2023 TOYOTA HILUX coolant reservoir

4867-3. Do-it-yourself maintenance
HILUX_OM_OM0K789E_(EE)
Engine compar tment
Gasoline engine
Engine coolant reservoir
( P. 492)
Engine oil level dipstick
( P. 489)
Engine oil filler cap ( P. 490)
Fuse box ( P. 520)
Battery ( P. 494)
Washer fluid tank ( P. 498)
Condenser ( P. 493)
Radiator ( P. 493)
1
2
3
4
5
6
7
8

4877-3. Do-it-yourself maintenance
HILUX_OM_OM0K789E_(EE)
7
Maintenance and care
Diesel engine (vehicles without water-cooled intercooler)
Engine coolant reservoir
( P. 492)
Engine oil filler cap ( P. 490)
Engine oil level dipstick
( P. 489)
Fuel filter ( P. 499, 614)
Fuse box ( P. 520)
Battery ( P. 494)
Washer fluid tank ( P. 498)
Intercooler ( P. 493)
Condenser (if equipped)
( P. 493)
Radiator ( P. 493)
1
2
3
4
5
6
7
8
9
10

4887-3. Do-it-yourself maintenance
HILUX_OM_OM0K789E_(EE)
Diesel engine (vehicles with water-cooled intercooler)
Engine coolant reservoir
( P. 492)
Engine oil filler cap ( P. 490)
Engine oil level dipstick
( P. 489)
AdBlue™ tank cap ( P. 500)
Fuel filter ( P. 499, 614)
Fuse box ( P. 520)
Battery ( P. 494)
Washer fluid tank ( P. 498)
Intercooler coolant reservoir
( P. 492)
Intercooler cooling radiator
( P. 493)
Condenser (if equipped)
( P. 493)
Radiator ( P. 493)
1
2
3
4
5
6
7
8
9
10
11
12

4927-3. Do-it-yourself maintenance
HILUX_OM_OM0K789E_(EE)
The coolant level is satisfactory if it is between the “F” and “L” lines on
the reservoir when the engine is cold.
■Engine coolant reservoir
If the level is on or below the “L” line, add coolant up to the “F” line.
( P. 610)
■Intercooler coolant reservoir (if equipped)
Reservoir cap
“F” line
“L” line
If the level is on or below the “L”
line, add coolant up to the “F”
line. ( P. 610)
■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.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deion-
ized water. (Minimum temperature: -35 C [-31F])
For more details about engine coolant, contact any authorized Toyota retailer
or Toyota authorized repairer, or any reliable repairer.
Coolant
Gasoline engineDiesel engine
Reservoir cap
“F” line
“L” line1
2
3
1
2
3

4937-3. Do-it-yourself maintenance
HILUX_OM_OM0K789E_(EE)
7
Maintenance and care
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir cap, intercooler
coolant reservoir cap (if equipped), drain cock and water pump. If you cannot
find a leak, have any authorized Toyota retailer or Toyota authorized repairer,
or any reliable repairer test the cap and check for leaks in the cooling system.
Check the radiator, condenser and intercooler coolant radiator/inter-
cooler and clear away any foreign objects. If any of the above parts is
extremely dirty or you are not sure of their condition, have your vehi-
cle inspected by any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
WARNING
■ When the engine is hot
Do not remove the radiator cap (if equipped), the engine coolant reservoir
cap or intercooler coolant reservoir cap (if equipped).
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 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.
■ Notice on coolant quality
Do not use improper coolant. If improper coolant is used, the engine cooling
system may be damaged.
Radiator, condenser and intercooler coolant radiator/intercooler
(if equipped)
WARNING
■ When the engine is hot
Do not touch the radiator, condenser or intercooler coolant radiator/inter-
cooler as they may be hot and cause serious injuries, such as burns.

6118-2. Steps to take in an emergency
HILUX_OM_OM0K789E_(EE)
8
When trouble arises
The coolant level is satisfactory if it is between the “F” and “L” lines
on the reservoir.
4
Reservoir
“F” line
“L” line
Radiator cap (if equipped)
1
2
3
4
Engine coolant (gasoline
engine)
Engine coolant (diesel engine)
Intercooler coolant (if equipped)

6138-2. Steps to take in an emergency
HILUX_OM_OM0K789E_(EE)
8
When trouble arises
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 any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
If the fan is operating:
Have the vehicle inspected at the nearest authorized Toyota retailer
or Toyota authorized repairer, or any reliable repairer.
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 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 serious injury.
● Do not loosen the radiator cap (if equipped), the engine coolant reservoir
cap or intercooler coolant reservoir cap (if equipped) 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 additive.
6
7