Your suzuki samurai is making a loud tapping noise you checked the valves somebody told you about a pin holding something in the head coming outI dont really know what he was talking about?
more than likely it's not in the head, it's probably going to be in the bottom end. It could be a rist pin or a rod cap. Another case might be that it is the well known 'piston slap' that most all suzukis make when they are cold. If your engine never warms up it may go on forever.