Hello, I have been having a problem with my UAZ469 4 cylinder overhead valve engine not getting any oil to the rocket arms. I had just installed a new Fram oil filter and have been told there are two types of oil filters. One is a "Full Flow" and the other "By Pass flow". Does anyone know what type of oil system a UAZ-469 has? I am thinking now I may have installed the incorrect filter and its causing my engine to have very low oil pressure at the rockers. My oil gauge is showing normal. Any help would be appreciated.