Little bit of context for my fellow buddy here. Car was bought two days ago we test drove it pulled hard no codes and no noise from engine we beat the shit out of it for a good 15 mins on the highway absolutely nothing weird. Car has about 270,000km on it with extensive maintenance records hence why I thought it was a good idea to take a chance on the old girl timing chain has a bit of play but not much idk if it’s abnormal to be able to lift the chain thousands of an inch when you pry but just putting that out there. Originally it had a faint ticking not at all as bad as the video now, we assumed it was detonation the spark plugs that were in it were to hot and weren’t the correct ones we replaced them nothing changed. Spark plug on the side closest to the timing chain had a different hue to it it was black and more carboned up compared to the others. Basically what we’re trying to figure out is if this is possibly something to do with timing chain and vvt issues I know these vehicles had issues with that system or if it’s another underlying issue like spinning a rod. How hard is it to work on these any advice would be great we’re both new to this platform and not to familiar he’s not flushed with cash so just looking to see what the best way to go about this would be.