1. Wait until the engine has cooled down, then carefully remove the radiator cap.
2. Check the coolant level, which should be at the lower edge of the radiator neck.
3. Install a device for checking radiator plugs on the radiator neck and create a pressure of 150 kPa in the system. Maintaining the specified pressure for two minutes, verify that there are no fluid leaks from the radiator, through the hoses and connections.
4. If a leak is found, repair or replace the relevant part.