Water pump failure??

[Jaxonalden]

Plastic impeller? WTF? The plastic would have to be something special because I could just see the pressure those blades are under, bending and warping until the whole assembly comes apart (as in the photos below). I'm all for saving weight and making power, but doing it and sacrificing internal engine components and reliability?

I read the burping procedure when refilling the coolant after a complete draining. What a pain in the ass! If I remember right you fill what you can and start it revving to a certain RPM then shut down allowing the engine to cool and repeat about 100 times! Unbelievable!