Hello. I have a 1987 Carver 32. Behind the lower helm, is what I have identified as the pressure relief valve for steering. I see the 3 hoses coming out of the back of the valve. Where I see oil and a little bit of bubbling, is out of this cap on the side. The cap has a slot which would appear you can remove. What I need to know...is there a packing that can be replaced for this cap? If so, I need a part number for the packing. I have not attempted to tighten, as I am unsure if this for some type of adjustment cap as this is a valve. I am maintenance literate, but I want to know what I am up against before I rip and tear. I will attempt to load a photo of someone elses valve that I found. I didnt take a photo of mine.