If you must remove the engine fan on your 103 engine you will need to have this tool. It is designed to go in behind and insert in a hole on the back side of pulley. This will prevent the pulley from turning while removing the fan bolt. There is no other practical way to do it. This tool does not come with instructions. You will need to refer to the factory manual or CD for more information on its use.
Insertion Point for 103 Engine Fan Pulley Holder