Infiniti M35/M45 Y50. Manual - part 348

SERVICE DATA AND SPECIFICATIONS (SDS)

CO-33

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

CO

SERVICE DATA AND SPECIFICATIONS (SDS)

PFP:00100

Standard and Limit

NBS004R7

ENGINE COOLANT CAPACITY (APPROXIMATE)

Unit: 

 (US qt, Imp qt)

RADIATOR

Unit: kPa (kg/cm

2

 , psi)

THERMOSTAT

Engine coolant capacity [With reservoir tank (“MAX” level)]

8.9 (9-3/8, 7- 7/8)

Reservoir tank engine coolant capacity (At “MAX” level)

0.8 (7/8, 3/4)

Radiator cap relief pressure

Standard

78 - 98 (0.8 - 1.0, 11 - 14)

Limit

59 (0.6, 9)

Leakage testing pressure

157 (1.6, 23)

Thermostat

Standard 

Valve opening temperature

82

°

C (180

°

F)

Maximum valve lift

8.6 mm/95

°

C (0.339 in/203

°

F)

Valve closing temperature

77

°

C (171

°

F)

CO-34

[VK45DE]

PRECAUTIONS

[VK45DE]

PRECAUTIONS

PFP:00001

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

NBS004R8

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:

●

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.

●

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.

●

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.

PREPARATION

CO-35

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

CO

PREPARATION

PFP:00002

Special Service Tools

NBS004R9

The actual shapes of Kent-Moore tools may from those of special service tools illustrated here.

Commercial Service Tools

NBS004RA

Tool number
(Kent-Moore No.)
Tool name

Description

KV99103510
(

—

)

Radiator plate pliers A

Installing radiator upper and lower tanks

KV99103520
(

—

)

Radiator plate pliers B

Removing radiator upper and lower tanks

S-NT224

S-NT225

Tool name

Description

Power tool

Loosening nuts and bolts

Radiator cap tester

Checking radiator and radiator cap

Radiator cap tester adapter

Adapting radiator cap tester to radiator cap 
and thermostat housing filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)

PBIC0190E

PBIC1982E

S-NT564

CO-36

[VK45DE]

OVERHEATING CAUSE ANALYSIS

OVERHEATING CAUSE ANALYSIS

PFP:00012

Troubleshooting Chart

NBS004RB

Symptom

Check items

Cooling sys-
tem parts 
malfunction

Poor heat transfer

Water pump malfunction

Worn or loose drive belt

—

Thermostat and water con-
trol valve 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

Fan assembly

—

High resistance to fan rota-
tion

Damaged fan blades

Damaged radiator shroud

—

—

—

Improper engine coolant 
mixture ratio

—

—

—

Poor engine coolant quality

—

Engine coolant density

—

Insufficient engine coolant

Engine 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