Infiniti G35 (V35). Manual - part 257

OVERHEATING CAUSE ANALYSIS

CO-7

C

D

E

F

G

H

I

J

K

L

M

A

CO

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

Symptom

Check items

CO-8

COOLING SYSTEM

COOLING SYSTEM

PFP:21020

Cooling Circuit

NBS000LJ

PBIC2073E

COOLING SYSTEM

CO-9

C

D

E

F

G

H

I

J

K

L

M

A

CO

System Chart

NBS000LK

PBIC0847E

CO-10

ENGINE COOLANT

ENGINE COOLANT

PFP:KQ100

Inspection

NBS000LL

LEVEL CHECK

●

Check if the reservoir tank engine coolant level is within the
“MIN” to “MAX” range when the engine is cool.

●

Adjust the engine coolant level as necessary.

LEAK CHECK

●

To check for leaks, apply pressure to the cooling system with
radiator cap tester (commercial service tool) and radiator cap
tester adapter (SST).

WARNING:

Do not remove radiator cap when engine is hot. Serious
burns could occur from high-pressure engine coolant
escaping from radiator.

CAUTION:

Higher test pressure than specified may cause radiator
damage.

NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.

●

If anything is found, repair or replace damaged parts.

Changing Engine Coolant

NBS000LM

WARNING:

●

To avoid being scalded, do not change engine coolant when engine is hot.

●

Wrap a thick cloth around radiator cap and carefully remove radiator cap. First, turn cap a quarter
of a turn to release built-up pressure. Then turn radiator cap all the way.

CAUTION:

Be careful not to allow engine coolant to contact drive belts.

DRAINING ENGINE COOLANT

1.

Remove undercover with power tool.

2.

Open radiator drain plug at the bottom of radiator, and then
remove radiator cap. 

When drain all of engine coolant in the system, open drain plugs on engine cylinder block. Refer
to 

EM-138, "DISASSEMBLY"

 .

SMA412B

Testing pressure

: 157 kPa (1.6 kg/cm

2

 , 23 psi)

SLC756A

PBIC0893E