2016 LEXUS RC300 radiator

4877-3. Do-it-yourself maintenance
7
Maintenance and care
RC350_RC300_RC200t_RC F_U (OM24671U)
RC F
Fuse boxes (P. 5 1 9 )
Battery ( P. 4 9 7 )
Engine oil level dipstick (P. 4 8 8 )
Engine coolant reservoir (P. 4 9 3 )
Engine oil filler cap ( P. 4 9 0 ) Brake fluid reservoir (
P. 4 9 6 )
Wa s h e r f l u i d t a n k ( P. 5 0 0 )
Electric cooling fans
Condenser ( P. 4 9 5 )
Radiator ( P. 4 9 5 )1
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4947-3. Do-it-yourself maintenance
RC350_RC300_RC200t_RC F_U (OM24671U)
■Intercooler coolant reservoir (RC200t only)
The coolant level is satisfactory if it is between the “F” and “L” lines on the res-
ervoir when the engine is cold. Reservoir cap
“F” line
“L” line
If the level is on or below the “L” line,
add coolant up to the “F” line.
( P. 6 0 8 )
■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 mixt ure of 50% coolant and 50% deionized water.
(Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Coolant” is a mixt ure of 55% coolant and 45% deionized water.
(Minimum temperature: -44 F [-42 C])
For more details about engine coolant, contact your Lexus dealer.
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine and intercooler 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.
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4957-3. Do-it-yourself maintenance
7
Maintenance and care
RC350_RC300_RC200t_RC F_U (OM24671U)
Check the radiator, condenser and intercooler radiator and clear away any for-
eign objects.
If any of the above parts are extremely dirty or you are not sure of their condition,
have your vehicle inspected by your Lexus dealer.
WA R N I N G
■When the engine is hot (RC350/RC300/RC200t)
Do not remove the engine coolant reservoir cap, intercooler coolant reservoir cap and
radiator cap. ( P. 6 1 2 )
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
■When the engine is hot (RC F)
Do not remove the engine coolant reservoir cap. ( P. 6 1 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.
Radiator, condenser and intercooler radiator (if equipped)
WA R N I N G
■When the engine is hot
Do not touch the radiator, condenser or intercooler as they may be hot and cause seri-
ous injuries, such as burns.

6098-2. Steps to take in an emergency
8
When trouble arises
RC350_RC300_RC200t_RC F_U (OM24671U)
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.
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RC350/RC300RC200t
RC F

6118-2. Steps to take in an emergency
8
When trouble arises
RC350_RC300_RC200t_RC F_U (OM24671U)
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 oper ating by checking the fan sound and air flow.
If it is difficult to check th ese, turn the air conditioning system on and off repeatedly.
(The fan 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.
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Engine (RC350/RC300)Engine (RC200t)
Engine (RC F)Intercooler (RC200t)
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6128-2. Steps to take in an emergency
RC350_RC300_RC200t_RC F_U (OM24671U)
WA R N I N G
■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 (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 seri-
ous injury.
●RC350/RC300: While the engine and radi-
ator are hot, do not loosen or remove the
coolant reservoir cap or radiator cap. (The
radiator cap is located under the engine
cover.)
High temperature steam or coolant could
spray out.
●RC200t: While the engine and radiators are
hot, do not loosen or remove the coolant res-
ervoir cap, radiator cap, or intercooler cool-
ant reservoir cap.
High temperature steam or coolant could
spray out.
●RC F: While the engine and radiator are hot,
do not loosen or remove the coolant reser-
voir cap.
High temperature steam or coolant could
spray out.

692Alphabetical index
RC350_RC300_RC200t_RC F_U (OM24671U)
Radar cruise control (dynamic radar cruise control) ........................ 239
Radiator .................................................... 495
Radio........................................................... 351
Rear seats ................................................. 158 Fold down the seatback .................. 158
Luggage security system ................ 144
Rear turn signal lights .......................... 210 Replacing light bulbs ........................526
Turn signal lever .................................. 210
Wattage ................................................. 635
Rear view mirror Inside rear view mirror ..................... 169
Outside rear view mirrors ................ 171 Rear window defogger .......................424
Refueling.................................................... 231
Capacity ................................................. 622
Fuel types............................................... 622
If the fuel filler door cannot be opened ......................... 233
Opening the fuel tank cap ............ 233
Remote Touch
*
Replacing Electronic key battery ....................... 517
Fuses ..........................................................519
Light bulbs............................................. 522
Tires .......................................................... 570
Reporting safety defects for U.S. owners ...................................664
Resetting the message indicating maintenance is required ................. 473
Rev indicator ..................................... 94, 101
Rev peak ............................................94, 102
R