2. Check pipes and their connections for signs of leaks and/or corrosion indicating a potential failure. Make sure all brackets and hangers are in good condition and securely tightened.
3. At the same time, inspect the underbody for holes, corrosion, cracked seams, and similar damage that allows exhaust fumes to enter the vehicle interior. Seal all holes in the bottom with body putty or silicone compound.
4. Rattles and other noises often occur in the exhaust system, which can be caused by loose fasteners and hangers. Try to move the pipes, muffler and (where installed) catalytic converter. If the components may come into contact with the body or suspension parts, attach the exhaust system with new fasteners (photo).
Check exhaust system rubber mounts for cracks and heat shield bolts (where installed) for tightening strength
5. Assess the current condition of the engine by looking at the inside of the exhaust pipe end. If the surface is black and sooty or covered in white deposits, the engine needs a tune-up, including a complete inspection and adjustment of the carburetor.