Inspect exhaust pipes, catalytic converters (if equipped), mufflers, and tailpipes for cracked joints, broken welds, and corrosion damage that could result in a leaking exhaust system. Inspect the clamps, brackets, and insulators for cracks and stripped or corroded bolt threads.
The exhaust system, including heat shield, must be free of leaks, binding, grounding, and excessive vibration. These conditions are usually caused by damaged or loose flange bolts, heat shields, brackets, or pipes. If any of these conditions exist, check the exhaust system alignment. Align and replace the components as necessary.