Meticulous Mouse For The Mule
Urban spends a lot of time honing the cylinders to achieve a very specific diameter and surface and then washes the block thoroughly. He grinds the ends of the rings to get the piston rings gapped for each cylinder (this engine has gaps of .018 inch on the top, .022 inch on the second), installs the rods, uses a ring spreader to install the rings on the pistons, lubes the piston-thrust faces with non-detergent 30-weight motor oil and slides them in. Notice on each piston he has written the cylinder number and thrust face.
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