engine Lexus GX470 2004 Audio /

ENGINE
565
Engine oil selection
Toyota Genuine Motor Oilº is used in your Lexus vehicle. Use
Lexus approved Toyota Genuine Motor Oilº or equivalent to
satisfy the following grade and viscosity.
Oil grade: API grade SL Energy-Conservingº or ILSAC
multigrade engine oil.
Recommended viscosity: SAE 5W-30
62Z002
Outside temperature
SAE 5W-30 is the best choice, for good fuel economy and
good starting in cold weather.
If SAE 5W-30 oil is not available, SAE 10W-30 may be
used. However, it should be replaced with SAE 5W-30 at
the next oil change.
Oil identification marks

API Service Symbol
ILSAC Certification Mark
Either or both API registered marks are added to some oil
containers to help you select the oil you should use.
 The API Service Symbol is located anywhere on the outside
of the container.
The top portion of the label shows the oil quality by API
(American Petroleum Institute) designation such as SL.
The center portion of the label shows the SAE viscosity
grade such as SAE 5W-30. Energy-Conservingº, shown
in the lower portion, indicates that the oil has fuel-saving
capabilities.
 The ILSAC (International Lubricant Standardization and
Approval Committee) Certification Mark is displayed on the
front of the container.

ENGINE
566To ensure excellent lubrication performance for your engine,
Toyota Genuine Motor Oilº is available, which has been
specifically tested and approved for all Lexus engines.
Please contact your Lexus dealer for further details about
Toyota Genuine Motor Oilº.
CHECKING THE ENGINE COOLANT
LEVEL

1Reservoir cap2Fº (upper) line
3Lº (lower) line
Look at the see-through coolant reservoir when the
engine is cold. The coolant level is satisfactory if it is
between the Fº and Lº lines on the reservoir. If the level
is low, add the coolant. (For the coolant type, see Coolant
type selectionº described below.)
The coolant level in the reservoir will vary with engine
temperature. However, if the level is on or below the Lº line,
add coolant. Bring the level up to the Fº line.

ENGINE
567
If the coolant level drops within a short time after replenishing,
there
may be a leak in the system. Visually check the radiator,
hoses, engine coolant filler cap, radiator cap and drain cock
and water pump.
If you can find no leak, have your Lexus dealer test the radiator
cap pressure and check for leaks in the cooling system.
CAUTION
To prevent burning yourself, do not remove the radiator
cap when the engine is hot.
Coolant type selection
Use of improper coolants may damage your engine cooling
system.
Only use Toyota Super Long Life Coolantº or similar high
quality ethylene glycol based non- silicate, non- amine,
non- nitrite, and non- borate coolant with long- life hybrid
organic acid t echnology. (Coolant with long-life hybrid organic
acid technology is a combination of low phosphates and
organic acids.) For the U.S.A. Ð Toyota Super Long Life Coolantº is a mixture
of 50% coolant and 50% deionized water. This coolant
provides protection down to about -35C (-31F).
For Canada Ð Toyota Super Long Life Coolantº is a mixture
of 55% coolant and 45% deionized water. This coolant
provides protection down to about -42C (-44F).

ENGINE
568
NOTICE
Do not use plain water alone.
Lexus recommends Toyota Super Long Life Coolantº, which
has been tested to ensure that it will not cause corrosion nor
result in malfunction of your engine coolant system with proper
usage. Toyota Super Long Life Coolantº is formulated with
long- life hybrid organic acid technology and has been
specifically designed to avoid engine cooling system
malfunction on Lexus vehicles.
Please contact your Lexus dealer for further details.CHECKING THE RADIATOR AND CONDENSER
If either of the above parts are extremely dirty or you are not
sure of their condition, take your vehicle to a Lexus dealer.
CAUTION
To prevent burning yourself, be careful not to touch the
radiator or condenser when the engine is hot.
NOTICE
To prevent damage to the radiator and condenser, do
not perform the work by yourself.

ENGINE
569
SPARK PLUGSYour engine is fitted with iridium-tipped spark plugs.
NOTICE
Use only iridium-tipped spark plugs and do not adjustgaps for your engine performance and smoothdrivability.

