if that sound goes away oil cap off, the p/o either got to much rtv on there and blocked the pcv holes up, or the spacer is blocking the pcv holes, or one of them.
once the cap is off if you put your hand over the vc hole you'll feel it sucking air in. another member had this issue and it blew the front main seal off on him.
this thread covers how to deal with this issue if your spacers cover the pcv holes. lots of pics. always good.
http://www.grandprixforums.net/threa...cover-breather!
pb fix thread if you dont have this yet. http://www.grandprixforums.net/threa...ck+photobucket