Lexus RX300 2003, Owner'S Manual

Page: 309 / 354

CHECKING THE ENGINE COOLANT
LEVEL
62R043
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 “F” 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 “F” 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 radiator
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.