I'm rebuilding a D16A6 block. It has really high miles (almost 300,000). I'm going to replace the oil pump but just for giggles I took apart the pump that came off of that motor and I also took apart a oil pump that came off of a D15B2. The D16A6 one showed normal wear, it should be replaced but the D15B2 one was MINT underneath. Could I use the D15B2 pump on my A6 block? I'll post pictures up if wanted.