What are the signs of a cracked heat exchanger?
What are the signs of a cracked heat exchanger? A burner with a moving yellow flame can mean that the burner is dirty or that the heat exchanger is cracked. According to Exclusive Buyer Realty, "flames (that) flicker or lean more as the house fan comes on (a couple of minutes after ignition)," are possible signs of a cracked heat exchanger.". What causes a cylinder to leak out the tailpipe? Pressure will leak into the exhaust manifold and ultimately out the tailpipe. Will probably be more audible than felt at the exhaust pipe. Crankcase is pressurized, leading to air escaping...