mechanical design -- cam timing chain versus gear-driven hey all, I am a mech-e student, but I am still in the infancy of my degree, so I havent really had any courses pertaining to this sort of thing, but having work with cars for a number of years, and having what I consider a strong mechanical inclination, I have a knack at identifying an area where I could see something being done a different way. That being said, I obviously can't know without seeing the rest of the engine, what other factors might affect the design of the valve body. But, I was wondering, looking at this picture, can anyone say what might be the advantages or disadvantages for using a solid gear which contacts the other two directly, rather than via a timing chain? is there any advantage to using a time chain in regards to how it handles the torque? it seems to me that the tight fit of a gear on gear mechanism, provided they fit together well, would be much more mechanically sound. Am I missing something? I look forward to discussing it!