Funky Noise

My cav has been making a strange noise for quite some time now, and i have note been able to diagnos where its comming from. It is a clicking or tapping noise. It occurs when the vehicle is put in drive, adn seems to increase with rpm. The noise appears to be comming from (looking from front back) the right side of the engine. I pulled the rockerarm coer thinking it could be somthing in there but theyall looked fine and ran fine. Any suggestion what it may be?

Its a 93 cavalier 4 cyl. 2.2

check motor mounts, struts, rotors, could be anything.