There is a rubber grommet through which an elbow passes on top of the valve cover. The elbow then connects via hose to the air cleaner. I want to replace the stock air cleaner and place a breather in the valve cover. The problem being the old grommet is very hard and not removable without a chisel. Is there any way to soften the grommet for easier removal? I don't want to remove the valve cover if I don't need to. Have heard to apply paint thinner to the grommet as this will soften it. Any ideas?
mike