Lexus SC 430 2006 Owner's Manual page 216

CAUTION
When the engine is hot
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Do not remove the radiator cap. The cooling system may be under pressure and
may spray hot coolant if the cap is removed, causing burns or other injuries.
Do not touch the radiator or condenser, as they may be not and may cause burns.
NOTICE
When adding engine coolant
■
Do not use plain water alone.
If you spill coolant:
■
Be sure to wash it off with water to prevent damage to parts or paint.
4-3. Do-it-yourself maintenance
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