2015 Lexus GS F radiator

443
6
6-3. Do-it-yourself maintenance
Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections.
ItemsParts and tools
Battery condition
(
→ P. 4 6 0 ) •Warm water •Baking soda •Grease
• Conventional wrench (for terminal clamp bolts)
• Distilled water
Engine/intercooler
coolant level
(
→ P. 4 5 8 ) •“
To y o t a 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 pre-mixed with 50%
coolant and 50% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
( → P. 4 5 3 )• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( →P. 4 8 7 )• Fuse with same amperage rating as original
Light bulbs
(→ P. 4 9 2 )• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead screwdriver
•Wrench
Radiator and
condenser
(→ P. 4 6 0 )
Tire inflation
pressure ( →P. 4 7 9 )• Tire pressure gauge• Compressed air source
Wa s h e r f l u i d
(→ P. 464)• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

4446-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
WA R N I N G
The engine compartment contains many mechanisms and fluids that may move suddenly,
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 tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driving
as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel or
the battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and corro-
sive sulfuric acid.
●Take care because brake fluid can harm your hands or eyes and damage painted sur-
faces. If fluid gets on your hands or in your eyes, flush the affected area with clean
water immediately. If you still experience discomfort, consult a doctor.
■When working near the electric cooling fans or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION ON mode, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant temperature is high.
( → P. 4 6 0 )
■Safety glasses
Wear safety glasses to prevent flying or fallin g material, fluid spray, etc. from getting in
your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to dirt
in the air.
■If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear or when
the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, it may indicate a serious problem.

4486-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
Engine compartment
XGS350
Fuse boxes (→P. 4 8 7 )
Battery ( →P. 4 6 0 )
Engine oil level dipstick( →P. 4 5 3 )
Engine coolant reservoir (→ P. 4 5 8 ) Engine oil filler cap (
→P. 4 5 5 )
Wa s h e r f l u i d t a n k ( →P. 464)
Electric cooling fans
Condenser ( →P. 4 6 0 )
Radiator ( →P. 4 6 0 )1
2
3
4
5
6
7
8
9

449 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
XGS200t
Fuse boxes (→P. 4 8 7 )
Battery ( →P. 4 6 0 )
Intercooler coolant reservoir (→ P. 4 5 9 )
Engine oil level dipstick( →P. 4 5 3 )
Engine oil filler cap ( →P. 4 5 5 ) Engine coolant reservoir
(→ P. 4 5 8 )
Wa s h e r f l u i d t a n k ( →P. 464)
Condenser ( →P. 4 6 0 )
Electric cooling fans
Radiator ( →P. 4 6 0 )1
2
3
4
5
6
7
8
9
10

4506-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
XGS F
For right-hand drive vehicles:
The battery and the fuse box in front of the battery are located on the opposite
side of the engine compartment.
Fuse boxes ( →P. 4 8 7 )
Battery ( →P. 4 6 0 )
Engine oil level dipstick( →P. 4 5 3 )
Engine coolant reservoir (→ P. 4 5 8 ) Engine oil filler cap (
→P. 4 5 5 )
Wa s h e r f l u i d t a n k ( →P. 464)
Electric cooling fans
Condenser ( →P. 4 6 0 )
Radiator ( →P. 4 6 0 )1
2
3
4
5
6
7
8
9

459 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
■Intercooler coolant reservoir (GS200t only)Reservoir cap
“F” line
“L” line
If the level is on or below the “L” line,
add coolant up to the “F” line.
( → P. 5 9 6 )
■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 mixt ure of 50% coolant and 50% deionized water.
(Minimum temperature: -35 °C [-31 °F])
For more details about coolant, contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir caps, drain cock and water
pump.
If you cannot find a leak, have any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional, test the cap and check for leaks in the cooling sys-
tem.
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2
3
WA R N I N G
■When the engine is hot
Do not remove the engine coolant reservoi r cap, the intercooler coolant reservoir cap
or the coolant inlet cap. ( →P. 6 0 0 )
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.

4606-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
Check the radiator and condenser and clear away any foreign objects.
If either of the above parts is extremely dirty or you are not sure of their condi-
tion, have your vehicle inspected by any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Check the battery as follows.
■Caution symbols
The meanings of each caution symbol on the top of the battery are as follows:
Radiator and condenser
WA R N I N G
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause serious injuries,
such as burns.
Battery
No smoking, no naked
flames, no sparksBattery acid
Shield eyesNote operating instructions
Keep away from childrenExplosive gas

5967-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30E87E_(EE)
If your vehicle overheats
●The needle of the engine coolant temperature gauge (→P. 108, 113) enters
the red zone or a loss of engine power is experienced. (For example, the vehi-
cle speed does not increase.)
●“Engine Coolant Temp High Stop in a Safe Place See Owner’s Manual” is shown
on the multi-information display.
●Steam is coming from under the hood.
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, imme-
diately contact any authorized Lexus
dealer or repairer, or another duly quali-
fied and equipped professional.
The following may indicate that your vehicle is overheating.
Correction procedures
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