Timing chains serve the same purpose as a belt, but usually lasts quite a bit longer. Some manufacturers suggest replacing it at certain intervals, but others state that it will last as long as the car itself. The timing chain looks similar to a bicycle chain, and as you might expect, it’s noisier than a belt. The other problem with timing chains is that if they do break, they’ll usually cause a lot more damage than a broken belt. Not that we’re suggesting a broken timing belt isn’t going to cause you problems – it definitely will. But with a broken belt, you might get away with just having the heads done. A broken chain will most likely result in damage that will result in a complete engine transplant being less expensive than the repairs you’ll need.