WHEN I TOOK MY SE TO THE DEALER I ASKED HIM TO SEE WHAT WAS CAUSING THE NOISY ENGINE SOUNDS. HE SAID IT WAS PISTON SLAP. EVEN IN THE NEW NEONS ON THE LOT THEY DO IT.

I DID START UP A 05 NEON WITH 10K MILES AND IT "SLAPPED"

MABYE IF I REBUILD THE ENGINE I COULD CALL IT PISTON CLAP SINCE THE PROBLEM WILL BE SOLVED