I was hearing a clapping sound from the engine when driving. I checked to see if it could be an exhaust like form the headers it wasn't. I then got a hose and put to my ear and it sounded like it was from the number 5 cylinder/ spark plug area. I thought it might be a bent push rod so I took off the valve cover and checked and it wasn't so now I'm thinking stuck lifter. It didn't seem to have anyplay when i tightened the rods back down. What I was wondering is if there's a way to know if its the lifter making the noise or bearings. The noise when I used the hose to my ear sounded more pronounced from the spark plug are which makes me think its probably not a bearing. Any input would be much appretiated. I forgot to mention all rockers are new and rods are new and torqued to spec.