2011 Lexus IS F engine coolant

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4-3. Do-it-yourself maintenance
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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
To prevent serious engine damage
Check the oil level on a regular basis.
When replacing the engine oil
Be careful not to spill engine oil on the vehicle components.
Avoid overfilling, or the engine could be damaged.
Check the oil level on the dipstick every time you refill the vehicle.
Be sure the engine oil filler cap is properly tightened.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
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If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, coolant reservoir cap, drain cock and
water pump.
If you cannot find a leak, have any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional, test the cap and check for
leaks in the cooling system.
Coolant selection
Only use “Toyota Super Long Life Coolant” or similar high-quality eth-
ylene 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 a mixture of 50% coolant and 50%
deionized water. (Enabled: -35C [-31F])
For more details about engine coolant, contact any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional.
CAUTION
When the engine is hot
Do not remove the coolant reservoir cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
When 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.
If you spill coolant
Be sure to wash it off with water to prevent damage to parts or paint.

5
423
5-1. Essential information
When trouble arises
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If you think something is wrong
If you notice any of the following symptoms, your vehicle probably
needs adjustment or repair. Contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional, as soon
as possible.
Visible symptoms
Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is nor-
mal.)
Flat-looking tires or uneven tire wear
Engine coolant temperature gauge needle continually points
higher than normal
Audible symptoms
Changes in exhaust sound
Excessive tire squeal when cornering
Strange noises related to the suspension system
Pinging or other noises related to the engine
Operational symptoms
Engine missing, stumbling or running rough
Appreciable loss of power
Vehicle pulls heavily to one side when braking
Vehicle pulls heavily to one side when driving on a level
road

5
465
5-2. Steps to take in an emergency
When trouble arises
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If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the automatic
air conditioning system.
Check to see if steam is coming out from under the hood.
If you see steam:
Stop the engine. Carefully lift the hood after the steam
subsides and then restart the engine.
If you do not see steam:
Leave the engine running and carefully lift the hood.
Check to see if the cooling fans are operating.
If the fans are operating:
Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the
engine.
If the fans are not operating:
Stop the engine immediately and call any authorized
Lexus dealer or repairer, or another duly qualified and
equipped professional.
After the engine has cooled
down sufficiently, check the
engine coolant level and
inspect the radiator core
(radiator) for any leaks.
If the engine compartment
cover needs to be removed:
STEP1
STEP2
STEP3
STEP4

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5-2. Steps to take in an emergency
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Overheating
If you observe the following, your vehicle may be overheating.
The display on the engine coolant temperature gauge flashes or a loss of
power is experienced.
Steam is coming from under the hood.
CAUTION
To prevent an accident or injury when inspecting under the hood of your
vehicle
If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injury such as burns.
Keep hands and clothing away from the fans and belt while the engine is
running.
Do not loosen the coolant reservoir cap while the engine and radiator are
hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
Add engine coolant if neces-
sary.
Water can be used in an
emergency if engine coolant
is unavailable.
(P. 4 7 7)
Have the vehicle checked at the nearest authorized Lexus dealer
or repairer, or another duly qualified and equipped professional,
as soon as possible.
STEP5

5
467
5-2. Steps to take in an emergency
When trouble arises
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NOTICE
When adding engine coolant
Wait until the engine has cooled down before adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too
quickly can cause damage to the engine.

494
Alphabetical index
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Electric power steering ..............206
Electronic key
If the electronic key does not
operate properly .................458
Emergency, in case of
If a warning message is
displayed ............................431
If the engine will not start.....454
If the shift lever cannot be
shifted from P .....................456
If the vehicle has a discharged
battery.................................462
If the warning buzzer sounds425
If the warning light turns on .425
If you have a flat tire ...........444
If you lose your keys ............457
If you think something is
wrong .................................423
If your electronic key does not
operate properly .................458
If your vehicle becomes stuck ....
468
If your vehicle has to be
stopped in an emergency ....469
If your vehicle needs to be
towed ..................................417
If your vehicle overheats ......465
Emergency flashers
Switch ...................................416Engine
ACCESSORY mode ............ 146
Compartment ....................... 366
Engine switch ...................... 146
Hood .................................... 363
How to start the engine ........ 146
Identification number .......... 473
If the engine will not start .... 454
Ignition switch ..................... 146
Overheating ......................... 465
Engine compartment cover....... 367
Engine coolant
Capacity ............................... 477
Checking .............................. 372
Preparing and checking before
winter................................. 222
Engine coolant temperature
gauge ...................................... 161
Engine immobilizer system ........ 92
Engine oil
Capacity ............................... 475
Checking .............................. 369
Preparing and checking before
winter................................. 222
EPS ........................................... 206E

502
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What to do if...
What to do if...
A tire puncturesP. 444If you have a flat tire
The engine does not start
P. 454If the engine will not start
P. 9 2Engine immobilizer system
P. 462If the vehicle battery is discharged
The shift lever cannot be
moved out of PP. 456If the shift lever cannot be shifted
from P
The display on the engine
coolant temperature gauge
Steam can be seen coming
from under the hood
P. 465If your vehicle overheats
The key is lostP. 457If you lose your keys
The battery runs outP. 462If the vehicle battery is discharged
The doors cannot be lockedP. 5 4Doors
The horn begins to soundP. 9 7Alarm
The vehicle is stuck in mud or
sandP. 468If the vehicle becomes stuck