Dear ??
Purchase a Motors Manual from e-bay & learn how valves-valve timing and engines (in general) work.
This manual will also have information on other vehicle functions and a good "first step" for you. A course at your local Jr. College would be next.
Some sites on the WWW are just extentions of Hobby Shops and don't have "real world" experience/professional training/knowlege etc.
For a novice; It's difficult to "sort through it" and know what to believe.
Hang in there & good luck.
