Week: 5 installing heads and checking injector timing

This week we installed the heads and started the injection timing process. The picture below is the cam shaft and the roller assembly housing . the rollers ride on the sam and arms lift and lower the push rods witch pushes on rocker arms that pushdown on the injector and valves. the injector timing process was very confusing at first which was sort of discouraging at first but after a few tries and some research I am very comfortable with the process and the accuracy of it. our engine is slightly off oem spec but I was very happy with the results. I am excited to learn more next week and finding info on the shimming process to correct the injection timing.
one question I have is if and when are we going to learn about Jacobs brake? the book talked very briefly about it and its a possibility I over read a section about it but it seems to me it would fit in this chapter.

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