Lexus SC 430 2001 Owner's Manual page 227

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 hot and may cause burns.
NOTICE
When adding engine coolant
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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:
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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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