2018 Lexus GS350 engine

GS350_300_GS F_OM_OM30G34U_(U)
3696-2. Maintenance
6
Maintenance and care
Vehicle exterior
ItemsCheck points
Doors/trunk• Do the doors/trunk operate smoothly?
Engine hood• Does the engine hood lock system work prop-erly?
Fluid leaks•There should not be an y signs of fluid leakage
after the vehicle has been parked.
Tires
• Is the tire inflation pressure correct?
• The tires should not be damaged or excessively
worn.
• Have the tires been rotated according to the
maintenance schedule?
• The wheel nuts should not be loose.
Windshield wipers
•The wiper blades should not show any signs of
cracking, splitting, wear , contamination or defor-
mation.
• The wiper blades should clear the windshield without streaking or skipping.
WARNING
■If the engine is running
Turn the engine off and ensure that there is adequate ventilation before performing
maintenance checks.

371
GS350_300_GS F_OM_OM30G34U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Do-it-yourself service precautions
*: Vehicles with sing
le-beam headlights
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. 390)•Warm water• Baking soda•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(→ P. 389)
• FMVSS No.116 DOT 3 or SAE J1703 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/intercooler
coolant level
(→ P. 386)
•“Toyota 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
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 Cool ant” is pre-mixed with 55%
coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
( → P. 381)
• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( →P. 412)• Fuse with same amperage rating as original
Headlight aim*
( → P. 416)• Phillips-head screwdriver
Light bulbs
(→ P. 418)
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead sc rewdriver
•Wrench
Radiator and con-
denser (→P. 388)⎯
Tire inflation pres-
sure (→P. 403)• Tire pressure gauge• Compressed air source
Washer fluid
(→ P. 392)• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

372
GS350_300_GS F_OM_OM30G34U_(U)6-3. Do-it-yourself maintenance
WARNING
The engine compartment contains many mechan
isms and fluids that may move suddenly,
become hot, or become electrically energize d. 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 and
battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and corro-
sive 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 auto-
matically start to run if the air conditioning is on and/or the coolant temperature is high.
( → P. 388)
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting in
your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner f ilter removed may cause excessive engine wear due to dirt
in the air.

376
GS350_300_GS F_OM_OM30G34U_(U)6-3. Do-it-yourself maintenance
Engine compartment
GS350
Fuse boxes (→
P. 412)
Battery ( →P. 390)
Engine oil level dipstick (→P. 381)
Engine coolant reservoir (→P. 386)
Engine oil filler cap ( →P. 383) Brake fluid reservoir
(→P. 389)
Washer fluid tank ( →P. 392)
Electric cooling fans
Condenser ( →P. 388)
Radiator (→ P. 388)1
2
3
4
5
6
7
8
9
10

GS350_300_GS F_OM_OM30G34U_(U)
3776-3. Do-it-yourself maintenance
6
Maintenance and care
GS300
Fuse boxes (→P. 412)
Battery ( →P. 390)
Intercooler coolant reservoir (→P. 386)
Engine oil level dipstick (→P. 381)
Engine oil filler cap ( →P. 383) Engine coolant reservoir
(→P. 386)
Brake fluid reservoir (→P. 389)
Washer fluid tank ( →P. 392)
Condenser ( →P. 388)
Electric cooling fans
Radiator (→ P. 388)1
2
3
4
5
6
7
8
9
10
11

378
GS350_300_GS F_OM_OM30G34U_(U)6-3. Do-it-yourself maintenance
GS F
Fuse boxes (→
P. 412)
Battery ( →P. 390)
Engine oil level dipstick (→P. 381)
Engine coolant reservoir (→P. 386)
Engine oil filler cap ( →P. 383) Brake fluid reservoir
(→P. 389)
Washer fluid tank ( →P. 392)
Electric cooling fans
Condenser ( →P. 388)
Radiator (→ P. 388)1
2
3
4
5
6
7
8
9
10

GS350_300_GS F_OM_OM30G34U_(U)
3796-3. Do-it-yourself maintenance
6
Maintenance and care
■Removing the engine compartment cover
GS350/GS300 (Right-hand side)
GS350/GS300 (Center)
GS F
Engine compartment cover

380
GS350_300_GS F_OM_OM30G34U_(U)6-3. Do-it-yourself maintenance
■Installing the clips
Push up center portion
Insert
Press
1
2
3
NOTICE
■Checking the engine compartm ent cover after installation
Make sure that the cover is securely installed in its original position.