1999 Lexus LS400 engine

INTRODUCTION
388
61L004b
The engine number is stamped on the engine block
as shown.

61L005a
INTRODUCTION
389
ENGINE COMPARTMENT OVERVIEW
1 Brake fluidreservoir
2 Fuse box
3 Battery
4 Washerfluid tank
5 Engine oilleveldipstick
6 Engine oil
filler cap
7 Power
steeringfluidreservoir
8 Engine
coolantreservoir

INTRODUCTION
391
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.

INTRODUCTION
392
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 408.
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 409
for instructions.

Demineralized or distilled water
Tools:

Funnel (only for adding coolant)

SECTION 6 ± 2
395
SERVICE PROCEDURES AND
SPECIFICATIONS
Engine
Specifications396
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 400
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . .
Facts about engine oil consumption 402
. . . . . . . . . . . . .
Used engine oil 404
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the engine oil level 405
. . . . . . . . . . . . . . . . . . .
Checking the engine coolant level 409
. . . . . . . . . . . . . . .
Spark plugs 413
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ENGINE
396
SPECIFICATIONS
± GENERAL

62L005±1
Temperature range anticipated before next oil change
ENGINE
397
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

ENGINE
398± COOLING SYSTEM
Capacity
Coolant type
10.8 L (11.4 qt., 10.4 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.)