[Yo-Yo]

It is engineered to last the engine’s lifetime under normal operating conditions.

While true that timing chains can far outlast timing belts, and most can last the lifetime of the engine, many manufacturers introduced plastic timing chain guides that do wear out just as fast as a timing belt, and do need replacing.

This includes the Ford 5.4 Triton engine.

[ProtectOurFreedom]

Thanks. Those plastic chain guides drive me nuts.