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At Station five the LS7 gets its crank sprocket. In order to avoid damaging the thrust bearing by hitting the sprocket onto the crank, GM uses 2000-psi of hydraulic pressure to install the sprocket onto the crank. Next the motor gets the cam sprocket, timing chain and the nylon chain dampener. As we talked about in our April LS7 engine story the LS7 uses a specific duel impeller pump. It is actually two pumps in one and handles engine oiling and scavenging duties. The impeller notches have to be lined up, again they have a custom tool for this that you can see in the picture.