coolant reservoir Lexus IS350 2020 Owner's Manual / LEXUS 2020 IS300,IS350 OWNER'S MANUAL (OM53F29U)

4737-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U
IS350 AWD/IS350/IS300 AWD
Engine compartment
Fuse boxes (P. 504)
Battery ( P. 482)
Engine oil level dipstick (P. 475)
Engine coolant reservoir (P. 478)
Engine oil filler cap ( P. 476)Brake fluid reservoir (
P. 481)
Washer fluid tank ( P. 484)
Electric cooling fans
Condenser ( P. 480)
Radiator ( P. 480)1
2
3
4
5
6
7
8
9
10

4747-3. Do-it-yourself maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U
IS300
Fuse boxes ( P. 504)
Battery ( P. 482)
Intercooler
Engine oil level dipstick (P. 475)
Engine oil filler cap ( P. 476)
Engine coolant reservoir (P. 478) Brake fluid reservoir (
P. 481)
Washer fluid tank ( P. 484)
Electric cooling fans
Condenser ( P. 480)
Intercooler radiator ( P. 478)
Radiator ( P. 480)
Intercooler coolant reservoir (P. 478)1
2
3
4
5
6
7
8
9
10
11
12
13

4787-3. Do-it-yourself maintenance
IS350 AWD/IS350/IS300 AWD/IS300_U
■Engine coolant reservoir
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on
the reservoir when the engine is cold.
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW” lin e, add coolant up to the “FULL” line.
(  P. 579)
■Intercooler coolant reservoir (IS300)
The coolant level is satisfactory if it is between the “F” and “L” lines on the res-
ervoir when the engine is cold.
Reservoir cap
“F” line
“L” line
If the level is on or below the “L” line,
add coolant up to the “F” line.
( P. 579)
Coolant
IS350 AWD/IS350/
IS300 AWDIS300
1
2
3
1
2
3

4797-3. Do-it-yourself maintenance
7
Maintenance and care
IS350 AWD/IS350/IS300 AWD/IS300_U
■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 mixt ure of 50% coolant and 50% deionized water.
(Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Cool ant” is a mixture of 55% coolant and 45% deionized 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 cap, drain cock and water
pump.
If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in the
cooling system.
WARNING
■When the engine is hot
Do not remove the engine coolant reservoir cap, intercooler coolant reservoir cap
(IS300), or coolant inlet cap. ( P. 582)
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 prevent it from damaging parts or paint.

5808-2. Steps to take in an emergency
IS350 AWD/IS350/IS300 AWD/IS300_U
Engine coolant reservoir:
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on
the reservoir.
Reservoir cap
“FULL” line
“LOW” line
Intercooler coolant reservoir (IS300):
The coolant level is satisfactory if it is between the “F” and “L” lines on the reser-
voir.
Reservoir cap
“F” line
“L” line4
IS350 AWD/IS350/IS300 AWDIS300
1
2
3
1
2
3

5828-2. Steps to take in an emergency
IS350 AWD/IS350/IS300 AWD/IS300_U
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 h ood, 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.
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 foreig n matter (such as sand or dust etc.).
●Do not use any coolant additive.
●IS350 AWD/IS350/IS300 AWD: Do notloosen the coolant inlet cap or coolant reser-
voir cap while the engine and radiator are hot.
(The coolant inlet cap is located under the
engine cover.)
High temperature steam or coolant could
spray out.
●IS300: Do not loosen the coolant inlet cap,
coolant reservoir cap, or intercooler reser-
voir cap while the engine and radiator are hot.
High temperature steam or coolant could
spray out.