2015 LEXUS LX570 cooling

7494-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L96U_(U) CAUTIONThe engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury
observe the following precautions. ■
When working on the engine compartment ●
Keep hands, clothing and t ools away from the moving fa ns and engine drive belt.●
Be careful not to touch the engine, radiator, exhaust mani fold, etc. right after driv-
ing as they may be hot. Oil and other fluids may also be hot. ●
Do not leave anything that may burn easily, such as paper or rags, in the engine
compartment. ●
Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable. ●
Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.■
When working near the electric cooling fan or radiator grille
Be sure the “ENGINE START STOP” switch is OFF.
With the “ENGINE START ST OP” switch in IGNITION ON mode, the electric
cooling fan may automatically start to run if the air conditioning is on and/or the
coolant temperature is high. (  P. 758)■
When working on or under the vehicle ●
Do not get under the vehicle with just the jack supporting it.
Always use automotive jack st ands or other solid supports.●
Use eye protection to prevent flying or falling material, fluid spray, etc. from get-
ting in your eyes.
NOTICE■
If you remove the air cleaner filter
Driving with the air cleaner removed may cause excessive engine wear due to dirt
in the air.

7514-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L96U_(U) Engine compartment
Power steering fluid reservoir
(  P. 761)
Engine oil level dipstick
(  P. 753)
Engine oil filler cap
(  P. 754)
Brake fluid reservoir
(  P. 759) Fuse box (  P. 786)
Washer fluid tank (  P. 765)
Battery (  P. 762)
Cooling fans
Condenser (  P. 758)
Radiator (  P. 758)
Engine coolant reservoir
(  P. 757)

7574-3. Do-it-yourself maintenance
4
Maintenance and care
LX570_OM_OM60L96U_(U) Engine coolant
The coolant level is satisfactory if it is between the “F” and “L” lines on the
reservoir when the engine is cold.
Reservoir cap
“F”
“L” If the level is on or below the “L”
line, add coolant up to the “F” line.
■
If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, reservoi r cap, radiator 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. ■
Coolant selection
Only use “Toyota Super Long Life Coolant” or 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%
deionized water. (Enabled: -31  F [-35  C])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45%
deionized water. (Enabled: -44  F [-42  C])
For more details about engine coolant, contact your Lexus dealer.

7584-3. Do-it-yourself maintenance
LX570_OM_OM60L96U_(U) Radiator and condenser
Check the radiator and condenser, and clear any foreign objects.
If any of the above parts are extremely dirty or you are not sure of their
condition, have your vehicle checked by your Lexus dealer. CAUTION■
When the engine is hot
Do not remove the coolant reservoir cap.
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 engine coolant
Coolant is neither plain wate r nor straight antifreeze. Th e 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 damage to parts or paint.
CAUTION■
When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause serious inju-
ries, such as burns.

8785-2. Steps to take in an emergency
LX570_OM_OM60L96U_(U) CAUTION■
Avoiding battery fires or explosions
Observe the following precautions to prev ent accidentally igni ting the flammable
gas that may be emitted from the battery. ●
Make sure the jumper cable is connected to the correct terminal and that it is not
unintentionally in contact with any pa rt other than the intended terminal.●
Do not allow the jumper cables to come into contact with the “+” and “-” termi-
nals. ●
Do not allow open flame or use matches, cigarette lighters or smoke near the
battery.■
Battery precautions
The battery contains poisonou s and corrosive acidic electrolyte, while related parts
contain lead and lead compounds. Obse rve the following precautions when han-
dling the battery. ●
When working with the battery, always we ar safety glasses and take care not to
allow any battery fluids (acid) to come into contact with skin, clothing or the vehi-
cle body. ●
Do not lean over the battery. ●
In the event that battery fluid comes into contact with the skin or eyes, immedi-
ately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affe cted area until medi cal attention can be
received. ●
Always wash your hands after handling th e battery support, terminals, and other
battery-related parts. ●
Do not allow children near the battery.
NOTICE■
When handling jumper cables
Be careful that the jumper cables do not become tangled in the cooling fan or any
of the belts when connectin g or disconnecting them.

5
When trouble arises
8795-2. Steps to take in an emergency
LX570_OM_OM60L96U_(U) If your vehicle overheats
Correction procedures
Stop the vehicle in a safe place and turn off the air conditioning
system, 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
sufficiently, inspect the hoses and
radiator core (radiator) for any
leaks.
Radiator
Cooling fans If a large amount of coolant leaks,
immediately contact your Lexus
dealer.The following may indicate that your vehicle is overheating.
● The needle of the engine coolant temperature gauge (  P. 192)
enters the red zone or a loss of engine power is experienced.
(For example, the vehicle speed does not increase.)
● Steam is coming from under the hood. STEP 1
STEP 2
STEP 3

5
When trouble arises
8815-2. Steps to take in an emergency
LX570_OM_OM60L96U_(U) CAUTION■
To prevent an accident or injury when inspecting under the hood of your vehicle ●
If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engi ne compartment may be very hot, causing serious
injury such as burns. ●
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 or the coolant reservoir cap while the engine and
radiator are hot.
Serious injury, such as bu rns, may result from hot coolant and steam released
under pressure.
NOTICE■
When adding engine coolant
Wait until the engine has cooled down before adding engine coolant.
When adding coolant, do so slowly. 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.

8916-1. Specifications
6
Vehicle specifications
LX570_OM_OM60L96U_(U) Cooling system
Ignition system Capacity (Reference) 17.6 qt. (16.7 L, 14.7 Imp.qt.)
Coolant type Use either of the following.
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-sili-
cate, non-amine, non-nitrite, and non-borate cool-
ant with long-life hybrid organic acid technology
Do not use plain water alone.
Spark plug
Make
Gap DENSO SK20HR11
0.043 in. (1.1 mm)
NOTICE■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine.