This animation of a 2CV engine, showing an exploded view over time, was done by Sahlia Med Nefaa as his end-of-study project at the Higher Institute of Technological Studies of Béja Department of Mechanical Engineering-Mechatronics in Tunisia in 2014.

It is interesting to see how the internal components work even if a few of the nuts and bolts are missing and add-on items like the breather neck and air filter are somewhat simplified.

And we presume he meant to say in titling the video that engine size is bored out to 633 cc and not 533.

Check it out here: