I am working on a 2004 Honda Accord with a 2.4 engine. It has an oil leak behind the head. Behind the head on the passenger side, when I reach my hand back just below the level of the valve cover, I feel a bulbous component. What is that component directly behind the head? Its not on the siide but it is behind the head between the head and firewall and it is cylindrical and round like a small bell head. It is leaking oil and dripping onto the passenger side cv shaft. Thanks