2010 Lexus GX460 engine

5
When trouble arises
745
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
After the engine has cooled
down sufficiently, check the
coolant level and inspect the
radiator core (radiator) for any
leaks.
Add engine coolant if required.
Water can be used as an emer-
gency measure if engine coolant
is unavailable. (P. 7 5 5 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP5
STEP6

746
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
■Overheating
In the following situations, your vehicle may be overheating:
●The engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
●Steam is coming from under the hood.
CAUTION
■To prevent an accident or injury when in specting under the hood of your vehicle
●If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartm ent may be very hot, causing serious
injury such as burns.
●Keep hands and clothing away from the fan and engine drive belt while the
engine is running.
●Do not loosen the coolant reservoir cap while the engine and radiator are hot.
Serious injury, such as burns, may resu lt from hot coolant and steam released
under pressure.
NOTICE
■When adding engine coolant
Wait until the engine has cooled down before adding coolant.
When adding coolant, do so slowly. Adding cold coolant to a hot engine too quickly
can cause damage to the engine.

5
When trouble arises
747
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
If the vehicle becomes stuck
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt, or snow:
Stop the engine. Set the parking brake and shift the shift lever
to P.
Remove the mud, snow, or sand from around the stuck tire.
Place wood, stones or some ot her material to help provide
traction under the tires.
Restart the engine.
Lock the center differential. (  P. 318)
Release the parking brake and shif t the shift lever to the D or R
position and carefully apply the accelerator to free the vehicle.
Turn off TRAC and VSC if these functions are hampering your
attempts to free the vehicle. (P. 3 3 3 )
STEP1
STEP2
STEP3
STEP4
STEP5
STEP6

748
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
CAUTION
■When attempting to free a stuck vehicle
If you choose to push 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.
■When shifting the shift lever
Be careful not to shift the shift lever with the accelerator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle that may cause an
accident and result in death or serious injury.
NOTICE
■To avoid damaging the transm ission and other components
●Avoid spinning the wheels and rev the engine.
●If the vehicle remains stuck even after trying these procedures, the vehicle may
require towing to be freed.

752
6-1. Specifications
GX460_U.S.A. (OM60E69U)■
Engine number
The engine number is stamped on the engine block as shown.
Engine
Fuel
Model1UR-FE
Ty p e8-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70  3.27 in. (94.0  83.0 mm)
Displacement281.2 cu.in. (4608 cm3)
Drive belt tensionAutomatic adjustment
Fuel typePremium unleaded gasoline only
Octane rating91 (Research Octane Number 96) or higher
Fuel tank capacity23.0 gal. (87 L, 19.1 Imp.gal)

753
6-1. Specifications
6
Vehicle specifications
GX460_U.S.A. (OM60E69U)
Lubrication system■ Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use Lexus
approved “Toyota Genuine Motor Oil” or equivalent to satisfy the follow-
ing grade and viscosity.
Oil grade: ILSAC multigrade engine oil
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good
starting in cold weather.
If SAE 0W-20 is not available,
SAE 5W-20 oil may be used.
However, it must be replaced with
SAE 0W-20 at the next oil
change.
Oil capacity 
Drain and refill 
(Reference)
With filter
Without filter

8.2 qt. (7.8 L, 6.9 Imp.qt.)
7.8 qt. (7.4 L, 6.5 Imp.qt.)
Outside temperature

754
6-1. Specifications
GX460_U.S.A. (OM60E69U)
The 0W portion of the oil viscosity rating indicates the characteristic of the oil
which allows cold startability. Oils with a lower value before the W allow for
easier starting of the engine in cold weather.
The 20 in 0W-20 indicates the oil viscosity when the oil is at its operating
temperature. An oil with a higher viscosity may be better suited if the vehicle
is operated at high speeds, or under extreme load conditions.
How to read oil container label:
The ILSAC (International Lubricant St andardization and Approval Com-
mittee) Certification Mark is added to some oil containers to help you
select the oil you should use.

756
6-1. Specifications
GX460_U.S.A. (OM60E69U)
Electrical system
Front differential
*: “Toyota Genuine Differential Gear Oil” is filled in your Lexus vehicle at factory fill. 
Use Lexus approved “Toyota Genuine Differential Gear Oil” or an equivalent of
matching quality to satisfy the above specification. Please contact your Lexus
dealer for further details.
Battery
Open voltage* at 
68 F (20 C):12.6  12.8 V Fully charged 
12.2  12.4 V Half charged
11.8  12.0 V Discharged 
(
*: Voltage is checked 20 minutes after the
engine and all the lights are turned off.)
Charging rates5A max.
Oil capacity1.48 qt. (1.40 L, 1.23 Imp.qt.)
Oil type and viscosity*Toyota Genuine Differential 
Gear Oil LT 75W-85 GL5 or equivalent