Customer Satisfaction Program 21B26 – Secondary Timing Chain Tensioner – 2020 Ford Mustang GT500/GT350

2020 Ford Mustang Shelby GT500

NHTSA ID Number: 10198613 Manufacturer Communication Number: 21B26-S1 Summary In some of the affected vehicles, the engine’s secondary timing chain tensioner may not have been properly activated during assembly, which could result in a timing loss. Timing loss could lead to internal engine damage, a rough running engine , and engine misfires.     PROGRAM TERMS  This … Read more

Engine Noise Immediately After Installation Of A Secondary Timing Chain Tensioner – 2011-2014 Ford

2014 Ford Mustang

NHTSA ID Number: 10155576 Manufacturer Communication Number: SSM 47830 Summary Some 5.0L 4V engines may exhibit a tick/tap/rattle or knock immediately after secondary timing chain tensioner installation. In some cases the secondary timing chain tensioners are not fully released during installation.To confirm, remove both valve covers and inspect the secondary timing chains and tensioners. If the chain … Read more