2006 LEXUS LS430 engine

5
When trouble arises
359
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats
Stop the vehicle in a safe place and turn off the automatic climate
control.
Check to see if steam is coming out from under the hood.
If you see steam: 
Stop the engine.
If you do not see steam: 
Leave the engine running and carefully lift the hood.
Check to see if the cooling fan is operating.
If the fan is operating: 
Wait until the temperature of the engine (shown in the instrument clus -
ter) begins to fall and then stop the engine.
If the fan is not operating: 
Stop the engine and call your local Lexus dealer.
After the engine has cooled down
sufficiently, check the level of
engine coolant and inspect the
radiator core (radiator) for any
leaks.

360
5-2. Steps to take in an emergency
■Overheating
If you observe the following, your vehicle may be overheating.
• The engine coolant temperatur
e gauge enters the red zone or a loss of power is
experienced.
• Steam is coming out from under the hood.
CAUTION
■To prevent an accident or injury when in specting under the hood of your vehicle
●Keep hands and clothing away from the fan and other belts while the engine is
running.
●Do not loosen the radiator cap while the engine and radiator are hot. 
Serious injury could result from scalding hot fluid and steam blown out under
pr
essure.
NOTICE
■When adding engine coolant
Wait until the engine has cooled do wn befor
e adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too quickly
ca
n cause damage to the engine.
Add engine coolant if required.
Water can be used as an emer -
gency measure if engine coolant is
una
vailable.( P.367 )

5
When trouble arises
361
5-2. Steps to take in an emergency
If the vehicle becomes stuck
CAUTION
■When removing the stuck vehicle
If you choose to rock the vehicle back and forth to free it, make sure the surround-
ing area is clear, to avoid striking other vehicles, objects or persons. The vehicle
may
also lunge forward or lunge back suddenly as it becomes free, use extreme
caution.
NOTICE
■To avoid damaging the transmission and other components
●Do not operate the selector lever while depressing the accelerator pedal.
●Avoid spinning the wheels and do not rev the engine.
●If the vehicle remains stuck after trying these procedures the vehicle may require
towing to be freed.
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt, or snow to the extent that it cannot move.
• Stop the engine. Set the parking brake and put the transmission
selector lever in “P”.
• Remove the mud, snow, or sand from around the stuck tire.
• Place wood, stones or some other ma terial to help pr
ovide traction
under the tires.
• Restart the engine.
• Turn off the traction control system. ( P.141)
• Carefully apply the accelerator to free the vehicle.

365
6-1. Specifications
6
Vehicle specifications
Vehicle identification
The vehicle identification number (VIN) is the legal identifier for your
vehicle. This is the primar y identification number for your Lexus. It is used
in registering the ownership of your vehicle.
This number is stamped on the top
lef
t of the instrument panel.
This number is also on the Certifi-
cation Label.
Engine
Model3UZ-FE
Ty p e8 cylinder V type, 4 cycle, gasoline
Bore and stroke3.58  3.25 in. (91.0  82.5 mm)
Displacement261.9 cu.in. (4293 cm3)
Valve clearance 
(engine cold) 
Intake exhaust
0.006 - 0.010 in. (0.15 - 0.25 mm) 
0.010 - 0.014 in. (0.25 - 0.35 mm)
Drive belt tensionAutomatic adjustment

366
6-1. Specifications
Fuel
Lubrication system
*5W-30 is an oil that provides optimal levels of fuel efficiency
Oil viscosity
• “5W” oils are for use in ar
eas where the ambient temperature is -13 F (-
25 C) or above. “10W” oils are fo r areas where the ambient tempera -
ture is -4 F (-
20C) or above. Oils with smaller figures are better for
engine starting in cold we ather and fuel efficiency.
• “XX-30” indicates oil viscosity. O ils with lar
ger figures have better ther-
mostability and are good for high-speed driving.
Fuel typeUnleaded gasoline only
Octane rating91 (Research octane number 96) or higher
Fuel tank capacity22.2 gal. (84 L, 18.5 lmp.gal)
Oil capacity
(drain and refill) with filter
without filter
5.4 qt. (5.1 L, 4.5 lmp.qt.)
4.8 qt. (4.5 L, 4.0 lmp.qt.)
Oil gradeILSAC multigrade engine oil
Recommended oil 
viscosity
Use Lexus approved “Toyota Genuine
Motor Oil” or equivalent to satisfy the
above grade and viscosity.
Temperature range anticipated before
next oil change 5W-30*

367
6-1. Specifications
6
Vehicle specifications
Cooling system
Ignition system
Capacity10.0 qt. (9.5 L, 8.4 lmp.qt.)
Coolant type
Use either of the following.
• “Toyota Super Long Life Coolant”
• Similar high quality ethylene glycol based non-silicat
e, non-amine, non-nitrite, and
non-borate coolant with long-life hybrid
organic acid technology
Do not use plain water alone.
Spark plug
-MakeDENSOSK20R11
NGKIFR6A11
- Gap0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not
adjust gap when tuning engine.

369
6-1. Specifications
6
Vehicle specifications
Automatic Transmission
Brakes
* Minimum pedal clearance when depressed with the force of 44 lbf. (196 N, 20 kgf ) with the engine running
** Parking brake adjustment when depressed with the for
ce of 66.1 lbf. (294 N, 30
kgf )
Steering
Fluid capacity 
Drain and refill1.8 qt. (1.7 L, 1.5 lmp.qt.)
Fluid typeToyota Genuine ATF WS 
(ATF JWS3324 or NWS9638)
Pedal clearance *2.8 in. (70 mm) Min.
Pedal free play0.04 - 0.24 in. (1 - 6 mm)
Brake pad wear limit0.04 in. (1.0 mm)
Parking brake lining wear limit0.04 in. (1.0 mm)
Parking brake adjustment **5 - 7 clicks
Fluid typeSAE J1703 or FMVSS No. 116 DOT 3
Free playLess than 1.2 in. (30 mm)
Power steering fluidAutomatic transmission fluid DEXRONII or
III

373
6-1. Specifications
6
Vehicle specifications
Fuel information
■Fuel tank opening for unleaded gasoline
●To help prevent incorrect fueling, your Lexus has a fuel tank opening that will
only accept the special nozzle on unleaded fuel pumps.
●If premium fuel is not available, you may temporarily use unleaded gasoline with
an Octane Rating as low as 87 (Research Octane Number 91).
■If your engine knocks ...
●Consult your Lexus dealer.
●You may occasionally notice light knocking for a short time while accelerating
or driving up hills. This is normal and there is no need for concern.
■Gasoline quality
In very few cases, driveability problems may be caused by the brand of gasoline you
ar

e using. If driveability problems persist, try changing the brand of gasoline. If this
does not correct the problem, consult your Lexus dealer.
■Gasoline quality standards
●Automotive manufacturers in the US, Europe and Japan have developed a
specification for fuel quality called World-Wide Fuel Charter (WWFC) that is
expected to be applied worldwide.
●The WWFC consists of four categories that are based on required emission
levels. In the US, category 3 has been adopted.
●The WWFC improves air quality by lowering emissions in vehicle fleets, and
customer satisfaction through better vehicle performance.
Your vehicle must use on ly unleaded gasoline. 
Select premium unleaded gasoline with an
Octane Rating of 91 (Research
Octane Number 96) or higher for optimum engine performance.
At minimum, the gasoline you use sh ould meet the specifications of
ASTM D4814 in the USA and CGSB 3.5-M93 in Canada.