2018 TOYOTA TUNDRA cooling

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.
4
1
2
3
4
5
6
7

5878-2. Steps to take in an emergency
8
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.

6049-1. Specifications
Cooling system
Capacity
1UR-FE
engine
Vehicles without towing package
11.4 qt. (10.8 L, 9.5 Imp.qt.)
Vehicles with towing package
12.6 qt. (11.9 L, 10.5 Imp.qt.)
3UR-FE,
3UR-FBE
enginesVehicles without towing package
11.4 qt. (10.8 L, 9.5 Imp.qt.)
Vehicles with towing package
12.4 qt. (11.7 L, 10.3 Imp.qt.)
Coolant typeUse either of the following.
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-
based non-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 pl ug gap.

659Alphabetical index
Installing CRS with top tether strap ........ 67, 70
Child safety ................................ 55
Airbag precautions .................. 42
Battery precautions ............... 584
Child restraint system ............. 56
How your child should wear the seat belt ................. 34
Installing child restraints ......... 60
Moon roof precautions .......... 157
Power back window precautions ......................... 153
Power window lock switch .... 147
Power window precautions ... 149
Rear door child-protector ...... 116
Removed wireless remote
control battery
precautions ......................... 517
Seat belt extender
precautions ........................... 37
Seat belt precautions .............. 59
Seat heater precautions........ 427
Child-protectors....................... 116
Cleaning ........................... 470, 473 Aluminum wheels.................. 471
Exterior ................................. 470
Interior................................... 473
Seat belts .............................. 474
Clock ......................................... 451
Compass .................................. 465
Condenser ................................ 490
Console box ............................. 435
Coolant ..................................... 488 Capacity ................................ 604
Checking ............................... 488
Preparing and checking before winter....................... 312
Cooling system ........................ 488 Engine overheating ............... 585
CRS ............................................. 56 Cruise control
Cruise control ....................... 266
Dynamic radar cruise control ...................... 252
Cup holders ............................. 442
Curtain shield airbags............... 39
Customizable features ............ 624
Daytime running light system.................................... 209
Deck hooks .............................. 449
Defogger Back window................. 414, 421
Outside rear view mirrors ........................ 414, 421
Windshield .................... 414, 421
Differential................................ 605
Dimensions .............................. 592
Dinghy towing.......................... 194
Display Drive information .................. 101
Dynamic radar
cruise control ...................... 252
LDA
(Lane Departure Alert) ....... 244
Multi-information display ....... 100
Trip information..................... 100
Warning message................. 555
Do-it-yourself maintenance .... 482
D