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Infiniti I35 (A33). Manual - part 561

Overheating Cause Analysis

NHLC0029

Symptom

Check items

Cooling sys-
tem parts
malfunction

Poor heat transfer

Water pump malfunction

Worn or loose drive belt

—

Thermostat stuck closed

—

Damaged fins

Dust contamination or
paper clogging

Physical damage

Clogged radiator cooling
tube

Excess foreign material
(rust, dirt, sand, etc.)

Reduced air flow

Cooling fan does not oper-
ate

Refer to DTC P1217 in EC
section.

—

High resistance to fan rota-
tion

Fan assembly

Damaged fan blades

Damaged radiator shroud

—

Improper coolant mixture
ratio

—

Poor coolant quality

—

Coolant density

—

Insufficient coolant

Coolant leaks

Cooling hose

Loose clamp

Cracked hose

Water pump

Poor sealing

Radiator cap

Loose

Poor sealing

Radiator

O-ring for damage, deterio-
ration or improper fitting

Cracked radiator tank

Cracked radiator core

Reservoir tank

Cracked reservoir tank

Overflowing reservoir tank

Exhaust gas leaks into
cooling system

Cylinder head deterioration

Cylinder head gasket dete-
rioration

IDX

ENGINE COOLING SYSTEM

Overheating Cause Analysis

LC-25

Symptom

Check items

Except cool-
ing system
parts mal-
function

—

Overload on engine

Abusive driving

High engine rpm under no
load

Driving in low gear for
extended time

Driving at extremely high
speed

Powertrain system mal-
function

—

Installed improper size
wheels and tires

Dragging brakes

Improper ignition timing

Blocked or restricted air
flow

Blocked bumper

—

Blocked radiator grille

Installed car brassiere

Mud contamination or
paper clogging

Blocked radiator

—

Blocked condenser

Blocked air flow

Installed large fog lamp

Service Data and Specifications (SDS)

THERMOSTAT

NHLC0030

Valve opening temperature

82°C (180°F)

Valve lift

More than 8.6 mm/95°C (0.339 in/203°F)

RADIATOR

NHLC0031

Unit: kPa (kg/cm

, psi)

Cap relief pressure

Standard

78 - 98 (0.8 - 1.0, 11 - 14)

Limit

59 (0.6, 9)

Leakage test pressure

157 (1.6, 23)

ENGINE COOLING SYSTEM

Overheating Cause Analysis (Cont’d)

LC-26

MAINTENANCE

SECTION

CONTENTS

PRECAUTIONS ...............................................................2

Precautions for Supplemental Restraint System
(SRS)

......................................................2

PREPARATION ...............................................................3

Special Service Tool ....................................................3
Commercial Service Tool.............................................3

GENERAL MAINTENANCE ............................................4
PERIODIC MAINTENANCE ............................................6

Schedule 1...................................................................7

EMISSION CONTROL SYSTEM MAINTENANCE

.........7

CHASSIS AND BODY MAINTENANCE

........................8

Schedule 2...................................................................9

EMISSION CONTROL SYSTEM MAINTENANCE

.........9

CHASSIS AND BODY MAINTENANCE

......................10

Fluids and Lubricants ................................................ 11
SAE Viscosity Number .............................................. 11

GASOLINE ENGINE OIL

.......................................... 11

Anti-freeze Coolant Mixture Ratio .............................12

ENGINE MAINTENANCE ..............................................13

Checking Drive Belts .................................................13
Changing Engine Coolant..........................................14

- DRAINING ENGINE COOLANT -

............................14

- REFILLING ENGINE COOLANT -

...........................14

- FLUSHING COOLING SYSTEM -

............................15

Checking Fuel Lines ..................................................15
Changing Air Cleaner Filter .......................................16

VISCOUS PAPER TYPE

...........................................16

Changing Engine Oil..................................................16
Changing Oil Filter.....................................................17

Changing Spark Plugs...............................................17
Checking EVAP Vapor Lines .....................................19

CHASSIS AND BODY MAINTENANCE .......................20

Checking Exhaust System.........................................20
Checking A/T Fluid ....................................................20
Changing A/T Fluid ....................................................21
Balancing Wheels (Bonding Weight Type) ................21

REMOVAL

...............................................................21

WHEEL BALANCE ADJUSTMENT

............................21

Tire Rotation ..............................................................23
Checking Brake Fluid Level and Leaks.....................23
Checking Brake Lines and Cables ............................23
Checking Disc Brake .................................................23

ROTOR

...................................................................23

CALIPER

.................................................................24

PAD

........................................................................24

Checking Steering Gear and Linkage .......................24

STEERING GEAR

....................................................24

STEERING LINKAGE

...............................................24

Checking Power Steering Fluid and Lines ................24
Axle and Suspension Parts .......................................25
Drive Shaft .................................................................25
Lubricating Locks, Hinges and Hood Latches...........25
Checking Seat Belts, Buckles, Retractors,
Anchors and Adjusters...............................................26

SERVICE DATA AND SPECIFICATIONS (SDS) .........27

Engine Maintenance ..................................................27

BELT DEFLECTION AND TENSION

..........................27

SPARK PLUG

..........................................................27

Chassis and Body Maintenance................................27

WHEEL BALANCE

...................................................27

IDX

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

NHMA0034

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 sys-
tem 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 that is necessary to service the system safely is included in the RS section of this Service Manual.

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 per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS 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
harness connectors.

PRECAUTIONS

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

MA-2

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