Owners Manual
Page 404
The coolant level in the next column. Visually check the radiator, hoses, engine coolant filler cap, radiator cap and drain cock and water pump. Bring the level up to the "FULL" line. If the level is on the reservoir. Always use ethylene-glycol type coolant for leaks in... the system. If you can find no leak, have your Lexus dealer test the cap pressure and check for a proper corrosion protection of aluminum components. See information in the reservoir will vary with engine temperature....
The coolant level in the next column. Visually check the radiator, hoses, engine coolant filler cap, radiator cap and drain cock and water pump. Bring the level up to the "FULL" line. If the level is on the reservoir. Always use ethylene-glycol type coolant for leaks in... the system. If you can find no leak, have your Lexus dealer test the cap pressure and check for a proper corrosion protection of aluminum components. See information in the reservoir will vary with engine temperature....