2017 Lexus GS F engine coolant

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6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_200t_GS F_OM_OM30F83E_(EE)
GS200t
Fuse boxes ( P. 493)
Battery ( P. 466)
Intercooler coolant reservoir ( P. 465)
Engine oil level dipstick( P. 459)
Engine oil filler cap ( P. 461) Engine coolant reservoir
( P. 464)
Washer fluid tank ( P. 470)
Condenser ( P. 466)
Electric cooling fans
Radiator ( P. 466)1
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4566-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30F83E_(EE)
GS 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. 493)
Battery ( P. 466)
Engine oil level dipstick( P. 459)
Engine coolant reservoir ( P. 464) Engine oil filler cap (
P. 461)
Washer fluid tank ( P. 470)
Electric cooling fans
Condenser ( P. 466)
Radiator ( P. 466)1
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4646-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30F83E_(EE)
The coolant level is satisfactory if it is between the “FULL”/ “F” and “LOW”/ “L”
lines on the reservoir when the engine is cold.
■Engine coolant reservoir
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW” li ne, add coolant up to the “FULL” line.
(  P. 602)
Coolant
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GS350GS200t
GS F

465
6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_200t_GS F_OM_OM30F83E_(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. 602)
■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 an y authorized Lexus retailer or Lexus autho-
rized repairer, or any reliable repairer.
■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 retailer or Lexus authorized repairer,
or any reliable repairer, test the cap an d check for leaks in the cooling system.
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WARNING
■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. 606)
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.

5167-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(EE)
If you think something is wrong
●Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points higher than nor-
mal.
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
● Engine missing, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spongy feeling, pedal almost touches the floor
If you notice any of the following sy mptoms, your vehicle probably needs
adjustment or repair. Contact any authorized Lexus retailer or Lexus autho-
rized repairer, or any reliable repairer as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

6027-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(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
retailer or Lexus authorized repairer, or
any reliable repairer.
The following may indicate that your vehicle is overheating.
Correction procedures
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603
7-2. Steps to take in an emergency
7
When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
The coolant level is satisfactory if it is between the “FULL”/ “F” and “LOW”/ “L”
lines on the reservoir.
Engine coolant reservoir
“FULL”/ “F”
“LOW”/ “L”
Coolant inlet cap
Intercooler coolant reservoir
GS200t
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GS350GS F

605
7-2. Steps to take in an emergency
7
When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
Start the engine and turn the air conditio ning system on to check that the radi-
ator cooling fans operate and to check for coolant leaks from the radiator or
hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are operating by checking the fan sound and air flow.
If it is difficult to check these, turn the air conditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately and contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
If the fans are operating:
Have the vehicle inspected at the nearest any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
■When adding engine coolant (GS350/GS200t)
Add coolant in accordance with the following procedure.
Remove caps A and B.
Add engine coolant through the inlet of cap A up to the “[AR/GR] B” line, and then
install cap A.
Add engine coolant through the inlet of cap B until it is full, and then install cap B.
GS200t only: When installing cap B, apply c oolant to the O-ring on the end of cap B.
Cap A
Cap B
“[AR/GR] B” line (Target fill line)
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GS350 GS200t
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