I was going to ask if you used a double roller timing chain on your engine. Reason I ask is because some of the sets have oil pump shims with them. Similar to what ProTouring442 had mentioned the driverside shim can be flipped upside down and still bolt on. It will cut off 2/3's of the oil passage to the upper engine. Something to look into if you did have shims. Dont ask how I know.
