2. Inspect the system pipes and couplings for signs of exhaust gas leakage, excessive corrosion, or other damage. Make sure that the system hangers and their brackets are suitable and securely fastened (see illustrations).
20.2a. Inspect the muffler muffler (A) and all the suspensions (IN) systems for signs of destruction
20.2b Inspect system flange connections for signs of exhaust gas leakage
3. Make sure that the surface of the underbody is intact and in satisfactory condition, as this prevents the penetration of exhaust gases into the vehicle interior. Apply automotive putty or silicone sealant to areas where exhaust gases may leak through the underbody.
4. Elements of the exhaust system make a knocking noise when their fasteners or connectors are loosened, this especially applies to the suspensions and brackets of the system. By moving elements such as pipes, catalytic converter and mufflers, determine the maximum amplitude of their vibration on the system hangers. If elements come into contact with the car body, replace the corresponding hangers.