Harsh tapping (97 4.0)
 

97 xj 4.0, Okay so I know that there are threads all over about this but everything I'm reading or being told isn't much help, people are saying it's a wrist pin but when I put a stethoscope to the valve cover it seems like the sound is coming from right behind the oil fil cap. I pulled the valve cover off and one of the rocker arms where a lot looser then the others, I went and retorqued them all and some are still Fairly loose, I'm just not sure if it is the one rocker arm that was loose causing this tapping but the tapping is still present. I asked muiltiole people in my jeep club and not much help. Just need some insight of people who have had this problem or can give me an idea of what it would be