2015 Lexus GS F engine

4366-1. Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
WA R N I N G
■When washing the vehicle
Do not apply water to the inside of the engine compartment. Doing so may cause the
electrical components etc. to catch fire.
■When cleaning the windshield (vehicles with rain-sensing windshield wipers)
●When the upper part of the windshield where the raindrop sensor is located is
touched by hand
●When a wet rag or similar is held close to the raindrop sensor
●If something bumps against the windshield
●If you directly touch the raindrop sensor bo dy or if something bumps into the raindrop
sensor
■Precautions regarding the exhaust pipes and rear bumper diffusers
Exhaust gases cause the exhaust pipes and rear bumper diffusers to become quite hot.
When washing the vehicle, be careful not to touch the pipes and diffusers until they
have cooled sufficiently, as touching hot exhaust pipes and rear bumper diffusers can
cause burns.
■Precaution regarding the rear bumper with Blind Spot Monitor (if equipped)
If the paint of the rear bumper is chipped or scratched, the system may malfunction. If
this occurs, consult any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
Turn off AUTO mode of the wiper to prevent
the wiper from operating. ( →P. 2 74 )
If AUTO mode is selected, the wipers may
operate unexpectedly in the following situa-
tions, and may result in hands being caught or
other serious injuries and cause damage to the
wiper blades.

4426-2. Maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
■Does your vehicle need repairs?
Be on the alert for changes in performance and sounds, and visual tip-offs that indicate
service is needed. Some important clues are:
●Engine missing, stumbling or pinging
●Appreciable loss of power
●Strange engine noises
●A fluid leak under the vehicle (However, water dripping from the air conditioning sys-
tem after use is normal.)
●Change in exhaust sound (This may indicate a dangerous carbon monoxide leak. Drive
with the windows open and have the exhaust system checked immediately.)
●Flat-looking tires, excessive tire squeal when cornering, uneven tire wear
●Vehicle pulls to one side when driven straight on a level road
●Strange noises related to suspension movement
●Loss of brake effectiveness, spongy feeling brake pedal, pedal almost touches the floor,
vehicle pulls to one side when braking
●Engine coolant temperature continually higher than normal ( →P. 1 0 9 )
If you notice any of these clues, take your vehicle to any authorized Lexus dealer or
repairer, or another duly qualified and equipp ed professional as soon as possible. Your
vehicle may need adjustment or repair.
WA R N I N G
■If your vehicle is not properly maintained
Improper maintenance could result in serious damage to the vehicle and possible
death or serious injury.
■Handling of the battery
Battery posts, terminals and related accessories contain lead and lead compounds
which are known to cause brain damage. Wash your hands after handling. ( →P. 4 6 0 )

443
6
6-3. Do-it-yourself maintenance
Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections.
ItemsParts and tools
Battery condition
(
→ P. 4 6 0 ) •Warm water •Baking soda •Grease
• Conventional wrench (for terminal clamp bolts)
• Distilled water
Engine/intercooler
coolant level
(
→ P. 4 5 8 ) •“
To y o t a Super Long Life Coolant” or a similar high quality
ethylene glycol-based non-silicate, non-amine, non-nitrite
and non-borate coolant with long-life hybrid organic acid
technology
“Toyota Super Long Life Coolant” is pre-mixed with 50%
coolant and 50% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
( → P. 4 5 3 )• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( →P. 4 8 7 )• Fuse with same amperage rating as original
Light bulbs
(→ P. 4 9 2 )• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead screwdriver
•Wrench
Radiator and
condenser
(→ P. 4 6 0 )
Tire inflation
pressure ( →P. 4 7 9 )• Tire pressure gauge• Compressed air source
Wa s h e r f l u i d
(→ P. 464)• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

4446-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
WA R N I N G
The engine compartment contains many mechanisms and fluids that may move suddenly,
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 driving
as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel or
the battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and corro-
sive sulfuric acid.
●Take care because brake fluid can harm your hands or eyes and damage painted sur-
faces. If fluid gets on your hands or in your eyes, flush the affected area with clean
water immediately. If you still experience discomfort, consult a doctor.
■When working near the electric cooling fans or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION ON mode, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant temperature is high.
( → P. 4 6 0 )
■Safety glasses
Wear safety glasses to prevent flying or fallin g material, fluid spray, etc. from getting in
your 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.
■If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear or when
the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, it may indicate a serious problem.

4486-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
Engine compartment
XGS350
Fuse boxes (→P. 4 8 7 )
Battery ( →P. 4 6 0 )
Engine oil level dipstick( →P. 4 5 3 )
Engine coolant reservoir (→ P. 4 5 8 ) Engine oil filler cap (
→P. 4 5 5 )
Wa s h e r f l u i d t a n k ( →P. 464)
Electric cooling fans
Condenser ( →P. 4 6 0 )
Radiator ( →P. 4 6 0 )1
2
3
4
5
6
7
8
9

449 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
XGS200t
Fuse boxes (→P. 4 8 7 )
Battery ( →P. 4 6 0 )
Intercooler coolant reservoir (→ P. 4 5 9 )
Engine oil level dipstick( →P. 4 5 3 )
Engine oil filler cap ( →P. 4 5 5 ) Engine coolant reservoir
(→ P. 4 5 8 )
Wa s h e r f l u i d t a n k ( →P. 464)
Condenser ( →P. 4 6 0 )
Electric cooling fans
Radiator ( →P. 4 6 0 )1
2
3
4
5
6
7
8
9
10

4506-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
XGS F
For right-hand drive vehicles:
The battery and the fuse box in front of the battery are located on the opposite
side of the engine compartment.
Fuse boxes ( →P. 4 8 7 )
Battery ( →P. 4 6 0 )
Engine oil level dipstick( →P. 4 5 3 )
Engine coolant reservoir (→ P. 4 5 8 ) Engine oil filler cap (
→P. 4 5 5 )
Wa s h e r f l u i d t a n k ( →P. 464)
Electric cooling fans
Condenser ( →P. 4 6 0 )
Radiator ( →P. 4 6 0 )1
2
3
4
5
6
7
8
9

451 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
■Removing the engine compartment cover
XGS350/GS200t (Right-hand side)
XGS350/GS200t (Center)
XGS F
Engine compartment cover