The exhaust manifold bolts directly to the engine and bridges the gap between the engine block and the front exhaust pipe or the catalytic converter. When the engine is running it is burning fuel (gasoline) which produces fumes which are expelled from the engine into the exhaust manifold and out through the exhaust pipe. When there is a leak in the system the symptoms may appear as a noise such
. as ticking sound or a loud exhaust noise. Another symptom can be you will smell exhaust fumes in the car which can be deadly carbon monoxide. It is recommended to have a leaking exhaust system repair quickly and properly.