I have an 2003 F150 4x4, 5.4L, Auto with 80,000 kms. The truck is babied and has always had regular oil changes.

I have a ticking sound coming from it that is mostly noticable when the engine is cold. Once the engine warms up it's not really noticable.

One person said it's a lifter, another person said timing chain.

Any thoughts?

Thanks.