my sunfire has a loud tick/knock has a 2.4l engine with 200k on it. it gets louder as the rpms go up as soon as i start it its knocking right away. also noticed a ruff idle at times aswell and a couple stalls on me. no engine lights or anything on it what u guys think lifter? timing chain? rod bearing? its way to cold here in ontario and lots snow so i cant really work on it for for few weeks just wondering what u guys think. it sounds to me its coming from the top of the engine. once its wormer out i can drop the pan and check the rod bearings but for now i cant do to much. thanks in advance kevin. here a vid of it running https://www.youtube.com/watch?v=oqO7kocMl80 note its louder in person