02. Since the engine was apart I took the opportunity to find out where top dead center (TDC) of the piston is; this way I could pull the cam out and install it at TDC. Shown is a Summit Racing degree wheel that I used to find out how far down the piston was in the hole at (TDC). It is important to see how far the piston is in the hole because it can be too high and hitting the valves or too low and lose compression. This also helps make sure the crank balancer has not spun.