How long does it take to rebuild a engine?

It typically takes 1-3 months to rebuild an engine, depending on the parts required and the complexity of the job. If all the necessary parts are available, a rebuild can take as little as one week, but if parts need to be sourced or if the engine is particularly complex, the rebuild could take much longer. Additionally, the skill and experience of the mechanic performing the job will also affect the time it takes to rebuild an engine.