2008 Lexus GS350 engine

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4-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance yourself, be sure to follow the correct proce-
dure given in these sections.
ItemsPa r t s a n d t o o l s
12 volt battery condition (P. 4 1 7)
•Grease
• Conventional wrench
(for terminal clamp bolts)
Brake fluid level ( P. 4 1 6 )
• FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant level 
(P. 4 1 4 )
• “Toyota Super Long Life Coolant”
or similar high quality ethylene gly-
col based non-silicate, non-amine,
non-nitrite and non-borate coolant
with long-life hybrid organic acid
technology.
For the U.S.A.: 
“Toyota Super Long Life Coolant”
is pre-mixed with 50% coolant and
50% deionized water.
For Canada: 
“Toyota Super Long Life Coolant”
is pre-mixed with 55% coolant and
45% deionized water.
• Funnel (used only for adding cool- ant)

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Maintenance and care
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ItemsPa r t s a n d t o o l s
Engine oil level (P. 4 0 9 )
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel, funnel (used
only for adding engine oil)
Fuses ( P. 4 4 2 )• Fuse with same amperage rating as
original
Headlight aim ( P. 4 6 7 )• Phillips-head screwdriver
Radiator and condenser (P. 4 1 5 )
Tire inflation pressure (P. 4 3 1 )• Tire pressure gauge
• Compressed air source
Wa s h e r f l u i d ( P. 4 2 0 )
• Water washer fluid containing anti-
freeze (for winter use)
•Funnel

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4-3. Do-it-yourself maintenance
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CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury,
observe the following precautions.
■When working on the engine compartment
●Keep hands, clothing, and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator , exhaust manifold, etc. right after driv-
ing as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily , such as paper or rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the 12 volt battery.
Fuel and 12 volt battery fumes are flammable.
●Be extremely cautious when working on the 12 volt battery. It contains poisonous
and corrosive sulfuric acid.
■When working near the electric cooling fan or radiator grille
Be sure the “ENGINE START STOP” switch is OFF. 
With the “ENGINE START STOP” switch in IGNITION ON mode, the electric
cooling fan may automatically start to run if the air conditioning is on and/or the
coolant temperature is high. ( P. 4 1 5 )
■Safety glasses
Wear safety glasses to prevent flying or fall ing material, fluid spray, etc. from getting
in the eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to
dirt in the air. Also a backfire could cause a fire in the engine compartment.

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4-3. Do-it-yourself maintenance
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Maintenance and care
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CAUTION
■When raising your vehicle
Make sure to observe the following to reduce the possibility of death or serious
injury.
●Do not use the jack that was supplied with your vehicle.
●Do not put any part of your body or get underneath the vehicle supported only by
the floor jack.
Always use automotive jack stands or a solid, level surface.
●Do not start the engine while the vehicle is supported by the floor jack.
●Stop the vehicle on level firm ground, firmly set the parking brake and put the shift
lever in “P”.
●Make sure to set the floor jack properly at the jack point. 
Raising the vehicle with an improperly positioned floor jack will damage the vehi-
cle and may cause the vehicle to fall off the floor jack.
●Do not raise the vehicle while someone is in the vehicle.
●When raising the vehicle, do not place any objects on top of or underneath the
floor jack.
●Lift up the vehicle using a floor jack such as
the one shown in the illustration.

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4-3. Do-it-yourself maintenance
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Engine compartment
GS460
Engine oil level dipstick
( P. 4 0 9 )
Engine oil filler cap 
( P. 410)
Brake fluid reservoir 
( P. 4 1 6 )
Fuse box ( P. 4 4 2 )
Washer fluid tank 
( P. 420)Engine coolant reservoir 
( P. 4 1 4 )
Electric cooling fans
Condenser ( P. 415)
Radiator ( P. 415)
Fuse box ( P. 4 4 2 )
12 volt battery ( P. 417)

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4-3. Do-it-yourself maintenance
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Maintenance and care
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GS350
Engine oil level dipstick
( P. 4 0 9 )
Engine oil filler cap 
( P. 410)
Brake fluid reservoir (P. 4 1 6 )
Fuse box ( P. 4 4 2 )
Washer fluid tank 
( P. 420)Engine coolant reservoir 
( P. 4 1 4 )
Electric cooling fans
Condenser ( P. 415)
Radiator ( P. 415)
Fuse box ( P. 4 4 2 )
12 volt battery ( P. 417)

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4-3. Do-it-yourself maintenance
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Engine compartment cover■ Removing the cover
Front
Right-hand side
Left-hand side

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4-3. Do-it-yourself maintenance
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Maintenance and care
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May 13, 2008 5:14 pm
■Installing the clips
Push up center portion
Insert
Press
Engine oil
With the engine at operating temperat ure and turned off, check the oil
level on the dipstick.
■ Checking the engine oil
Park the vehicle on level ground. After turning off the engine, wait
a few minutes for the oil to drain back into the bottom of the
engine.
Hold a rag under the end and pull
the dipstick out.
Wipe the dipstick clean.
Reinsert the dipstick fully.
Holding a rag under the end, pull the dipstick out and check the
oil level.
STEP1
STEP2
STEP3
STEP4
STEP5