Ticking and more!

I was told that I needed a valve adjustment from a couple of the members at the last so Cal meet due to the ticking in the motor. I was listening to it today as I was parked, and I faintly heard almost a knocking type sound every 5-10 seconds. Can somebody please explain what this might be, and how to fix it? Thanks a bunch!

its either u need a valve adjustment or you lifters are loose or bad…take it to a dealer and have them check it out…if they do a valve adjustment…make sure they check the lifters!!!..have that problem when i put in mah cams…