An adjacent squirting coolant leak crack the exhaust. A two- inch line is seen on its right side duct. I don't know how long or when it cracked but notice the crack only when I remove the heat shield for cleaning. I can barely hear the sound of the exhaust leak. Anyhow, the car runs fine and strong except for a little overheating once in a while from a low coolant, yet to know why, but should I replace it right away?
Thanks