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The piston was tapped into the cylinder, and the rod was guided down into place on the crankshaft journal. They had to work very carefully, because if the rod happened to damage the journal, a damaged crank would be very expensive to repair. These aluminum Ross rods were a little easier to install, because the rod bolts were threaded into the rod body after the cap was in place. Most rods have bolts pressed in, and the bolts can easily damage a journal unless the bolts are covered as they are set into place.