CHASSIS
573
NOTICE
Using automatic transmission fluid other than ToyotaGenuine ATF WSº may cause deterioration in shiftquality, locking up of your transmission accompaniedby vibration, and ultimately damage the automatictransmission of your vehicle.
Please contact your Lexus dealer for further details.
Ð BRAKES
Pedal clearance
55 mm (2.2 in.) Min. *1
Pedal free play1 Ð 6 mm (0.04 Ð 0.24 in.)
Brake pad wear limit1.0 mm (0.04 in.)
Parking brake lining wear limit1.0 mm (0.04 in.)
Parking brake adjustment5 Ð 7 clicks *2
Fluid typeSAE J1703 or FMVSS No. 116 DOT 3
*1: Minimum pedal clearance when depressed with the force of 490 N (50 kgf,\
110 lbf) with the engine running
*
2: Parking brake adjustment when pulled with the force of 196 N (20 kgf, 4\
4 lbf)

CHASSIS
576
CHECKING POWER STEERINGFLUID
The power steering fluid reservoir is located under the
right side engine compartment cover. Before checking
the power steering fluid, remove the cover. (For details,
see Removing the engine compart coversº on page 544.)
Check the fluid level, simply look at the see-through
reservoir. If necessary, add automatic transmission fluid
DEXRON
II or III .
If the vehicle has been driven around 80 km/h (50 mph) for 20
minutes (a little more in frigid temperatures), the fluid is hot
(60 C - 80 C or 140F - 175F). You may also check the level
when the fluid is cold (about room temperature, 10 C - 30C
or 50F - 85F) if the engine has not been run for about five
hours.

1If cold O.K.2If cold add3If hot O.K.
4If hot add
Clean all dirt off the reservoir and look at the fluid level. If the
fluid is cold, the level should be in the COLDº range. Similarly,
if it is hot, the fluid level should be in the HOTº range. If the
level is at the low side of the appropriate range, add automatic
transmission fluid DEXRON
II or III to bring the level within
the range.
To remove the reservoir cap, turn it counterclockwise and lift
up. To reinstall it, turn it clockwise. After replacing the reservoir
cap, visually check the steering box case, vane pump and hose
connections for leaks or damage.

CHASSIS
588
Glossary of tire terminology
Tire related termMeaning
Accessory weightthe combined weight (in excess of those standard items which may be rep\
laced)
of automatic transmission, power steering, power brakes, power windows, \
power
seats, radio, and heater, to the extent that these items are available as
factory-installed equipment (whether installed or not)
Cold tire inflation
pressuretire inflation pressure when the vehicle has been parked for at least 3 \
hours or
more, or it has not been driven more than 1.5 km or 1 mile under that co\
ndition
Curb weightthe weight of a motor vehicle with standard equipment including the maxi\
mum
capacity of fuel, oil, and coolant, and, if so equipped, air conditionin\
g and
additional weight optional engine
Intended outboard
sidewall(a) the sidewall that contains a whitewall, bears white lettering or bearsmanufacturer, brand, and/or model name molding that is higher or deeper
than the same molding on the other sidewall of the tire, or
(b) the outward facing sidewall of an asymmetrical tire that has a particula\
r side that must always face outward when mounted on a vehicle
Maximum inflation
pressurethe maximum cold inflation pressure to which a tire may be inflated and \
it is
shown on the sidewall of the tire
Maximum loaded
vehicle weightthe sum of Ð
(a) curb weight;
(b) accessory weight;
(c) vehicle capacity weight; and
(d) production options weight
Normal occupant
weight68 kg (150 lb.) times the number of occupants specified in the second \
column of
Table 1 that follows

CHASSIS
599
NOTICE
When jacking up or installing tire chains, be sure to turn
off the rear height control air suspension with the HEIGHT CONTROL OFFº switch and stop the engine.Otherwise, the vehicle height may change because ofthe automatic leveling function resulting in accident.

ELECTRICAL COMPONENTS
603
SPECIFICATIONS
Ð FUSE LOCATIONS
64PY003

1Engine compartment
2Driver's side instrument panel
Ð FUSES

Engine compartment