This TSB supersedes TSB 22-2377 to update the vehicle model years affected and Parts List. Some 2020-2023 Explorer vehicles equipped with a 3.0L EcoBoost engine or 2020-2023 Aviator vehicles equipped with a 3.0L EcoBoost or 3.0L PHEV engine may exhibit a ticking/tapping or rattle type noise from the top front cover area of the engine on initial start-up after a cold soak of 6 hours or more that may last for 2-5 seconds. This may be due to a worn VCT unit. To correct the condition, follow the Service Procedure to replace the VCT units
