The answer to this question depends on a few factors, such as the make and model of your vehicle, your level of mechanical experience, and whether or not you have all the necessary tools. Generally speaking, it should take about an hour to change a VVT solenoid. However, if you are unfamiliar with automotive repairs, it may take longer. Additionally, if you do not have all the necessary tools (e.g., socket wrench, torque wrench), it will likely take longer as well.