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ENGINE COOLING SYSTEM

B ENGINE

ENGINE COOLING SYSTEM
SECTION CO CO

E
CONTENTS
VQ35DE RADIATOR (ALUMINUM TYPE) .............................. 17 . F
Disassembly and Assembly ................................... 17 .
PRECAUTIONS ......................................................... 3. PREPARATION .................................................. 17 .
Precautions for Supplemental Restraint System DISASSEMBLY .................................................. 17 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- ASSEMBLY ........................................................ 18.
SIONER" ................................................................. 3
. INSPECTION ..................................................... 20 .
Precautions for Liquid Gasket ................................. 3 . WATER PUMP ......................................................... 21.
REMOVAL OF LIQUID GASKET SEALING ......... 3 . H
Removal and Installation ....................................... 21 .
LIQUID GASKET APPLICATION PROCEDURE 3 ..... REMOVAL .......................................................... 21
.
PREPARATION .......................................................... 5
. INSPECTION AFTER REMOVAL ...................... 23 .
Special Service Tools .............................................. 5. INSTALLATION .................................................. 23 . I
Commercial Service Tools ....................................... 6 . INSPECTION AFTER INSTALLATION ............... 24 .
OVERHEATING CAUSE ANALYSIS ......................... 7 . WATER INLET AND THERMOSTAT ASSEMBLY ... 25
Troubleshooting Chart ............................................. 7 . Removal and Installation ....................................... 25 . J
COOLING SYSTEM ................................................... 9 . REMOVAL .......................................................... 25
.
Cooling Circuit ......................................................... 9
. INSPECTION AFTER REMOVAL ...................... 26 .
System Drawing .................................................... 10. INSTALLATION .................................................. 26 .
ENGINE COOLANT ..................................................11 . K
INSPECTION AFTER INSTALLATION ............... 26 .
Inspection ...............................................................11
. WATER OUTLET AND WATER PIPING .................. 27 .
LEVEL CHECK ...................................................11 . Removal and Installation ....................................... 27 .
CHECKING COOLING SYSTEM FOR LEAKS....11 REMOVAL .......................................................... 27
. L
Changing Engine Coolant ......................................11 . INSTALLATION .................................................. 27 .
DRAINING ENGINE COOLANT .........................11 . INSPECTION AFTER INSTALLATION ............... 27 .
REFILLING ENGINE COOLANT ....................... 12 . SERVICE DATA AND SPECIFICATIONS (SDS) ..... 28 . M
FLUSHING COOLING SYSTEM ........................ 13 . Standard and Limit ................................................. 28
.
RADIATOR ............................................................... 14
. ENGINE COOLANT CAPACITY (APPROXI-
Removal and Installation ....................................... 14 . MATE) ................................................................. 28
.
REMOVAL .......................................................... 14
. THERMOSTAT ................................................... 28 .
INSTALLATION .................................................. 15 . RADIATOR ......................................................... 28
.
INSPECTION AFTER INSTALLATION .............. 15 .
Checking Radiator Cap ......................................... 15 .
Checking Radiator ................................................. 16.
VK45DE
Removal and Installation of Cooling Fan .............. 16 . PRECAUTIONS ....................................................... 29.
REMOVAL .......................................................... 16
. Precautions for Supplemental Restraint System
INSTALLATION .................................................. 16 . (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
Disassembly and Assembly of Cooling Fan .......... 16 . SIONER" ................................................................ 29
.
DISASSEMBLY .................................................. 16 . PREPARATION ........................................................ 30
.
ASSEMBLY ........................................................ 16. Special Service Tools ............................................ 30.
Commercial Service Tools ..................................... 30 .

Revision; 2004 April CO-1 2003 FX
OVERHEATING CAUSE ANALYSIS ....................... 31 . INSPECTION AFTER REMOVAL .......................45 .
Troubleshooting Chart ........................................... 31 . INSTALLATION ...................................................45 .
COOLING SYSTEM ................................................. 33 . INSPECTION AFTER INSTALLATION ...............45 .
Cooling Circuit ....................................................... 33
. Removal and Installation (Motor Driven Type) .......46 .
System Drawing .................................................... 34. REMOVAL ...........................................................46
.
ENGINE COOLANT ................................................. 35 . INSTALLATION ...................................................46 .
Inspection .............................................................. 35
. DISASSEMBLY AND ASSEMBLY ......................46 .
LEVEL CHECK ................................................... 35 . DISASSEMBLY ...................................................46 .
CHECKING COOLING SYSTEM FOR LEAKS ... 35 ASSEMBLY .........................................................46.
Changing Engine Coolant ...................................... 35 . WATER PUMP ..........................................................47.
DRAINING ENGINE COOLANT ......................... 35 . Removal and Installation ........................................47 .
REFILLING ENGINE COOLANT ........................ 36 . REMOVAL ...........................................................47
.
FLUSHING COOLING SYSTEM ........................ 37 . INSPECTION AFTER REMOVAL .......................47 .
RADIATOR ............................................................... 38
. INSTALLATION ...................................................48 .
Removal and Installation ....................................... 38 . INSPECTION AFTER INSTALLATION ...............48 .
REMOVAL .......................................................... 38
. THERMOSTAT AND WATER CONTROL VALVE ....49 .
INSTALLATION ................................................... 40 . Removal and Installation ........................................49 .
INSPECTION AFTER INSTALLATION ............... 40 . REMOVAL ...........................................................49
.
Checking Radiator Cap ......................................... 40 . INSPECTION AFTER REMOVAL .......................50 .
Checking Radiator ................................................. 40. INSTALLATION ...................................................50 .
RADIATOR (ALUMINUM TYPE) .............................. 41 . INSPECTION AFTER INSTALLATION ...............51 .
Disassembly and Assembly ................................... 41 . SERVICE DATA AND SPECIFICATIONS (SDS) .....52 .
PREPARATION .................................................. 41 . Standard and Limit .................................................52.
DISASSEMBLY .................................................. 41 . ENGINE COOLANT CAPACITY (APPROXI-
ASSEMBLY ........................................................ 42. MATE) .................................................................52
.
INSPECTION ...................................................... 44. THERMOSTAT ....................................................52 .
COOLING FAN ......................................................... 45
. WATER CONTROL VALVE .................................52 .
Removal and Installation (Crankshaft Driven Type) 45 ... RADIATOR ..........................................................52
.
REMOVAL .......................................................... 45
.

Revision; 2004 April CO-2 2003 FX
PRECAUTIONS
[VQ35DE]
PRECAUTIONS
[VQ35DE] PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" ABS00952

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along CO
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 C
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: D
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. E
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. F
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.
G
Precautions for Liquid Gasket ABS005ZR

REMOVAL OF LIQUID GASKET SEALING
q After removing the mounting bolts and nuts, separate the mating H
surface using a seal cutter (SST) and remove the old liquid gas-
ket sealing.
CAUTION: I
Be careful not to damage the mating surfaces.
q Tap seal cutter to insert it, and then slide it by tapping on the
side as shown in the figure. J
q In areas where seal cutter is difficult to use, use plastic hammer
to lightly tap the areas where the liquid gasket is applied.
CAUTION: PBIC0002E K
If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE L
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 M
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.

PBIC0003E

Revision; 2004 April CO-3 2003 FX
PRECAUTIONS
[VQ35DE]
3. Attach the liquid gasket tube to tube presser [SST: WS39930000
(

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