2006 Lexus GS430 Spark plug

cm2
Maintenance procedures for the engine, chassis,
body, electrical system, and more, are clearly
explained and illustrated.
Periodic maintenance and tuneup
Periodic maintenance and tuneup helps to prevent small
problems from growing into larger ones later on. The repair
manual outlines exactly what maintenance is required and
clearly explains how to do the work yourself stepbystep.
Areas covered include such things as spark plug replacement,
valve clearance adjustment and engine oil and filter
replacement.
Where to obtain the Repair Manual
The repair manual for GS430, GS300 may be purchased from
any Lexus dealer or call the Material Distribution Center. To
purchase the repair manual, please contact your Lexus dealer
or the Material Distribution Center tollfree at
18006222033.

SECTION 6 – 2
519
SERVICE PROCEDURES AND
SPECIFICATIONS
Engine
Specifications (GS430)520
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications (GS300) 523
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 526
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . . . . .
Fuel pump shut off system 528
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Facts about engine oil consumption 528
. . . . . . . . . . . . . . . . . . . . . . . .
Used engine oil 530
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
Checking the engine oil level 530
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the engine coolant level 534
. . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the radiator and condenser 536
. . . . . . . . . . . . . . . . . . . . . . .
Spark plugs 537
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . .

ENGINE
522– COOLING SYSTEM
Capacity
10.1 L (10.7 qt., 8.9 lmp.qt.)
Coolant type”Toyota Super Long Life Coolant” or similar high quality ethylene glyco\
l
based non −silicate, non− amine, non−nitrite, and non −borate coolant
with long −life hybrid organic acid technology (Coolant with long −life
hybrid organic acid technology is a combination of low phosphates and
organic acids.)
Do not use plain water alone.
NOTE:
“Toyota Super Long Life Coolant” is used in your Lexus vehicle at factory fil\
l. In order to avoid technical problems, only use ”Toyota
Super Long Life Coolant” or similar high quality ethylene glycol based non −silicate, non −amine, non −nitrite, and non −borate coolant
with long−life hybrid organic acid technology. (Coolant with long −life hybrid organic acid technology is a combination of low
phosphates and organic acids.) Do not use plain water alone. Please contact you\
r Lexus dealer for further details.
– IGNITION SYSTEM
Spark plug – Make DENSO NGK
– Gap
SK20R11
IFR6A11
1.1 mm (0.043 in.)
– ELECTRICAL SYSTEM
Battery – Open voltage at 20 C (68F):
– Charging rates
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the engine switch is off with all
the lights turned off]
5A max.

ENGINE
525
– COOLING SYSTEM
Capacity
9.1 L (9.6 qt., 8.0 lmp.qt.)
Coolant type”Toyota Super Long Life Coolant” or similar high quality ethylene glyco\
l
based non −silicate, non− amine, non−nitrite, and non −borate coolant
with long −life hybrid organic acid technology (Coolant with long −life
hybrid organic acid technology is a combination of low phosphates and
organic acids.)
Do not use plain water alone.
NOTE:
“Toyota Super Long Life Coolant” is used in your Lexus vehicle at factory fil\
l. In order to avoid technical problems, only use ”Toyota
Super Long Life Coolant” or similar high quality ethylene glycol based non −silicate, non −amine, non −nitrite, and non −borate coolant
with long−life hybrid organic acid technology. (Coolant with long −life hybrid organic acid technology is a combination of low
phosphates and organic acids.) Do not use plain water alone. Please contact you\
r Lexus dealer for further details.
– IGNITION SYSTEM
Spark plug – Make DENSO NGK
– Gap
FK20HBR11
ILFR6D11T
1.1 mm (0.043 in.)
– ELECTRICAL SYSTEM
Battery – Open voltage at 20 C (68F):
– Charging rates
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the engine switch is off with all
the lights turned off]
5A max.

ENGINE
537
SPARK PLUGS
62R031c
GS430
Your engine is fitted with iridiumtipped spark plugs.
NOTICE
Use only iridiumtipped spark plugs. Do not adjust
gaps for engine performance or smooth drivability.
G62009a
 GS300
Your engine is fitted with the designated iridiumtipped
spark plugs.
NOTICE
Use the designated iridiumtipped spark plugs only. Do
not adjust gaps for engine performance or smooth
drivability.