Measuring the block and Crankshaft

measuring the block included the bore size,  and as usual, tapering and ovality. Most of this work was done with the telescopic bore gauge. Hans explained to us that the skirts on the piston have more contact with the cylinder walls, as they have more area than the sides of the piston, therefore these contact points can wear out more, causing ovality.  The cylinders were each measured from three points A: top B: center C: bottom.  These measurements would represent any tapering that could be in the cylinders. 

The crank shaft was also measured for tapering, ovality and warping.  Before this, the crank shaft was cleaned thoroughly to prevent inaccurate measurements from dirt.  The crankshaft's contact points with the connecting rods and bearings were measured by measuring either side of the bearings for tapering, then measuring either sides of the diameter of these points for ovality.  the whole crankshaft was measured for warping.  Ovality of the main bearing contact points were measured with a gauge that measures the points by rotating the crank shaft, and checking weather the gauge changes at any time during rotation.