Chevrolet Cavalier Camshaft Lifter Collapsed

I Have What Appears To Be A Collapsed Lifter - There's Nearly 1/8" Of Play In The Rocker Arm. The Car Runs Ok, But It's Pretty Noisy....

I Have A 1996 Chevy Cavalier, It Has 36000 Miles, With A 2.2 Engine. The Car Overheated And Warped The Head, I Replaced The Head With A Used...