NHTSA Complaint #11588966 — 2018 FORD F-150

see NTSHA report of technical service bulletin. This describes exactly the issue. As a result, the timing chain has been diagnosed as stretched due to the cam phaser issue. From what I understand, the safety concern is that the timing chain, if left undiagnosed/unrepaired can cause engine failure, loss of control etc. Ford has attempted to fix the VCT (Variable camshaft timing. [XXX] . the below is Ford's TSB issued 04May2023 TECHNICAL SERVICE BULLETIN 3.5L EcoBoost - Cold Start Ticking/Tapping/Rattle With Possible No Restart During Auto-Start-Stop Operation 23-2143 04 May 2023 This bulletin supersedes 22-2200. Model: Ford 2018-2020 Expedition Built on or before 30-Nov-2019 2017-2020 F-150 Engine: 3.5L EcoBoost Built on or before 30-Nov-2019 Lincoln 2018-2020 Navigator Built on or before 30-Nov-2019 Summary This article supersedes TSB 22-2200 to update the production fix date, Action statement and customer symptom. NOTE: Certain parts may now be reused for this repair. Refer to the Service Procedure for details. Issue: Some 2017-2020 F-150 and 2018-2020 Expedition/Navigator vehicles built on or before 30-Nov-2019 and equipped with a 3.5L 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. Some vehicles may also exhibit an intermittent condition with no auto restart during auto-start-stop operation with or without diagnostic trouble code (DTC) P164C present in the powertrain control module (PCM). This may be due to a worn variable camshaft timing (VCT) unit. To correct the condition, follow the Service Procedure to replace the VCT units. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)