摘錄他網頁有一段的說明,似乎談到說改裝Hi-Cam也會容易造成VANOS異音?(因為整篇涉及太多專有名詞,小弟透過google翻譯仍不甚了解原意)
Performance cams like the cams on the US E46 ZHP or aftermarket performance (Schrick) cams create stronger camshaft lash forces and thus are more susceptible to causing a rattle.