Well I have a nasty tap in my bottom end. One mechanic said lifters one said front rod bearing skated. So I took my cam cover off to inspect.. And I noticed the bigger can gear seemed to have a groove/lip worn into it. And its not a even lip around it. I slid in the cover and there is a good bit of up and down movement. I also noticed when verything was still together and it was running the little gold timing wheel was wobling a little bit. What do y'all think?