2014 LEXUS RX270 radiator cap

468
4-3. Do-it-yourself maintenance
RX350/270_EE
Engine compartment
RX270
Engine oil filler cap
(→P. 4 74 )
Engine oil level dipstick
(→P. 4 7 2 )
Battery (→P. 4 7 9 )
Fuse box (→P. 504)Engine coolant reservoir
(→P. 477)
Condenser (→P. 4 7 8 )
Radiator (→P. 4 7 8 )
Electric cooling fans
Washer fluid tank (→P. 4 8 2 )
RX350_270_EE_48D77E.book 468 ページ ２０１４年１月２４日　金曜日　午前１０時４分

469
4-3. Do-it-yourself maintenance
4
Maintenance and care
RX350/270_EE
RX350
Engine oil filler cap
(→P. 4 74 )
Engine oil level dipstick
(→P. 4 7 2 )
Battery (→P. 4 7 9 )
Fuse box (→P. 504)Engine coolant reservoir
(→P. 477)
Condenser (→P. 4 7 8 )
Radiator (→P. 4 7 8 )
Electric cooling fans
Washer fluid tank (→P. 4 8 2 )
RX350_270_EE_48D77E.book 469 ページ ２０１４年１月２４日　金曜日　午前１０時４分

478
4-3. Do-it-yourself maintenance
RX350/270_EE
Radiator and condenser
Check the radiator and condenser and clear away any foreign objects.
If any of the above parts are extremely dirty or you are not sure of their
condition, have your vehicle checked by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, radiator cap, 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 systems.
CAUTION
■When the engine is hot
Do not remove the radiator cap.
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 engine 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 damage to parts or paint.
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.
RX350_270_EE_48D77E.book 478 ページ ２０１４年１月２４日　金曜日　午前１０時４分

598
5-2. Steps to take in an emergency
RX350/270_EE
If your vehicle overheats
Correction procedures
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,
immediately contact any autho-
rized Lexus dealer or repairer, or
another duly qualified and
equipped professional.
The coolant level is satisfactory if it
is between the “FULL” and “LOW”
lines on the reservoir.
Reservoir
“FULL” line
“LOW” line
“Radiator cap
The following may indicate that your vehicle is overheating.
●“ENGINE OVERHEAT” is shown on the multi-information display.
●Steam comes out from under the hood.
STEP1
STEP2
STEP3
STEP4
RX350_270_EE_48D77E.book 598 ページ ２０１４年１月２４日　金曜日　午前１０時４分

600
5-2. Steps to take in an emergency
RX350/270_EE
CAUTION
■To prevent an accident or injury when inspecting under the hood of your vehicle
●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, causing serious
injuries such as burns.
●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 serious injury.
●Do not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam released
under pressure.
NOTICE
■When adding engine coolant
Wait until the engine has cooled down before adding engine coolant.
When adding coolant, do so slowly. 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 any coolant additives.
RX350_270_EE_48D77E.book 600 ページ ２０１４年１月２４日　金曜日　午前１０時４分