I have my valve covers off checking lash and installing pent roofs. I happen to notice this discoloration on one of my pushrods, which appears to be a crack. Its starts right at the cup joint and travels down and left about 1/4 of the way around the rod. Just down from the cup line (just to the right of the vertical flash glare) I can barely feel a tiny surface imperfection with my fingernail. Do I call Smith Brothers and get a replacement, or am I sweating the small stuff? Engine has 3k miles on it and all the others are fine.
