* Mechanic's skill and experience: A seasoned mechanic will be significantly faster than someone doing it for the first time.
* Access to tools and equipment: Having the right tools and a proper workspace dramatically reduces time. A lift is a huge advantage.
* Condition of the vehicle: Rust, seized bolts, or other unexpected issues can add hours to the job.
* Engine type: Even within the 2000 Taurus model year, there were different engine options, and some may be slightly more or less complex to remove and install.
A *rough estimate* from experienced mechanics might range from 8 to 16 hours, but it's entirely possible to take longer or (less likely) slightly shorter. It's best not to rely on these estimates for scheduling purposes. Get a quote from a reputable mechanic to get a more accurate timeframe.