAL .......................................................... 22
.
K
DRAINING ENGINE COOLANT .......................... 8 . INSPECTION AFTER REMOVAL ...................... 23 .
REFILLING ENGINE COOLANT ......................... 9 . INSTALLATION .................................................. 23
.
FLUSHING COOLING SYSTEM ........................ 10 . INSPECTION AFTER INSTALLATION ............... 24 .
RADIATOR ................................................................11
. SERVICE DATA AND SPECIFICATIONS (SDS) ..... 25 . L
Removal and Installation ........................................11 . Standard and Limit ................................................. 25
.
REMOVAL ...........................................................11
. CAPACITY .......................................................... 25
.
INSTALLATION .................................................. 12 . RADIATOR ......................................................... 25
. M
CHECKING RADIATOR CAP ............................. 12 . THERMOSTAT ................................................... 25
.
CHECKING RADIATOR ..................................... 13 . WATER CONTROL VALVE ................................ 25 .
RADIATOR (ALUMINUM TYPE) ............................. 14 .
Disassembly and Assembly .................................. 14 .
PREPARATION .................................................. 14 .
DISASSEMBLY .................................................. 14 .
ASSEMBLY ........................................................ 15.
INSPECTION ..................................................... 17 .

Edition; 2004 May CO-1 2005 Q45
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EBS011SX

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.

Edition; 2004 May CO-2 2005 Q45
PREPARATION

PREPARATION PFP:00002
A
Special Service Tools EBS00256

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

EG17650301 Adapting radiator cap tester to radiator cap
C
(J33984-A) and thermostat housing neck
Radiator cap tester adapter a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia. D
Unit: mm (in)

S-NT564

KV99103510 Installing radiator upper and lower tanks
E
(

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