2019 Lexus GS F radiator cap

376
GS F_OM_OM30G90U_(U)6-3. Do-it-yourself maintenance
Engine compartment
GS350
Fuse boxes (
P. 412)
Battery ( P. 390)
Engine oil level dipstick (P. 381)
Engine coolant reservoir (P. 386)
Engine oil filler cap ( P. 383) Brake fluid reservoir
(P. 389)
Washer fluid tank ( P. 392)
Electric cooling fans
Condenser ( P. 388)
Radiator ( P. 388)1
2
3
4
5
6
7
8
9
10

GS F_OM_OM30G90U_(U)
3776-3. Do-it-yourself maintenance
6
Maintenance and care
GS300
Fuse boxes (P. 412)
Battery ( P. 390)
Intercooler coolant reservoir (P. 386)
Engine oil level dipstick (P. 381)
Engine oil filler cap ( P. 383) Engine coolant reservoir
(P. 386)
Brake fluid reservoir (P. 389)
Washer fluid tank ( P. 392)
Condenser ( P. 388)
Electric cooling fans
Radiator ( P. 388)1
2
3
4
5
6
7
8
9
10
11

378
GS F_OM_OM30G90U_(U)6-3. Do-it-yourself maintenance
GS F
Fuse boxes (
P. 412)
Battery ( P. 390)
Engine oil level dipstick (P. 381)
Engine coolant reservoir (P. 386)
Engine oil filler cap ( P. 383) Brake fluid reservoir
(P. 389)
Washer fluid tank ( P. 392)
Electric cooling fans
Condenser ( P. 388)
Radiator ( P. 388)1
2
3
4
5
6
7
8
9
10

GS F_OM_OM30G90U_(U)
3876-3. Do-it-yourself maintenance
6
Maintenance and care
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a 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 mixt ure of 50% coolant and 50% deionized water.
(Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Cool ant” is a mixture of 55% coolant and 45% deionized water.
(Minimum temperature: -44 F [-42C])
For more details about coolant, contact your Lexus dealer.
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir caps, drain cock and water
pump.
If you cannot find a leak, have your Lexus de aler test the cap and check for leaks in the
cooling system.
WARNING
■When the engine is hot
Do not remove the engine coolant reservoir cap, the intercooler coolant reservoir cap
or the coolant inlet cap. ( P. 513)
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 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 cool-
ing. Be sure to read the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.

5137-2. Steps to take in an emergency
GS F_OM_OM30G90U_(U)
7
When trouble arises
WARNING
■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.
●GS350: Do not loosen the coolant inlet cap
or the engine coolant reservoir cap while the
engine and radiator are hot.
High temperature steam or coolant could
spray out.
●GS F: Do not loosen the engine coolant res-
ervoir cap while the engine and radiator are
hot.
High temperature steam or coolant could
spray out.
●GS300: Do not loosen the coolant inlet cap,
the engine coolant rese rvoir cap or the inter-
cooler coolant reservoir cap while the engine
and radiator are hot.
High temperature steam or coolant could
spray out.

591Alphabetical index
GS F_OM_OM30G90U_(U)
Radar cruise control (dynamic radar cruise control with
full-speed range) ............................... 259
Radiator ....................................................388
Radio
*
RBDS (Radio Broadcast Data Systems)
*
Rear air conditioning system .............321
Rear door sunshades ............................341
Rear personal lights............................. 330
Rear side marker lights ........................216 Light switch ............................................ 216
Replacing light bulbs ........................420
Welcome light illumination control ......................... 138
Rear seat heaters.................................. 325
Rear sunshade .........................................341 Operation ............................................... 341
Reverse operation feature............. 342 Rear turn signal lights ........................... 210
Replacing light bulbs ....................... 420
Turn signal lever ...................................210
Rear view mirror Inside rear view mirror......................169
Outside rear view mirrors ................ 171
Rear view monitor system
*
Rear window defoggers ...................... 316
Refueling.................................................. 228 Capacity................................................... 521
Fuel types................................................. 521
Opening the fuel tank cap ............ 229
When the fuel filler door cannot be opened ......................... 230
Remote Touch
*.................................... 304
Replacing Electronic key battery .......................410
Fuses .......................................................... 412
Light bulbs...............................................418
Tires ...........................................................472
Rev indicator .....................................88, 95
Rev peak ............................................. 88, 96
Reporting safety defects for U.S. owners .................................. 562
Resetting the message indicating maintenance is required ................ 366
R
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.