2015 LEXUS RC F engine

473
RC350/RCF_U (OM24636U)
7
Maintenance and care
7-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections.
ItemsPa r t s a n d t o o l s
Battery condition
( P. 4 8 7 )•Warm water• Baking soda•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
( P. 4 8 6 )• SAE J1703 or FMVSS No.116 DOT 3 brake fluid
•Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant level
( P. 4 8 4 )
• “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
For the U.S.A.:
“Toyota Super Long Life Coolant” is pre-mixed with 50%
coolant and 50% deionized water.
For Canada:
“Toyota Super Long Life Coolant” is pre-mixed with 55%
coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
( P. 4 8 1 )
• “Toyota Genuine Motor Oil” or equivalent
•Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses
( P. 5 0 9 )• Fuse with same amperage rating as original
Light bulbs
( P. 5 1 2 )
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead screwdriver
•Wrench
Radiator and con-
denser ( P. 4 8 5 )
Tire inflation pres-
sure (P. 5 0 0 )•Tire pressure gauge• Compressed air source
Wa s h e r f l u i d
( P. 4 9 0 )• Water or washer fluid containi ng antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

4747-3. Do-it-yourself maintenance
RC350/RCF_U (OM24636U)
WA R N I N G
The engine compartment contains many mechanisms and fluids that may move suddenly,
become hot, or become electrically energized. To avoid death or serious injury, observe
the following precautions.
■When working on the engine compartment
●Keep hands, clothing and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driving
as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel and
battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and corro-
sive sulfuric acid.
■When working near the electric cooling fans or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION ON mode, the electric cooling fans may auto-
matically start to run if the air conditioning is on and/or the coolant temperature is high.
(  P. 4 8 5 )
■Safety glasses
Wear safety glasses to prevent flying or fallin g material, fluid spray, etc. from getting in
your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to dirt
in the air.

4797-3. Do-it-yourself maintenance
7
Maintenance and care
RC350/RCF_U (OM24636U)
RC350
Engine compartment
Fuse boxes (P. 5 0 9 )
Battery ( P. 4 8 7 )
Engine oil level dipstick (P. 4 8 1 )
Engine coolant reservoir (P. 4 8 4 )
Engine oil filler cap ( P. 4 8 2 )Brake fluid reservoir (
P. 4 8 6 )
Wa s h e r f l u i d t a n k ( P. 4 9 0 )
Electric cooling fans
Condenser ( P. 4 8 5 )
Radiator ( P. 4 8 5 )1
2
3
4
5
6
7
8
9
10

4807-3. Do-it-yourself maintenance
RC350/RCF_U (OM24636U)
RC F
Fuse boxes ( P. 5 0 9 )
Battery ( P. 4 8 7 )
Engine oil level dipstick (P. 4 8 1 )
Engine coolant reservoir (P. 4 8 4 )
Engine oil filler cap ( P. 4 8 2 )Brake fluid reservoir (
P. 4 8 6 )
Wa s h e r f l u i d t a n k ( P. 4 9 0 )
Electric cooling fans
Condenser ( P. 4 8 5 )
Radiator ( P. 4 8 5 )1
2
3
4
5
6
7
8
9
10

4817-3. Do-it-yourself maintenance
7
Maintenance and care
RC350/RCF_U (OM24636U)
With the engine at operating temperature and turned off, check the oil level on
the dipstick.
■Checking the engine oil
Park the vehicle on level ground. After warming up the engine and turning
it off, wait more than 5 minutes for the oil to drain back into the bottom of
the engine.
Holding a rag under the end, pull the dipstick out.
Wipe the dipstick clean.
Reinsert the dipstick fully.
Holding a rag under the end, pull
the dipstick out and check the oil
level.
Low
Normal
Excessive
The shape of the dipstick may dif-
fer depending on the type of vehi-
cle or engine.
Wipe the dipstick and reinsert it fully.
Engine oil
1
2
RC350RC F
3
4
5
1
2
3
6

4827-3. Do-it-yourself maintenance
RC350/RCF_U (OM24636U)
■Adding engine oil
If the oil level is below or near the lo w level mark, add engine oil of the same
type as that already in the engine.
Make sure to check the oil type and prepare the items needed before adding
oil.
Remove the oil filler cap by turning it counterclockwise.
Add engine oil slowly, checking the dipstick.
Install the oil filler cap by turning it clockwise.
■Engine oil consumption
A certain amount of engine oil will be consum ed while driving. In the following situations,
oil consumption may increase, and engine o il may need to be refilled in between oil
maintenance intervals.
●When the engine is new, for example directly after purchasing the vehicle or after
replacing the engine
●If low quality oil or oil of an inappropriate viscosity is used
●When driving at high engine speeds or with a heavy load, or when driving while accel-
erating or decelerating frequently
●When leaving the engi ne idling for a long time, or when driving frequently through
heavy traffic
RC350RC F
Engine oil selection P. 6 0 8 , 6 0 9
Oil quantity (Low  Full) 1.6 qt. (1.5 L, 1.3 Imp. qt.)
Items Clean funnel
1
2
3

4837-3. Do-it-yourself maintenance
7
Maintenance and care
RC350/RCF_U (OM24636U)
WA R N I N G
■Used engine oil
●Used engine oil contains potentially harmful contaminants which may cause skin dis-
orders such as inflammation and skin canc er, so care should be taken to avoid pro-
longed and repeated contact. To remove used engine oil from your skin, wash
thoroughly with soap and water.
●Dispose of used oil and filters only in a safe and acceptable manner. Do not dispose of
used oil and filters in household tras h, in sewers or onto the ground.
Call your Lexus dealer, service station or auto parts store for information concerning
recycling or disposal.
●Do not leave used engine oil within the reach of children.
NOTICE
■To prevent serious engine damage
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
●Avoid overfilling, or the engine could be damaged.
●Check the oil level on the dipstick every time you refill the vehicle.
●Be sure the engine oil filler cap is properly tightened.

4847-3. Do-it-yourself maintenance
RC350/RCF_U (OM24636U)
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on
the reservoir when the engine is cold.
If the level is on or below the “LOW” line, add coolant up to the “FULL” line.
(  P. 5 9 7 )
■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 coolant reservoir cap, 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.
Engine coolant
RC350RC F
Reservoir cap
“FULL” line “LOW” line
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2
3