Hi All, Long time lurker first time poster here. My 2011 Edge has around 87k miles on it and recently had to replace the PTU at 80K miles. I was quite unhappy with that and ever since this car has put me on "edge." 1) I hear a clanking noise after I drive the car and the car is turned off from the engine. It sort of like expanding and contracting noise of metal. I figured the engine is hot and its cooling, but its quite loud? Is it a cause for concern? 2) I started having a musty smell from the car, its been there, but I had the cabin filter and air filter replaced recently....not sure what that can be? I hope its not the PTU leaking again! thanks for your help!