Note: Additional information on the exhaust system is provided in Chapter 4.
1. The check should be done with 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, starting from the engine and ending with the exhaust pipe cut. Ideally, this check should be done with the car raised, when it is freely accessible from below. Jack up the car and place it on reliable supports.
2. Check the pipes and their connections for exhaust leaks, severe corrosion and damage. Check the condition and reliability of all clamps and rubber hangers in 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 openings with a suitable sealant.
4. The exhaust system, especially its supports and hangers, is often the source of rattling and other unpleasant sounds. Wiggle and tug the pipes, mufflers and catalytic converter. If these components come into contact with body elements or suspension parts, 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 together 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 the deposits in the pipe indicates the quality of the engine settings. If the pipe is black and sooty on the inside, this may indicate the need to check the fuel system.