2012 Lexus GX460 radiator cap

609
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_U.S.A. (OM60J00U)
Engine compartment
Engine coolant reservoir(→P. 6 1 6 )
Engine oil level dipstick (→P. 6 1 1 )
Engine oil filler cap (→P. 6 1 2 )
Brake fluid reservoir (→P. 6 1 9 )Fuse box ( →P. 6 4 7 )
Battery ( →P. 623)
Radiator ( →P. 6 1 8 )
Condenser ( →P. 6 1 8 )
Electric cooling fan
Washer fluid tank ( →P. 6 2 7 )
Power steering fluid reservoir (→P. 621)

617
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_U.S.A. (OM60J00U)
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, engine coolant reservoir caps, 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.
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 serious injuries, such as burns.
NOTICE
■When adding the 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 it damage to parts or paint.

746
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
■Overheating
In the following situations, 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 fan and engine drive belt 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 coolant.
When adding coolant, do so slowly. Adding cold coolant to a hot engine too quickly
can cause damage to the engine.

827
Alphabetical index
GX460_U.S.A. (OM60J00U)
Personal lightsPersonal lights.......................................519
Switch ........................................................ 521
Wattage ................................................. 763
Power steering Fluid ............................................................ 621
Power outlet ................................ 542, 544
Power windows........................................ 101
Pre-Collision System.......................... 343
Radar cruise control ........................... 250
Radiator......................................................618
Radio ........................................................... 415
RDS (Radio Date System).................. 417
Rear height control air suspension ....................................... 316
Rear seat Adjustment ...............................................67
Folding down the second seatbacks ..................................... 69, 70
Folding down the third seats ........... 72
Rear side marker lights
Replacing light bulbs ....................... 669
Wattage ................................................. 763
Rear step bumper ....................................54
Rear turn signal lights Replacing light bulbs ....................... 669
Wattage ................................................. 763
Rear view mirror Compass ............................................... 575
Rear view monitor system ..................281
Rear window defogger
*.......................411
Rear window wiper and washer .....242 Replacing
Electronic key battery ......................644
Fuses......................................................... 647
Light bulbs .............................................662
Tires ............................................................ 721
Reporting safety defects for
U.S. owners ......................................... 804
Scuff lighting ............................................ 519
Seat belts Adjusting the seat belt ........................86
Automatic Locking Retractor......... 87
Child restraint system installation.............................................. 151
Cleaning and maintaining the seat belts .................................... 594
Emergency Locking Retractor ................................................ 87
How to wear your seat belt ............ 85
How your child should wear the seat belt ......................................... 88
Pre-collision seat belts ....................... 87
Pregnant women, proper seat belt use ........................ 88
Reminder light .....................................692
Seat belt extenders ..............................89
Seat belt pretensioners ......................90
Seat heaters ............................................. 551
Seat position memory ............................ 78
Seat ventilator ......................................... 551
Seating capacity .................................... 364
R
S
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.