2016 TOYOTA TUNDRA radiator cap

4147-3. Do-it-yourself maintenance
Engine compartment
Washer fluid tank (P. 423)
Engine oil level dipstick ( P. 415)
Engine coolant reservoir ( P. 417)
Engine oil filler cap ( P. 416)
Brake fluid reservoir ( P. 419) Fuse box (
P. 443)
Battery ( P. 421)
Radiator ( P. 419)
Cooling fan
Condenser ( P. 419)
Power steering fluid reservoir ( P. 420)1
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4187-3. 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 coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir cap, drain cock
and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling system.
CAUTION
■ When the engine is hot
Do not remove the radiator cap.( P. 505)
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 stra ight 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 from damaging parts or paint.

505
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When trouble arises
8-2. Steps to take in an emergency
If your vehicle overheats
●The needle of the engine coolant temperature gauge ( P. 8 8 )
enters the red zone or a loss of engine power is experienced. (For
example, the vehicle sp eed does not increase.)
● “ENGINE COOLANT OVERTEMP” is shown on the multi-informa-
tion display.
● Steam comes out from under the hood.
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, and then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled
down sufficient ly, inspect the
hoses and radiator core (radia-
tor) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The coolant level is satisfactory
if it is between the “FULL” and
“LOW” lines on the reservoir.Reservoir
“FULL”
“LOW”
Radiator cap
The following may indicate that your vehicle is overheating:
Correction procedures
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4
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5068-2. Steps to take in an emergency
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the engine to check that the radiator cooling fan operates and
to check for coolant leaks from the radiator or hoses.
If the fan is not operating:
Stop the engine immediately and contact your Toyota dealer.
If the fan is operating:
Have the vehicle inspected at the nearest Toyota dealer.
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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 away from the fans, etc., while the engine is run-
ning.
● Do not loosen the radiator cap and the coolant reservoir cap while the
engine and radiator 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.
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582Alphabetical index
Radiator .................................... 419
Radio......................................... 271
Rear personal lights ................ 362
Rear seat Adjustment precautions ........ 115
Child seats/child restraint system installation ................ 60
Cleaning................................ 402
Head restraints ..................... 120
Raising the bottom cushion ............................... 114
Rear side marker lights ........... 191 Light switch ........................... 191
Replacing light bulbs............. 457
Wattage ................................ 528
Rear step bumper .................... 110
Rear turn signal lights............. 189
Replacing light bulbs............. 457
Turn signal lever ................... 189
Wattage ................................ 528
Rear view mirror Inside rear view mirror .......... 127
Outside rear view mirrors...... 130
Rear view monitor system ...... 211
Refueling .................................. 198 Capacity ................................ 520
Fuel types ............................. 520
Opening the fuel tank cap ..... 198
Replacing Fuses .................................... 443
Light bulbs ............................ 446
Tires ...................................... 484
Wireless remote control battery ................................ 441
Reporting safety defects for U.S. owners ...................... 550
Resetting the message
indicating maintenance
is required .............................. 406 Seat belts ................................... 32
Adjusting the seat belt ............ 33
Automatic Locking Retractor .............................. 34
Child restra int system
installation ............................ 60
Cleaning and maintaining
the seat belt........................ 403
Emergency Locking Retractor .............................. 34
How to wear your seat belt ..... 32
How your child should wear the seat belt.......................... 34
Pregnant women, proper seat belt use ......................... 35
Reminder light and buzzer.... 474
Seat belt extender .................. 34
Seat belt pretensioners........... 33
SRS warning light ................. 473
Seat heaters ............................. 358
Seat position memory ............. 116
Seat ventilators........................ 358
Seating capacity ...................... 156
Seats, Front.............................. 111 Adjustment............................ 111
Adjustment precautions ........ 113
Child seats/child restraint system installation ................ 60
Cleaning ............................... 402
Driving position memory ....... 116
Head restraints ..................... 120
Power easy access system .......... ...................... 116
Properly sitting in the seat ...... 30
Seat heaters ......................... 358
Seat position memory ........... 116
Seat ventilators ..................... 358
RS