engine LEXUS IS250 2016 Manual Online

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4-3. Do-it-yourself maintenance
CAUTION
nWhen 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. 3 1 9 )
nSafety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in the eyes.
NOTICE
nIf you remove the air cleaner
Driving with the air 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
4

Maintenance and care
CAUTION
nWhen raising your vehicle
Make sure to observe the following to reduce the possibility of death or serious
injury.
lDo not use the jack that was supplied with your vehicle.
lDo not put any part of your body or get underneath the vehicle supported only by
the floor jack.
Always use automotive jack stands on a solid, level, surface.
lDo not start the engine while the vehicle is supported by the floor jack.
lStop the vehicle on level firm ground, firmly set the parking brake and put the shift
lever in P (automatic) or R (manual).
lMake 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.
lDo not raise the vehicle while someone is in the vehicle.
lWhen raising the vehicle, do not place any objects on top of or underneath the
floor jack.
lLift 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
Engine compartment
IS350
Battery (→P. 321)
Engine oil level dipstick
(→P. 313)
Engine oil filler cap
(→P. 313)
Brake fluid reservoir
(→P. 319)
Fuse boxes (→P. 3 4 7 )
Washer fluid tank
(→P. 32 4 )
Electric cooling fans
Condenser (→P. 319)
Radiator (→P. 319)
Engine coolant reservoir
(→P. 317)

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4

Maintenance and care
IS250
Battery (→P. 321)
Engine oil level dipstick
(→P. 313)
Engine oil filler cap
(→P. 313)
Brake fluid reservoir
(→P. 319)
Fuse boxes (→P. 3 4 7 )
Washer fluid tank
(→P. 32 4 )
Electric cooling fans
Condenser (→P. 319)
Radiator (→P. 319)
Engine coolant reservoir
(→P. 317)

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4-3. Do-it-yourself maintenance
Engine compartment cover
nRemoving the engine compartment cover
Front
Outside
nInstalling the clips
Press the tip of the clip against a
hard surface, such as a desk, to
allow the center part of the clip
to be pushed up.
Insert
Press

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4-3. Do-it-yourself maintenance
4

Maintenance and care
Engine oil
With the engine at operating temperature and turned off, check the oil
level on the dipstick.
nChecking the engine oil
Park the vehicle on level ground. After turning off the engine, wait
more than five 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.
Wipe the dipstick and reinsert it fully.
Low
Full
STEP1
STEP2
STEP3
STEP4
STEP5
STEP6

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4-3. Do-it-yourself maintenance
nAdding engine oil
If the oil level is below or near the
low level mark, add engine oil of
the same type as 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 filler cap, turning it clockwise.
It takes about 1.6 qt. (1.5 L, 1.3 lmp.qt.) to raise the oil level from low to full on the
dipstick.
Oil gradeILSAC multi-grade engine oil
ItemsClean funnel
STEP1
STEP2
STEP3

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4-3. Do-it-yourself maintenance
nEngine oil consumption
lThe amount of engine oil consumed depends on the oil viscosity, the quality of
the oil and the way the vehicle is driven.
lMore oil is consumed under driving conditions such as high speeds and fre-
quent acceleration and deceleration.
lA new engine consumes more oil.
lWhen judging the amount of oil consumption, keep in mind that the oil may
have become diluted, making it difficult to judge the true level accurately.
lOil consumption: Max. 1.1 qt./600 miles, 0.9 lmp.qt./600 miles (1.0 L per 1000
km)
lIf you consume more than 1.1 qt. (1.0 L, 0.9 lmp.qt.) every 600 miles (1000 km),
contact your Lexus dealer.
nAfter changing the engine oil (U.S.A. only)
The oil change system should be reset. Perform the following procedures:
Switch the display to the odometer (→P. 142) when the engine is running.
Turn the “ENGINE START STOP” switch OFF.
While pressing the trip meter reset button, set the “ENGINE START
STOP” switch to the IGNITION ON mode (but do not start the engine
because otherwise the reset mode will be cancelled). Continue to press
and hold the button until the trip meter displays 000000.
CAUTION
nUsed engine oil
lUsed engine oil contains potentially harmful contaminants which may cause skin
disorders such as inflammation or skin cancer, so care should be taken to avoid
prolonged and repeated contact. To remove used engine oil from your skin, wash
thoroughly with soap and water.
lDispose of used oil and filters only in a safe and acceptable manner. Do not dis-
pose of used oil and filters in household trash, in sewers or onto the ground.
Call your Lexus dealer, service station or auto parts store for information con-
cerning recycling or disposal.
lDo not leave used engine oil within the reach of children.
STEP1
STEP2
STEP3

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Maintenance and care
Engine coolant
The coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the engine is cold.
Reservoir cap
“FULL”
“LOW”
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line.
NOTICE
nTo prevent serious engine damage
Check the oil level on regular basis.
nWhen replacing the engine oil
lBe careful not to spill engine oil on the vehicle components.
lAvoid overfilling, or the engine could be damaged.
lCheck the oil level on the dipstick every time you refill the vehicle.
lBe sure the engine oil filler cap is properly tightened.

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4-3. Do-it-yourself maintenance
nIf the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, engine coolant filler cap, radiator cap, drain cock
and water pump.
If you cannot find a leak, have your Lexus dealer pressure test the cap and check for
leaks in the cooling system.
nCoolant selection
Only use “Toyota Super Long Life Coolant” or similar high-quality ethylene glycol-
based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life
hybrid organic acid technology.
U.S.A.: “Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50%
deionized water. (Enabled: -31°F [-35°C])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45%
deionized water. (Enabled: -44°F [-42°C])
For more details about engine coolant, contact your Lexus dealer.
CAUTION
nWhen the engine is hot
Do not remove the radiator cap.
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing burns or other injuries.
NOTICE
nWhen adding engine coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water
and antifreeze must be used to provide proper lubrication, corrosion protection
and cooling. Be sure to read the antifreeze or coolant label.
nIf you spill coolant
Be sure to wash it off with water to prevent it damaging parts or paint.