SSM 51665
Service Bulletin Details
Public Details for: SSM 51665
Some 2021-2023 ford and lincoln vehicles equipped with a 2.7l or 3.0l engine may exhibit an upper engine thump/knock noise coming from the left cylinder head. This condition is most noticeable at idle and may lessen at higher engine speed o
Models from 2023
| 2023 FORD BRONCO |
| 2023 FORD EDGE |
| 2023 FORD EXPLORER |
| 2023 FORD F-150 |
| 2023 LINCOLN AVIATOR |
| 2023 LINCOLN NAUTILUS |
Models from 2022
| 2022 FORD BRONCO |
| 2022 FORD EDGE |
| 2022 FORD EXPLORER |
| 2022 FORD F-150 |
| 2022 LINCOLN AVIATOR |
| 2022 LINCOLN NAUTILUS |
Models from 2021
| 2021 FORD BRONCO |
| 2021 FORD EDGE |
| 2021 FORD EXPLORER |
| 2021 FORD F-150 |
| 2021 LINCOLN AVIATOR |
| 2021 LINCOLN MKX |
| 2021 LINCOLN NAUTILUS |
Models from 2020
| 2020 FORD EDGE |
| 2020 FORD EXPLORER |
| 2020 FORD F-150 |
| 2020 LINCOLN AVIATOR |
| 2020 LINCOLN MKX |
| 2020 LINCOLN NAUTILUS |
SSM 51665 2021-2023 Bronco (U725N) (G1) 2020-2023 Edge (CD539N) (DQ) 2020-2023 Explorer (U625N) (TW) 2020 F-150 (P552) (FC) 2021-2023 F-150 (P702) (FD) 2020-2023 Aviator (U611N) (TV) 2020-2023 MKX/Nautilus (U540N) (D9) 2.7L/3.0L Engines - Upper Engine Thump/Knock Noise Some 2021-2023 Ford and Lincoln vehicles equipped with a 2.7L or 3.0L engine may exhibit an upper engine thump/knock noise coming from the left cylinder head. This condition is most noticeable at idle and may lessen at higher engine speed or while driving. This condition does not affect vehicle durability and will not get worse over time. Use a stethoscope or chassis ears and listen just behind the left cylinder head intake VCT solenoid on the cam cover to determine if the thump/knock noise is coming from the cylinder head/camshaft. The left cylinder head and the camshaft roller followers are available as service parts.