Flow of Diagnosis

1. Inspect exhaust system welds, clamps, insulators and insulator brackets for cracks or breaks. Shake the exhaust system to identify any exhaust-to-body/chassis contact.





2. Use a rubber mallet to lightly tap on exhaust components and heat shields to identify noise and vibration areas.






CAUTION: Do not restrict the tailpipe outlet for periods longer than ten seconds or engine damage may result. Allow engine to run a minimum of one minute between test periods.

3. Exhaust leaks are often accompanied by noises and exhaust fumes. Visually inspect the exhaust system to determine the locations of leaks.
^ When checking for exhaust leakage, inspect the entire system for burnout holes, split seams and corrosion.
^ Examine the underbody and heat shields for greyish-white or black exhaust soot which will indicate exhaust leakage at that point.
^ To magnify small leaks, restrict the tailpipe outlet.