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INTRODUCTION
400
CAUTION
When the engine is running, keep hands, clothing,
and tools away from the moving fan and engine drive
belt. (Removing rings, watches, and ties is
advisable.)
Right after driving, the engine compartment ± the
engine, radiator, exhaust manifold and power
steering fluid reservoir, etc. ± will be hot. So be
careful not to touch them. Oil and other fluids may
also be hot.
Do not smoke, cause sparks or allow open flames
around fuel or the battery. Their fumes are
flammable.
Be extremely cautious when working on the battery.
It contains poisonous and corrosive sulfuric acid.
Do not get under your vehicle with just the body jack
supporting it. Always use automotive jack stands or
other solid supports.
Be sure the ignition is off if you work near the electric
cooling fan or radiator grille. With the ignition on, the
electric cooling fan may automatically start to run if
the air conditioning is on and/or if the coolant
temperature is high.
Use eye protection whenever you work on or under
your vehicle where you may be exposed to flying or
falling material, fluid spray, etc.
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INTRODUCTION
401
NOTICE
Remember that battery and ignition cablescarry high currents or voltages. Be careful ofaccidentally causing a short circuit.
Before closing the engine hood, check to seethat you have not forgotten any tools, rags, etc.
Do not drive with the air cleaner removed, or
excessive engine wear could result. Alsobackfiring could cause a fire in the enginecompartment.
Do not overfill automatic transmission fluid, orthe transmission could be damaged.
Be careful not to scratch the glass surface withthe wiper frame.
PARTS AND TOOLS
Here is a list of parts and tools you will need to perform
do±it±yourself maintenance. Remember all Lexus parts
are designed in metric sizes, so your tools must be
metric.
Checking the engine oil level
Parts (if level is low):
Use API grade SJ, ºEnergy±Conservingº multigrade
engine oil or ILSAC multigrade engine oil. For
recommended oil viscosity, see page 416.
Tools:
Rag or paper towel
Funnel (only for adding oil)
Checking the engine coolant level
Parts (if level is low):
ªToyota Long Life Coolantº or equivalent
See ºChecking the engine coolant levelº on page 417
for instructions.
Demineralized or distilled water
Tools:
Funnel (only for adding coolant)
Page 419 of 502
INTRODUCTION
402
Checking brake fluid
Parts (if level is low):
FMVSS No. 116 DOT 3 or SAE J1703 brake fluid
Tools:
Funnel (only for adding fluid)
Checking power steering fluid
Parts (if level is low):
Automatic transmission fluid DEXRON
II or III
Tools:
Rag or paper towel
Funnel (only for adding fluid)
Checking battery condition
Tools:
Warm water
Baking soda
Grease
Conventional wrench (for terminal clamp bolts)
Checking and replacing the blade type
fuses
Parts (if replacement is necessary):
Fuse with same amperage rating as original
Checking the cartridge type fuses
Parts (if replacement is necessary):
Genuine Lexus fuse or equivalent with same
amperage rating as original
Adding washer fluid
Parts:
Water
Washer fluid containing antifreeze (for winter use)
Tools:
Funnel
Page 420 of 502
SECTION 6 ± 2
403
SERVICE PROCEDURES AND
SPECIFICATIONS
Engine
Specifications404
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 407
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . .
Facts about engine oil consumption 409
. . . . . . . . . . . . .
Used engine oil 411
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the engine oil level 413
. . . . . . . . . . . . . . . . . . .
Checking the engine coolant level 417
. . . . . . . . . . . . . . .
Spark plugs 421
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page 421 of 502
ENGINE
404
SPECIFICATIONS
± GENERAL
Page 422 of 502
62L005±1
Temperature range anticipated before next oil change
ENGINE
405
Model
Type
Bore and stroke
Displacement
Valve clearance (engine cold)
Intake
Exhaust
Drive belt tension
1UZ±FE
8 cylinder V type, 4 cycle, gasoline
87.5 X 82.5 mm (3.44 X 3.25 in.)
3969 cm
3 (242.1 cu.in.)
0.15 ± 0.25 mm (0.006 ± 0.010 in.)
0.25 ± 0.35 mm (0.010 ± 0.014 in.)
Automatic adjustment
± LUBRICATION SYSTEM Oil capacity Drain and refillwith filter
without filter
Oil grade
Recommended oil viscosity (SAE):
5.6 L (5.9 qt., 4.9 lmp.qt.)
5.3 L (5.6 qt., 4.7 lmp.qt.)
API SJ, ºEnergy±Conservingº multigrade engine oil or
ILSAC multigrade engine oil
Page 423 of 502
ENGINE
406± COOLING SYSTEM
Capacity
Coolant type
10.8 L (11.4 qt., 9.5 lmp.qt.)
ºToyota Long Life Coolantº or equivalent
With ethylene±glycol type coolant for a proper
corrosion protection of aluminum components
Do not use alcohol type antifreeze or plain water
alone.
± FUELFuel type
Octane rating
Only UNLEADED
91 (Research octane number 96) or higher
± IGNITION SYSTEMSpark 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 key is
removed with all the lights turned off]
5A max.
Page 424 of 502

ENGINE
407
FUEL
Fuel type
Your vehicle must use only unleaded gasoline.
To help prevent gas station mixups, your Lexus has a
smaller fuel tank opening. The special nozzle on pumps
with unleaded fuel will fit it, but the larger standard nozzle
on pumps with leaded gas will not.
At a minimum, the gasoline you use should meet the
specifications of ASTM D4814 in the U.S.A. and CGSB
3.5±M93 in Canada.
NOTICE
Do not use leaded gasoline. Use of leaded gasoline will cause the three±way catalyticconverter to lose its effectiveness and theemission control system to function improperly.Also, this can increase maintenance costs.
Octane rating
Select premium unleaded gasoline with an Octane
Rating of 91 (R esearch Octane Number 96) or higher
for optimum engine performance. However, if such
premium type cannot be obtained, you may
temporarily use unleaded gasoline with an Octane
Rating as low as 87 (Research Octane Number 91). Use of unleaded fuel with an octane number or rating
lower than stated above will cause persistent heavy
knocking. If severe, this will lead to engine damage.
If your engine knocks ...
If you detect heavy knocking even when using the
recommended
fuel, or if you hear steady knocking while
holding a steady speed on level roads, consult your
Lexus dealer.
However, now and then, you may notice light knocking
for a short time while accelerating or driving up hills. This
is no cause for concern.