What is a difference between 2nzfe engine on corolla 02-07 and 2nzfe engine on corolla 09-13. They have a same engine number written on both the vehicles. I guess, earlier maybe VVT and later is VVT-I. someone kindly confirm if earlier is VVT or not. Where is Variable oil control valve located in 02-07 model. I guess, it has a place for Variable oil control valve filter but does it comes along with it. Does somebody has user manual for 2nzfe engine which comes on earlier corolla. I have 2nzfe manual which says that both the engines are VVT-I whereas we know corolla has introduced VVT-I recently. Physical differences on both the engines says that they are not same. Kindly comment ???