Dealing with an engine is one of the most complex tasks anyone can perform in a vehicle. Sometimes, removing any component is just a step to do something, such as removing the timing chain. Although ...

It has a timing chain, which doesn't need to be replaced as a toothed belt does, but it's worth checking the timing chain guides as they wear and if the wear is allowed to become excessive they can ...

Good news, Amy; your Corolla has an engine with a timing chain rather than a timing belt. While a timing belt needs periodic replacement, the timing chain should be good for the life of the engine.