I see the ones that come apart every once in a while at work. They make a light chirping noise with the engine running and the engine does run rougher when the rubber is split. It's kinda funny to watch the timing mark jump all over when you have a timing light on it. I've never heard of anyone doing their own timing chain and not notice that their front pulley was in two pieces, but could see were this would case a major problem. Tell me this dumb arse bent all his valves. LOL
