2019 Lexus GX460 cooling

5647-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
CAUTION
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the h ood, do not open the hood until the steam
has subsided. The engine compartment may be very hot.
●Keep hands and clothing (especially a tie, a scarf or a muffler) away from the fans and
belts. Failure to do so may cause the hands or clothing to be caught, resulting in seri-
ous injury.
●Do not loosen the radiator cap or the cool ant reservoir cap while the engine and radi-
ator are hot. High temperature steam or coolant could spray out.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cool ed down sufficiently. Adding cool coolant
to a hot engine too quickly can cause damage to the engine.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreig n matter (such as sand or dust etc.).
●Do not use any coolant additive.

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GX460_OM_OM60Q84U_(U)8-1. Specifications
Cooling system
Capacity
(reference)With rear heater16.3 qt. (15.4 L, 13.6 Imp.qt.)
Without rear heater14.5 qt. (13.7 L, 12.1 Imp.qt.)
Coolant typeUse either of the following:
• “Toyota Super Long Life Coolant”
• A similar high-quality ethylene glycol-basednon-silicate, non-amine, non-nitrite, and
non-borate coolant with long-life hybrid
organic acid technology
Do not use plain water alone.
Ignition system (spark plug)
MakeDENSO SK20HR11
Gap0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

626Alphabetical index
GX460_OM_OM60Q84U_(U)
Condenser .............................................. 467
Console box ............................................ 410
Cool box .................................................. 423
Cooling system ..................................... 465Engine overheating...........................562
Conversation mirror ........................... 426
Crawl Control .......................................350
Cruise control Cruise control...................................... 229
Dynamic radar cruise control...... 232
Cup holders .............................................. 412
Curtain shield airbags ........................... 36
Current fuel consumption .....................91
Customizable features ....................... 592
DAC (Downhill Assist Control system)................................................... 353
Daytime running light system ..........208
Defogger Front windshield .................................394
Outside rear view mirrors ............ 395
Rear window ....................................... 395
Differential ............................................... 573
Dimension ............................................... 568
Display Multi-information display ..................90
Trip information .......................................91
Warning message .............................526
Do-it-yourself maintenance ............. 457
Doors.......................................................... 102 Back door ............................................... 109
Door glasses ......................................... 154
Door lock ................................................ 102
Open door warning light.............. 520
Outside rear view mirrors ................ 151
Rear door child-protector.............. 105 Driver’s seat position memory.......... 139
Driving ........................................................ 162
AVS switch ........................................... 345
Break-in tips ...........................................163
Correct posture .................................... 28
Procedures ............................................. 162
Winter drive tips ................................. 381
Dynamic radar cruise control ..........232
Eco Driving Indicator .............................94
EDR (Event data recorder)................... 10
Electronic key ........................................... 98 Battery-saving function ......................121
If the electronic key does not operate properly ............................556
Replacing the battery ......................489
Emergency, in case of If the electronic key does not operate properly ............................556
If the engine will not start ...............554
If the vehicle has discharged battery ........................559
If the warning buzzer sounds .................................................. 518
If the warning light turns on ........... 518
If you have a flat tire ..........................540
If you lose your keys......................... 620
If you think something is wrong.....................................................516
If your vehicle becomes stuck......................................................565
If your vehicle needs to be towed .................................................... 510
If your vehicle overheats ................ 562
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