2018 Lexus IS350 engine

4627-2. Maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
General maintenance
Listed below are the general maintenanc e items that should be performed at
the intervals specified in the “Warranty and Service Guide” or “Owner’s
Manual Supplement”. It is recommende d that any problem you notice should
be brought to the attention of your Lexu s dealer or qualified service shop for
advice.
Engine compartment
ItemsCheck points
BatteryCheck the connections. (→ P. 480)
Brake fluidIs the brake fluid at the correct level? ( →P. 479)
Engine/intercooler coolantIs the engine/intercooler c oolant at the correct level?
(→ P. 476)
Engine oilIs the engine oil at the correct level? ( →P. 473)
Exhaust systemThere should not be any fumes or strange sounds.
Radiator, condenser and
intercooler radiatorThe radiator and condenser should be free from for-
eign objects. ( →P. 478)
Washer fluidIs there sufficient washer fluid? ( →P. 482)

4647-2. Maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Vehicle exterior
ItemsCheck points
Doors/trunk• Do the doors/trunk operate smoothly?
Engine hood• Does the engine hood lock system work properly?
Fluid leaks• There should not be any 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 mainte- nance schedule?
• The wheel nuts should not be loose.
Windshield wipers
•The wiper blades should no t show any signs of crack-
ing, splitting, wear, contamination or deformation.
• 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.

466
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
7-3. Do-it-yourself maintenance
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. 480)•Warm water• Baking soda•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(→ P. 479)• SAE J1703 or FMVSS No.116 DOT 3 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/intercooler
coolant level
(→ P. 476)
• “Toyota Super Long Life Coolan t” 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. 473)
• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
(→ P. 502)• Fuse with same amperage rating as original
Light bulbs
(→ P. 505)
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead sc rewdriver
•Wrench
Radiator, condenser
and intercooler radi-
ator (→P. 478)
⎯
Tire inflation pres-
sure (→P. 493)• Tire pressure gauge• Compressed air source
Washer fluid
(→ P. 482)• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

4677-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
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. 478)
■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.

4717-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
IS350 AWD/IS350/IS300 AWD
Engine compartment
Fuse boxes (→P. 502)
Battery ( →P. 480)
Engine oil level dipstick (→P. 473)
Engine coolant reservoir (→P. 476)
Engine oil filler cap (→ P. 474)Brake fluid reservoir (
→P. 479)
Washer fluid tank ( →P. 482)
Electric cooling fans
Condenser ( →P. 478)
Radiator (→ P. 478)1
2
3
4
5
6
7
8
9
10

4727-3. Do-it-yourself maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
IS300
Fuse boxes (→P. 502)
Battery ( →P. 480)
Intercooler
Engine oil level dipstick (→P. 473)
Engine oil filler cap (→ P. 474)
Engine coolant reservoir (→P. 476) Brake fluid reservoir (
→P. 479)
Washer fluid tank ( →P. 482)
Electric cooling fans
Condenser ( →P. 478)
Intercooler radiator (→ P. 476)
Radiator (→ P. 478)
Intercooler coolant reservoir (→P. 476)1
2
3
4
5
6
7
8
9
10
11
12
13

4737-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
With the engine at operating temperatur e and turned off, check the oil level on
the dipstick.
■Checking the engine oil
Park the vehicle on level ground. Afte r warming up the engine and turning
it off, wait more than 5 minutes 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
Normal
Excessive
The shape of the dipstick may dif-
fer depending on the type of vehi-
cle or engine.
Wipe the dipstick and reinsert it fully.
Engine oil
1
2
IS350 AWD/IS350/
IS300 AWDIS300
3
4
5
1
2
3
6

4747-3. Do-it-yourself maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■Adding engine oil
If the oil level is below or near the lo w level mark, add engine oil of the same
type as that already in the engine.
Make sure to check the oil type and prepare the items needed before adding
oil.
Remove the oil filler cap by turning it counterclockwise.
Add engine oil slowly, checking the dipstick.
Install the oil filler cap by turning it clockwise.
■Engine oil consumption
A certain amount of engine oil will be consumed while driving. In the following situations,
oil consumption may increase, and engine oil may need to be refilled in between oil
maintenance intervals.
●When the engine is new, for example directly after purchasing the vehicle or after
replacing the engine
●If low quality oil or oil of an inappropriate viscosity is used
●When driving at high engine speeds or with a heavy load, or when driving while accel-
erating or decelerating frequently
●When leaving the engine idling for a long time, or when driving frequently through
heavy traffic
IS350 AWD/IS350/
IS300 AWDIS300
Engine oil selection →P. 588
Oil quantity (Low → Full) 1.6 qt. (1.5 L, 1.3 Imp. qt.)
Items Clean funnel
1
2
3