>>>*Note that the timing chain has side plates. The side plates, or links if you will, are designed to actually bed in until the rollers themselves contact.

The passenger side is loaded, as is the tensioner facing, so two grooves will form quickly in operation. The center area between the links where the roller itself rides in oil should show little if any wear, the two grooves will be quite noticeable.

This is perfectly normal, and it adds stability to the timing chain as it operates.

If the wear is ragged and appears wider than it should be, then suspect the tensioner. That tensioner design is very susceptible to any dirt, debris, or particles and can stick. If it does, the guides wear rapidly......*EB