2010 Lexus ES350 radiator cap

373
4-3. Do-it-yourself maintenance
4
Maintenance and care
ES350_U
Engine compartment
Power steering fluid reservoir(oP. 381)
Engine oil filler cap (oP. 3 76 )
Engine oil level dipstick (oP. 3 7 5 )
Brake fluid reservoir (oP. 380)
Battery ( oP. 383)Fuse box ( oP. 4 0 6 )
Electric cooling fans
Condenser ( oP. 380)
Radiator ( oP. 380)
Washer fluid tank (oP. 386)
Engine coolant reservoir (oP. 378)

379
4-3. Do-it-yourself maintenance
4
Maintenance and care
ES350_U
■If 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.
■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.USA: “Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deionized water. (Enabled: -31 qF [-35 qC])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45%
deionized water. (Enabled: -44 qF [-42 qC])
For more details about engine coolant, contact your Lexus dealer.
CAUTION
■When 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
■When adding engine coolant
Coolant is neither plain water not straight antifreeze. The correct mixture of water
and anti freeze 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.

482
5-2. Steps to take in an emergency
ES350_U
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 fan and other belts while the engine is
running.
●Do not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam released
under pressure.
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.

534
Alphabetical index
ES350_U
Parking assist sensors .......................... 165
Parking brake .......................................... 132
Parking lightsSwitch ........................................................145
Wattage.................................................. 495
PCS ..............................................................176
Personal lights Switch ....................................................... 310
Wattage.................................................. 495
Power outlet............................................323
Power steering fluid .............................. 381
Power windows ........................................68
Pre-collision system...............................176
Radar cruise control ............................. 155
Radiator ................................................... 380
Radio ...................................................................211
Radio data system ................................. 212
RDS ............................................................. 212
Rear side marker lights
Replacing light bulbs.......................... 417
Wattage.................................................. 495
Rear sunshade ....................................... 329
Rear turn signal lights Replacing light bulbs.......................... 417
Wattage.................................................. 495
Rear window de fogger....................... 207
Replacing
Electronic key battery......................404
Fuses ........................................................406
Light bulbs............................................... 417
Reporting safety defects for
U.S. owners .......................................... 522 Safety Connect ..................................... 346
Seat belts
Adjusting the seat belt ....................... 59
Automatic Locking Retractor ........ 60
Child restraint system installation ............................................105
Cleaning and maintaining the seat belts .................................... 358
Emergency Locking Retractor ..... 60
How to wear your seat belt ............ 58
How your child should wear the seat belt............................................ 61
Pregnant women, proper seat belt use ........................ 60
Reminder light....................................... 441
Seat belt extenders................................ 61
Seat belt pretensioners ..................... 59
Seat heaters .................................324, 326
Seat position memory............................ 54
Seat ventilators ...................................... 326
Seating capacity..................................... 183
Seats
Adjustment ...............................................49
Adjustment precautions ....................49
Child seats/child restraint system installation ............................105
Cleaning .................................................357
Driver’s seat position memory ...... 50
Front passenger seat position memory ..................................................54
Head restraint ........................................ 56
Properly sitting in the seat................ 83
Seat heaters ..........................................326
Ventilated seats...................................326
Service reminder indicators .............136P
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