engine coolant Lexus GS F 2016 User Guide

396
GS350_200t_GS F_OM_OM30E86U_(U)6-3. Do-it-yourself maintenance
Engine compartment
XGS350
Fuse boxes (
→P. 4 3 1 )
Battery (→ P. 4 1 0 )
Engine oil level dipstick (→ P. 4 0 1 )
Engine coolant reservoir (→ P. 4 0 6 )
Engine oil filler cap ( →P. 4 0 3 ) Brake fluid reservoir
(→ P. 4 0 9 )
Wa s h e r f l u i d t a n k ( →P. 4 1 2 )
Electric cooling fans
Condenser ( →P. 4 0 8 )
Radiator ( →P. 4 0 8 )1
2
3
4
5
6
7
8
9
10

GS350_200t_GS F_OM_OM30E86U_(U)
3976-3. Do-it-yourself maintenance
6
Maintenance and care
XGS200t
Fuse boxes (→P. 4 3 1 )
Battery (→ P. 4 1 0 )
Intercooler coolant reservoir (→ P. 4 0 6 )
Engine oil level dipstick (→ P. 4 0 1 )
Engine oil filler cap ( →P. 4 0 3 ) Engine coolant reservoir
(→ P. 4 0 6 )
Brake fluid reservoir (→ P. 4 0 9 )
Wa s h e r f l u i d t a n k ( →P. 4 1 2 )
Condenser ( →P. 4 0 8 )
Electric cooling fans
Radiator ( →P. 4 0 8 )1
2
3
4
5
6
7
8
9
10
11

398
GS350_200t_GS F_OM_OM30E86U_(U)6-3. Do-it-yourself maintenance
XGS F
Fuse boxes (
→P. 4 3 1 )
Battery (→ P. 4 1 0 )
Engine oil level dipstick (→ P. 4 0 1 )
Engine coolant reservoir (→ P. 4 0 6 )
Engine oil filler cap ( →P. 4 0 3 ) Brake fluid reservoir
(→ P. 4 0 9 )
Wa s h e r f l u i d t a n k ( →P. 4 1 2 )
Electric cooling fans
Condenser ( →P. 4 0 8 )
Radiator ( →P. 4 0 8 )1
2
3
4
5
6
7
8
9
10

406
GS350_200t_GS F_OM_OM30E86U_(U)6-3. Do-it-yourself maintenance
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” line, add coolant up to the “FULL” line.
(→ P. 5 2 8 )
■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 2 8 )
Coolant
1
2
3
XGS350XGS200t
XGS F
1
2
3

GS350_200t_GS F_OM_OM30E86U_(U)
4076-3. Do-it-yourself maintenance
6
Maintenance and care
■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 mixture of 50% coolant and 50% deionized water.
(Minimum temperature: -31 °F [-35 °C])
Canada:
“Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deionized water.
(Minimum temperature: -44° F [-42°C])
For more details about coolant, contact your Lexus dealer.
■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 your Lexus dealer test the cap and check for leaks in the
cooling system.
WA R N I N G
■When the engine is hot
Do not remove the engine coolant reservoir cap, the intercooler coolant reservoir cap
or the coolant inlet cap. ( →P. 5 3 2 )
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.

450
GS350_200t_GS F_OM_OM30E86U_(U)7-2. Steps to take in an emergency
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 symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

4677-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30E86U_(U)
7
When trouble arises
Indicates that the engine coolant temperature is too high A buzzer also sounds.
→ P. 5 2 8
(GS350/GS200t only)
Indicates a malfunction in the vehicle’s charging system.
→Immediately stop the vehicle in a safe place and
contact your Lexus dealer. Continuing to drive the
vehicle may be dangerous.
(If equipped)
Indicates that the radar sensor is dirty or covered with
ice
A buzzer also sounds.
→ Clean the sensor.
Warning messageDetails/Actions

528
GS350_200t_GS F_OM_OM30E86U_(U)7-2. Steps to take in an emergency
If your vehicle overheats
●The needle of the engine coolant temperature gauge (
→P. 86, 92) enters the
red zone or a loss of engine power is experienced. (For example, the vehicle
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 cooling
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.
Correction procedures
1
2
3
1
2

5297-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30E86U_(U)
7
When trouble arises
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 reservoir4
1
2
3
4
5
XGS350XGS F
XGS200t

5307-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30E86U_(U)
Add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
Start the engine and turn the air conditioning 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 your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
5
XGS350XGS F
XGS200t
6
7