This TSB supersedes TSB 23-2049 to update the parts list. Some 2019-2023 Edge/Nautilus vehicles equipped with a 2.7L EcoBoost 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 stuck internal components of the variable cam timing (VCT) unit. To correct the condition, follow the Service Procedure to replace the VCT units.
