Lexus 2013 IS250, Owner'S Manual

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7-3. Do-it-yourself maintenance
7
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IS250_EE(OM53B11E)
The coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the engine is cold.
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line. (

P. 530)

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.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deion-
ized water. (Minimum temperature: -35

C [-31

F])
For more details about coolant, contact any authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.

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 any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional, test the cap and check for leaks
in the cooling system.
Engine coolant
1
2
3
CAUTION

When the engine is hot
Do not remove the engine coolant reservoir cap or radiator cap. (

P. 530)
The cooling system may be under pressure and may spray hot coolant if the cap
is removed, causing serious injuries, such as burns.