2018 TOYOTA TUNDRA radiator cap

4857-3. Do-it-yourself maintenance
7
Maintenance and care
Engine compartment
Washer fluid tank (P. 494)
Engine oil level dipstick ( P. 486)
Engine coolant reservoir ( P. 488)
Engine oil filler cap ( P. 487)
Brake fluid reservoir ( P. 490) Fuse box (
P. 518)
Battery ( P. 492)
Radiator ( P. 490)
Cooling fan
Condenser ( P. 490)
Power steering fluid reservoir ( P. 491)1
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4897-3. Do-it-yourself maintenance
7
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-bora te 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 ca p, 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.
WARNING
■ When the engine is hot
Do not remove the radiator cap.( P. 587)
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 cor rect 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 p arts or paint.

5868-2. Steps to take in an emergency
The coolant level is satisfactory
if it is between the “FULL” and
“LOW” lines on the reservoir.Reservoir
“FULL”
“LOW”
Radiator cap
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 operate s 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 ins pected at the nearest Toyota dealer.
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5878-2. Steps to take in an emergency
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When trouble arises
WARNING
■When inspecting under th e 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 ho od 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 wh ile 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 sufficientl y. Adding
cool coolant to a hot engine too quickly can cause damage to th e engine.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sa nd or dust,
etc.).
● Do not use any coolant additives.

665Alphabetical index
Parking assist sensors (intuitive parking assist) ....... 270
Parking brake ........................... 205 Operation .............................. 205
Parking brake engaged
warning buzzer ................... 547
Parking brake engaged
warning message ............... 557
Parking lights ........................... 206 Light switch ........................... 206
Replacing light bulbs..... 527, 534
Wattage ................................ 609
PCS
(Pre-Collision System) .......... 231 Pre-collision brake assist ...... 232
Pre-collision braking ............. 232
PCS warning ......................... 232
Warning light ......................... 550
Warning message ................. 555
Pen holder ................................ 439
Personal lights ......................... 430 Light switch ........................... 430
Wattage ................................ 609
Power back window ................ 151
Power easy access system .... 128
Power outlets ........................... 452
Power steering fluid ................ 491
Power windows........................ 147 Jam protection function......... 148
Operation .............................. 147
Window lock switch............... 147
Pre-Collision System (PCS) ...................................... 231 Radar cruise control
(dynamic radar
cruise control) ....................... 252
Radiator .................................... 490
Radio ........................................ 340
Rear personal lights ................ 430
Rear seat
Adjustment precautions ........ 127
Child seats/child restraint system installation . ............... 60
Cleaning ............................... 473
Head restraints ..................... 132
Raising the bottom cushion ............................... 126
Rear side marker lights........... 206 Light switch ........................... 206
Replacing light bulbs ............ 532
Wattage ................................ 609
Rear step bumper .................... 122
Rear turn signal lights ............ 204
Replacing light bulbs ............ 532
Turn signal lever ................... 204
Wattage ................................ 609
Rear view mirror Inside rear view mirror .......... 139
Outside rear view mirrors ..... 142
Rear view monitor system ...... 277
Refueling .................................. 220 Capacity................................ 601
Fuel types ............................. 601
Opening the fuel tank cap..... 220
PR