This happened to me too. I asked my dealer for a new cap and rubber gasket. Mine I think had fallen into the tank and the retrieval resulted in a small tear from the middle hole out wards. Oil was leaking down the sides. Amazingly Morgan sent the dealer a cap with a dip stick attached, not once but twice. My dealer actually took the gasket off his demonstrator & sent it to me. Surprised others have had the same issue. I don't recognize the cap / no gasket in the picture above my post.
