Toyota Lexus IS300, Manual

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ENGINE
319
CHECKING THE ENGINE COOLANT
LEVEL
SV62006
1 Reservoir cap 2 Upper line 3 Lower line
Look at the see–through coolant reservoir when the
engine is cold. The coolant level is satisfactory if it is
between the”FULL” and ”L” lines on the reservoir. If the
level is low, add ethylene–glycol type coolant for a proper
corrosion protection of aluminum components.
The coolant level in the reservoir will vary with engine
temperature. However, if the level is on or below the ”L” line,
add coolant. Bring the level up to the ”FULL” line.
Always use ethylene–glycol type coolant for a proper corrosion
protection of aluminum components. See information in the
next column.
If the coolant level drops within a short time after replenishing,
there may be a leak in the system. Visually check the radiator,
hoses, engine coolant filler cap, radiator cap and drain cock
and water pump.
If you can find no leak, have your Lexus dealer test the cap
pressure and check for leaks in the cooling system.
CAUTION
To prevent burning yourself, do not remove the radiator
cap when the engine is hot.
Coolant type selection
Use of improper coolants may damage your engine cooling
system. Your coolant must contain ethylene–glycol type
coolant for a proper corrosion protection of your engine that
contains aluminum components. We have used ”Toyota
Genuine Long Life Coolant” in your Lexus vehicle. In order to
avoid technical problems, we strongly recommend using
”Toyota Genuine Long Life Coolant” or equivalent.
In addition to preventing freezing and subsequent damage to
the engine, this type of coolant will also prevent corrosion.
Further supplemental inhibitors or additives are neither
needed nor recommended.
Read the coolant container for information on freeze
protection. Follow the manufacturer’s directions for how much
to mix with plain water (preferably demineralized water or
distilled water). The total capacity of the cooling system is
given on page 310.
2003 IS300 from Aug. ’02 Prod. (OM53439U)