Some 2018-2019 Lincoln Navigator vehicles built on or before April 8, 2019, may exhibit a ticking/tapping or rattle noise from the front cover area of the engine on initial startup after a cold soak of 6 hours or more that may last for 2-5 seconds.
Some 2018-2019 Lincoln Navigator vehicles built on or before April 8, 2019, may exhibit a ticking/tapping or rattle noise from the front cover area of the engine on initial startup after a cold soak of 6 hours or more that may last for 2-5 seconds.
This may be due to a worn variable cam timing (VCT) unit. To correct the condition, replace the VCT unit and update the PCM calibration with revised VCT parameters. Replace all four VCT units.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
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