http://www.370z.comadmin@370z.comadmin@370z.comMike Kojimahttp://www.370z.com/MagazineArticles/tabid/57/articleType/ArticleView/articleId/14/Nissan-370Z-Review-Engine-VQ37VHR.aspx#CommentsFri, 06 Feb 2009 18:06:02 GMTFri, 02 Jan 2009 05:01:00 GMTf1397696-738c-4295-afcd-943feb885714:6The sad part is that there is no serviceable part except the DC motor on that valve train, if the valve gap is out of adjusment, you will need to replace the head. also using the wrong weight on the oil can make it very noisey, however it work wonderful, is very tough and can take abuse http://www.370z.com/MagazineArticles/tabid/57/articleType/ArticleView/articleId/14/Nissan-370Z-Review-Engine-VQ37VHR.aspx#Comments