2013 Lexus GS350 engine

604
GS350_U (OM30C34U)
6-2. Maintenance
General maintenance
Listed below are the general maintenance items that should be per-
formed at the intervals specified in the “Warranty and Service Guide”
or “Owner’s Manual Supplement”. It is recommended that any prob-
lem you notice should be brought to the attention of your Lexus dealer
or qualified service shop for advice.
Engine compartment
ItemsCheck points
BatteryCheck the battery fluid level and
connections. ( P. 6 2 4 )
Brake fluidIs the brake fluid at the correct level?
( P. 6 2 3 )
Engine coolantIs the engine coolant at the correct
level? ( P. 6 2 0 )
Engine oilIs the engine oil at the correct level?
( P. 6 1 7 )
Exhaust systemThere should not be any fumes or
strange sounds.
Radiator/condenserThe radiator and condenser should be
free from foreign objects. ( P. 6 2 2 )
Wa s h e r f l u i dIs there sufficient washer fluid?
( P. 6 2 8 )

GS350_U (OM30C34U)
6076-2. Maintenance
6
Maintenance and care
Ve h i c l e e x t e r i o r
ItemsCheck points
Doors/trunk• Do the doors/trunk operatesmoothly?
Engine hood• Does the engine hood lock systemwork properly?
Fluid leaks
• There should not be any signs of fluidleakage after the vehicle has been
parked.
Ti r e s
• Is the tire inflation pressure correct?
• The tires should not be damaged orexcessively worn.
• Have the tires been rotated accord- ing to the maintenance schedule?
• The wheel nuts should not be loose.
CAUTION
■If the engine is running
Turn the engine off and ensure that there is adequate ventilation before performing
maintenance checks.

609
GS350_U (OM30C34U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct
procedure as given in these sections.
ItemsPa r t s a n d t o o l s
Battery condition ( P. 6 2 4 )
•Warm water
•Baking soda
•Grease
• Conventional wrench
(for terminal clamp bolts)
•Distilled water
Brake fluid level ( P. 6 2 3 )
• 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. 6 2 0 )
•“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 technol-
ogy
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 coolant)
Engine oil level ( P. 6 1 7 )
• “Toyota Genuine Motor Oil” or
equivalent
•Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( P. 6 4 8 )• Fuse with same amperage rating as
original

GS350_U (OM30C34U)
6116-3. Do-it-yourself maintenance
6
Maintenance and care
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 and rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.
■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
automatically start to run if the air conditioning is on and/or the coolant tempera-
ture is high. ( P. 6 2 2 )
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from get-
ting 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. Also, a backfire could cause a fire in the engine compartment.

614
GS350_U (OM30C34U)
6-3. Do-it-yourself maintenance
CAUTION
■When raising your vehicle
Make sure to observe the following precautions to reduce the possibility of death
or serious injury:
●When using a floor jack, follow the instructions of the manual provided with the
jack.
●Do not use the jack that was supplied with your vehicle.
●Do not put any part of your body underneath the vehicle when it is supported
only by the floor jack.
●Always use floor jack and/or automotive jack stands on a solid, flat, 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 shift the
shift lever to 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 object on top of or underneath the
floor jack.
●Lift up the vehicle using a floor jack such as
the one shown in the illustration.

615
GS350_U (OM30C34U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Engine compartment
Fuse boxes ( P. 6 4 8 )
Battery ( P. 6 2 4 )
Engine oil level dipstick (P. 617)
Engine coolant reservoir (P. 620)
Engine oil filler cap (P. 6 1 8 ) Brake fluid reservoir
(P. 623)
Washer fluid tank ( P. 6 2 8 )
Electric cooling fans
Condenser ( P. 6 2 2 )
Radiator ( P. 6 2 2 )1
2
3
4
5
6
7
8
9
10

616
GS350_U (OM30C34U)
6-3. Do-it-yourself maintenance
■Removing the engine compartment cover
Right-hand side
Center
■Installing the clipsPush up center portion
Insert
Press
Engine compartment cover
1
2
3
NOTICE
■Checking the engine compartment cover after installation
Make sure that the cover is securely installed in its original position.

GS350_U (OM30C34U)
6176-3. Do-it-yourself maintenance
6
Maintenance and care
With the engine at operating temperature and turned off, check the oil
level on the dipstick.
■Checking the engine oil
Park the vehicle on level ground. After warming up the engine and
turning it off, wait more than 5 m inutes for the oil to drain back into
the bottom of the engine.
Holding a rag under the end,
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.
Low
Full
Wipe the dipstick and reinsert it fully.
Engine oil
1
2
3
4
5
1
2
Ty p e AType B
6