Using this coolant reservoir cap is a breeze. First, make sure your engine is cool. Then, take off the original OEM cap. You can either press our new cap onto the old one or use glue for a more secure fit. When it comes to maintenance, just clean it regularly with a mild cleaner to keep it looking shiny. Remember, this cap is designed for 2020 - 2023 Ford F - Series with 6.7L Powerstroke engines, so don't try to use it on other models. If you have any questions or notice any issues, reach out to our customer service team.