Where is the radiator filler hole on 1991 ls 400?

On the 1991 Lexus LS 400, the radiator filler hole is located at the front of the engine bay, typically near the driver's side. It is found on the top of the radiator, covered by a cap that usually has a warning label indicating it's for coolant. To access it, you may need to remove the engine cover if it’s obstructing your view. Always ensure the engine is cool before opening the radiator cap to avoid burns.