Note: Additional information about the exhaust system is available in Chapter 4.
1. The check should be carried out on a cold engine, so it is best to do it before the first trip of the day or no earlier than three hours after turning off the engine. Check the condition of the entire exhaust system, from the engine to the end of the exhaust pipe. Ideally, this check should be performed with the vehicle raised and easily accessible from underneath. Jack up the car and place it on secure supports.
2. Check the pipes and their connections for exhaust gas leaks, severe corrosion and damage. Check the condition and reliability of fastening of all clamps and rubber suspensions of the system.
3. At the same time, inspect the underbody of the vehicle for holes, corrosion, loose seams, and other defects that could allow exhaust gases to enter the vehicle interior. Seal all holes with a suitable sealant.
4. The exhaust system, especially its supports and hangers, are often the source of rumbling and other unpleasant sounds. Wiggle and tug the pipes, mufflers and catalytic converter. If these components come into contact with body or suspension components, replace their fasteners.
5. Inspect the wiring of the lambda probes installed on the intake pipes and behind the catalytic converter. If necessary, replace the wiring along with the sensors.
6. Inspection of the inner surface of the exhaust pipe allows you to determine the current operating condition of the engine. The composition of deposits in the pipe indicates the quality of engine settings. If the pipe is black and sooty on the inside, this may indicate the need to check the fuel system.