Not too easy. Not too difficult.
If you have been in mechanical engineering for a while, you know that you won't come out of this course able to take an entire engine apart. However, you will come out with a general understanding of engines (real world ICE is incredibly difficult), and you will be able to apply that knowledge not only in the real world but also in your own life which few courses in this major can actually say.
The greatest thing that I learned was that car companies are full of it, and the most effective way to measure engine performance between different engines is the BMEP because their advertised torque is total crap.
Hours per week:
Advice for students:
Go to class. You absolutely need to watch the videos that he plays in class to make the theoretical concepts more intuitive, especially if you don't know much about engines. Also, he is big on format so take the projects seriously and answer all the questions fully. You may think you have enough, but add more.