2008 Lexus ES350 radiator cap

301
4-3. Do-it-yourself maintenance
4
Maintenance and care
ES350_U_(L/O_0708)
Engine compartment
Power steering fluid reservoir(→P. 310)
Engine oil filler cap (→P. 304)
Engine oil level dipstick (→P. 303)
Brake fluid reservoir (→P. 309)
Battery ( →P. 312)Fuse box ( →P. 3 3 4 )
Electric cooling fans
Condenser ( →P. 309)
Radiator ( →P. 309)
Washer fluid tank (→P. 315)
Engine coolant reservoir (→P. 3 0 7 )

308
4-3. Do-it-yourself maintenance
ES350_U_(L/O_0708)
■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 °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 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.

404
5-2. Steps to take in an emergency
ES350_U_(L/O_0708)
■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
●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.
Install the reservoir cap.
Make sure that the engine cool-
ant reservoir hose is positioned
as shown in the illustration.
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP7

449
Alphabetical index
ES350_U_(L/O_0708)
Outside rear view mirrorsAdjusting and folding ......................... 58
Mirror position memory ....................44
Outside temperature display............ 129
Overhead console .............................. 253
Overheating, Engine .......................... 403
Parking assist sensors ........................... 151
Parking brake ............................................121
Parking lights
Replacing light bulbs ....................... 345
Switch ........................................................ 132
Wattage ................................................... 417
PCS..............................................................160
Personal lights Switch ...................................................... 249
Power outlet ............................................262
Power steering fluid ..............................310
Power windows........................................ 60
Pre-collision system .............................. 160
Radar cruise control ............................. 142
Radiator.................................................... 309
Radio ................................................................ 192
Radio data system.................................. 193
RDS.............................................................. 193
Rear side marker lights Replacing light bulbs ....................... 343
Wattage ................................................... 417
Rear sunshade........................................266
Rear turn signal lights Replacing light bulbs ....................... 343
Wattage ................................................... 417
Rear window defogger ........................189 Replacing
Electronic key battery ...................... 332
Fuses.........................................................334
Light bulbs .............................................343
Reporting safety defects for U.S.A. owners .....................................440
Seat belts Adjusting the seat belt ..........................51
Automatic Locking Retractor......... 52
Child restraint system installation.............................................. 96
Cleaning and maintaining the seat belts .................................... 286
Emergency Locking Retractor ...... 52
How to wear your seat belt ............ 50
How your child should wear the seat belt .......................................... 53
Pregnant women, proper seat belt use ......................... 52
Reminder light .....................................364
Seat belt extenders .............................. 53
Seat belt pretensioners ........................51
Seat heaters ............................................ 263
Seat position memory ............................ 47
Seat ventilators ...................................... 263
Seating capacity ..................................... 166
Seats
Adjustment ............................................... 43
Adjustment precautions .................... 43
Child seats/child restraint system installation.............................. 96
Cleaning ................................................ 285
Driver’s seat position memory ....... 44
Front passenger seat position memory .................................................. 47
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