Hi Jerry and welcome to the forum! I've included a link to our site's DIY tech articles on the E46 platform, there are a few articles pertaining to the VANOS. If you need additional info, feel free to post a Comment just below one of the articles and our tech will get back to you with specifics. Hope this is a bit helpful and best of luck!
BMW E46 3-Series Technical Articles (1998-2005) - Pelican Parts