A small ticking sound to sounding like a lawn.mower
My truck sounds like it has a manifold exsaust leak it went from making a small on 2008 Chevrolet Colorado
seek help at a muffler shop or local mech. ck with dealer 1st it might be covered under your 7yr 80k miles emmission warranty
2 more answers , 2 more comments
you could have a cracked or warped manifold
gasket could be cooked also. have inspected.