2010 Lexus IS F radiator cap

372
4-3. Do-it-yourself maintenance
10_IS F_U
Engine compartment
Battery (→P. 382)
Engine oil level dipstick (→P. 3 74 )
Engine oil filler cap (→P. 3 74 )
Brake fluid reservoir (→P. 380)
Fuse boxes ( →P. 4 0 8 )Washer fluid tank
(→P. 385)
Electric cooling fans
Condenser ( →P. 380)
Radiator ( →P. 380)
Engine coolant reservoir (→P. 3 7 8 )

379
4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS F_U
■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 your Lexus dealer test the cap and check for leaks in
the cooling system.
■Coolant 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
■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 burns or other injuries.
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.

484
5-2. Steps to take in an emergency
10_IS F_U
■Overheating
If you observe the following, your vehicle may be overheating.
●The engine coolant temperature gauge enters the red zone 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, causing 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 emer-
gency measure if engine coolant
is unavailable. (→P. 4 9 3 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6

534
Alphabetical index
10_IS F_U
Outside rear view mirrorsAdjusting and folding ......................... 67
Mirror position memory ................... 48
Outside temperature display.............147
Overhead console ................................ 312
Overhead courtesy lights
Overhead courtesy lights .............306
Wattage..................................................498
Overheating, Engine ...........................483
Parking assist sensors ............................ 171
Parking brake .......................................... 137
Parking lights Replacing light bulbs........................ 424
Switch ....................................................... 150
Wattage..................................................498
PCS ............................................................. 184
Personal lights Switch ..................................................... 308
Power outlet............................................ 324
Power windows ........................................ 69
Pre-collision system.............................. 184
Radar cruise control ...............................161
Radiator ................................................... 380
Radio ........................................................... 210
RDS ............................................................. 212
Rear turn signal lights
Replacing light bulbs........................ 424
Wattage..................................................498
Rear view mirror Compass ................................................. 341
Rear window de fogger.......................206 Replacing
Electronic key battery ..................... 406
Fuses........................................................ 408
Light bulbs .............................................424
Reporting safety defects for U.S. owners.......................................... 522
Safety connect ....................................... 345
Seat belts Adjusting the seat belt ....................... 58
Automatic locking retractor ........... 59
Child restraint system
installation ............................................106
Cleaning and maintaining
the seat belts .................................... 358
Emergency locking retractor......... 59
How to wear your seat belt .............57
How your child should wear
the seat belt.......................................... 60
Pregnant women,
proper seat belt use ........................ 59
Reminder light......................................444
Seat belt extenders.............................. 60
Seat belt pretensioners ..................... 58
Seat heaters ............................................ 325
Seat position memory............................ 52
Seating capacity....................................... 191
Seats Adjustment ............................................... 47
Adjustment precautions .................... 47
Child seats/child restraint system installation ............................106
Cleaning .................................................357
Driver’s seat position memory ...... 48
Front passenger seat position memory ..................................................52
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