2013 Lexus GS350 radiator

GS350_U (OM30C34U)
6216-3. Do-it-yourself maintenance
6
Maintenance and care
CAUTION
■When the engine is hot
Do not remove the engine coolant reservoir cap or the radiator cap.(P. 74 8 )
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 cooling. 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.

622
GS350_U (OM30C34U)
6-3. Do-it-yourself maintenance
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
condition, have your vehicle inspected by your Lexus dealer.
Radiator and condenser
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.

747
GS350_U (OM30C34U)
7
When trouble arises
7-2. Steps to take in an emergency
If your vehicle overheats
Stop the vehicle in a safe place an d turn off the air conditioning system.
Check to see if steam is coming out from under the hood.
If you see steam:
Stop the engine. Carefully lift the hood after the steam subsides and
then restart the engine.
If you do not see steam:
Leave the engine running and carefully lift the hood.
Check to see if the cooling fan is operating.
If the fan is operating:
Wait until the temperature of the engine (shown on the instrument
panel) begins to fall and then stop the engine.
If the fan is not operating:
Stop the engine immediately and call your Lexus dealer.
After the engine has cooled
down sufficiently, check the
engine coolant level and inspect
the radiator core (radiator) for
any leaks.
If the engine compartment cover
needs to be removed: P. 6 1 6
Add engine coolant if necessary.
Water can be used in an emergency if
engine coolant is unavailable.
( P. 7 5 6 )
Have the vehicle inspected at the near est Lexus dealer as soon as possi-
ble.
1
2
3
4
5

7487-2. Steps to take in an emergency
GS350_U (OM30C34U)
■Overheating
If you observe the following, your vehicle may be overheating:
●The engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
●Steam comes out from under the hood.
CAUTION
■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 hood, do not open the hood until the
steam has subsided. The engine compartment may be very hot.
●Keep hands and clothing away from the fa ns, etc. while the engine is operating.
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 foreign matter (such as sand or dust etc.).
●Do not use commercially available coolant additives.
●Do not loosen the radiator cap while the
engine and radiator are hot.
High temperature steam or coolant could
spray out.

819Alphabetical index
GS350_U (OM30C34U)
Paddle shift switches ............................ 180
Parking assist sensors (intuitive parking assist) .................. 238
Parking brake.......................................... 186 If the parking brake cannot be released........................738
Operation ............................................... 186
Parking brake engaged warning buzzer .............................. 706
Parking brake engaged warning message .......................... 706
Parking lights ........................................... 190 Light switch ............................................ 190
Replacing light bulbs ..........................671
Welcome light illumination control ........................... 101
PCS (Pre-Collision System) ............ 278 Function ..................................................278
PCS OFF switch ............................... 280
Warning light ...................................... 688
Warning message .......................699, 708, 714
Personal lights........................................ 549
Power easy access system .................133
Power outlets ......................................... 564
Power steering (Electric Power
Steering system) ................................ 269 Warning light ...................................... 687
Warning message .............................702
Power trunk opener and closer ........ 121 Power windows....................................... 145
Door lock linked window operation ........................... 147
Jam protection function....................146
Operation................................................145
Window lock switch ..........................145
Pre-Collision System (PCS).............278 Function .................................................. 278
PCS OFF switch ................................280
Warning light ...................................... 688
Warning message....................... 699, 708, 714
Radar cruise control (dynamic radar cruise control).......................... 213
Radiator.....................................................622
Radio ......................................................... 390
RBDS (Radio Broadcast Data Systems) .................................... 393
Rear air conditioning system........... 360
Rear personal lights ............................ 549
Rear side marker lights ........................190 Light switch............................................ 190
Replacing light bulbs ......................... 671
Welcome light illumination control ........................... 101
Rear door sunshades...........................573
Rear seat heaters ................................. 568
Rear sunshade ........................................572 Operation.............................................. 572
Reverse operation feature ............ 573
P
R
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.