Hi, I have a 2004 Fiat Panda, with a 1.2 liter, 60HP petrol engine. The rocker cover (the older type with a square push/pull oil filler cap) has a crack on it so I would like to replace it. I went to the local car breaker and found a Punto with a similar 1.2 liter engine, however, when checking the details, I realized that after removing the oil filler cap, the plate inside the rocker cover has a slightly different shape that the one on my Panda. Do you know why is the plate different if the engine is more or less the same and if the Punto's rocker cover can be fitted onto the Panda engine. Also, what is the role of that plate? Many thanks!