2016 Lexus GX460 radiator cap

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GX460_OM_OM60M73U_(U)6-3. Do-it-yourself maintenance
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Maintenance and care
Engine compartment
Power steering fluid reservoir
(P. 4 6 3 )
Engine oil level dipstick (P. 4 5 7 )
Engine oil filler cap ( P. 4 5 8 )
Brake fluid reservoir ( P. 4 6 1 )
Fuse box ( P. 4 8 6 ) Battery
( P. 464)
Radiator ( P. 4 6 1 )
Condenser ( P. 4 6 1 )
Cooling fans
Engine coolant reservoir (P. 4 5 9 )
Wa s h e r f l u i d t a n k ( P. 4 6 7 )1
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460
GX460_OM_OM60M73U_(U)6-3. Do-it-yourself maintenance
■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 mixture of 50 % coolant and 50 % deion-
ized water. (Minimum temperature: -31 F [-35 C])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55 % coolant and 45% deion-
ized water. (Minimum temperature: -44 F [-42C])
For more details about engine 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 Le xus 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 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 pr event it from damage to parts or paint.

5577-2. Steps to take in an emergency
GX460_OM_OM60M73U_(U)
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When trouble arises
The coolant level is satisfactory if it is between the “F” and “L” lines on the res-
ervoir. Reservoir
“F”
“L”
Radiator cap
Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
Start the engine and turn the air conditioning system on to check that the radi-
ator cooling fans operate and to check for coolant leaks from the radiator or
hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are oper ating by checking the fan sound and air flow.
If it is difficult to check th ese, turn the air conditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
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5587-2. Steps to take in an emergency
GX460_OM_OM60M73U_(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 hood, 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 coolant 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 cooled 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 foreign matter (such as sand or dust etc.).
●Do not use any coolant additives.

625Alphabetical index
GX460_OM_OM60M73U_(U)
Power outlet ............................................. 417
Power windows .......................................146Jam protection function ....................147
Operation ............................................... 146
Window lock switch.......................... 146
Pre-Collision System (PCS) ............ 362 Function ..................................................362
PCS OFF switch ................................363
Warning light ........................................ 513
Radiator ......................................................461
Radio
*
Rear seat ................................................... 120 Adjustment ............................................. 120
Rear turn signal lights ...........................194 Replacing light bulbs ....................... 496
Turn signal lever .................................. 194
Wattage ................................................... 571
Rear view mirror Inside rear view mirror ....................... 141
Outside rear view mirrors .............. 143
Rear view monitor system .................247
Rear window defogger ......................385
Rear window wiper................................. 211
Refueling ....................................................214 Capacity ................................................ 564
Fuel types .................................... 214, 564
Opening the fuel tank cap.............. 216 Replacing
Electronic key battery ..................... 484
Fuses ........................................................486
Light bulbs...............................................491
Tires .......................................................... 534
Wireless remote control battery .................................................. 484
Reporting safety defects for U.S. owners .................................. 600
Reset the maintenance data ............ 445
Safety connect........................................432
Seat belts .................................................... 28 Adjusting the seat belt........................ 29
Automatic Locking Retractor ........ 30
Child restraint system installation ............................................. 57
Cleaning and maintaining the seat belt ....................................... 442
Emergency Locking Retractor................................................ 30
How to wear your seat belt............. 28
How your child should wear the seat belt .......................................... 30
Pregnant women, proper seat belt use........................... 31
Reminder light and buzzer .............514
Seat belt pretensioners ...................... 29
Seat belt extender ................................ 30
SRS warning light ................................ 512
R
S
*:For vehicles with a navigation system or a multimedia system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.