Ford F-150 2018–2019 — technical service bulletin
Bulletin SSM 47876 · NHTSA communication 10156596 · issued Mar 18, 2019
Technical service bulletin
communication type
Engine
component
2018–2019
model years
2
vehicle entries
Official summary
Some 2018-2019 F-150 vehicles equipped with a 5.0L engine may exhibit a chirping type noise from the upper right side of the engine at a warm or hot idle. This noise may sound similar to a front engine accessory drive (FEAD) chirp noise. If the noise persists with the FEAD belt removed and is isolated to the front cover area, this noise may be due to the primary timing chain tensioner. This noise will not result in any engine durability concerns. Do not attempt any repairs at this time. Engineering is investigating, monitor OASIS for updates.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.