99 camry kind of loud motor
 

I bought a 99 camry with a 4 cyl motor and it runs and drives great but I did notice that the top end of the motor (possibly lifters?) makes a kind of loud clicking or ticking noise. It's not injectors. It's not a knock and it's not extremely loud but it is pretty noticeable. I was just wondering if that's normal on these camrys. Thanks for any help I can get...