General information
1. The exhaust system of all models under consideration consists of three sections: intake, middle (intermediate) and back. The main elements of the system are: exhaust pipe, catalytic converter, mufflers (central and additional), connecting tubular sections, mounting clamps, as well as support brackets and rubber loops, through which the exhaust assembly is suspended from the bottom of the car (see resist. illustrations). Sections of the system are mated with each other by means of two clamp connections. The junction of the middle and rear sections of the system is spring-loaded, which makes it possible to compensate for the backlash that occurs during the movement of the car; in order to reduce the level of vibrations, a flexible insert is usually included in the receiving section of the system. Improper installation of components and sections of the system leads to an increase in the level of noise and vibration transmitted to the car body.
21.1a Components of the exhaust system for Z16XE / Z18XE engines: 1. Flexible downpipe section; 2. Lambda probe; 3. Downpipe; 4, 6. Connection points of the exhaust tract; 5. Central muffler; 7. Additional muffler; 8. Exhaust pipe
21.1b Z22SE engine exhaust system components: 1. Lambda probe; 2. Flexible downpipe section; 3, 6. Connection points of the exhaust tract; 4. Central muffler; 5. The middle section of the exhaust tract; 7. Additional muffler; 8. Exhaust pipe
21.1c Components of the exhaust system for Y20DTH/Y22DTR engines: 1. Flexible downpipe section; 2. Pre-silencer; 3, 6. Connection points of the exhaust tract; 4. Central muffler; 5. The middle section of the exhaust tract; 7. Additional muffler; 8. Exhaust pipe
21.1d Z22YH engine exhaust system components: 1. Flexible downpipe section; 2, 4. Connection points of the exhaust tract; 3. Central muffler; 5. Additional muffler (consists of two parts)
2. Regularly inspect the entire system for signs of corrosion, deformation and mechanical damage. Check fastener tightness. Violation of the tightness of the components and their joints is fraught with the ingress of exhaust gases into the passenger compartment, and also leads to difficulty starting the engine and uneven operation at idle and during acceleration.
3. To check the exhaust tract for leaks, start the engine and plug the exhaust pipe with a rag. Determine the location of damage, for which you can use a special spray. Evenly apply the composition to the elements of the exhaust system - in places of leakage, the composition will begin to bubble. Defective components and sections must be replaced.
4. When carrying out work on the exhaust system, the following instructions must be followed:
- a) Lubricate the fasteners to be loosened with penetrating oil or other rust-dissolving agent.
Note: If the system is severely corroded, a cutting torch may be required to separate sections of the system (alternatively, you can use a hacksaw or a pneumatic chisel - do not forget to wear safety glasses and gloves;
- b) Prepare the necessary replacement gaskets, suspension loops, clamps and fasteners in advance; when removing all seals and fastening elements, they must be replaced;
- c) The sealing surfaces of parts to be reinstalled must be cleaned with a wire brush or sandpaper. Lubricate the threaded part of the fastener with an anti-seize sealant before installation;
- d) When installing components, make sure that there is sufficient clearance between the sections of the system and nearby suspension / body elements. Pay special attention to the correct installation and secure fastening of heat shields (with appropriate equipment).
21.5 Flexible outlet section
5. When removing or disconnecting the downpipe, it must not be allowed to hang on the flexible section of the pipe (see resist. illustration). Bending the flexible section at an angle of 5-10°and twisting at an angle of±0.5°can lead to its damage and failure. For this reason, when performing appropriate work, it is necessary to fix the downpipe with a wire to the rigid elements of the bottom, if necessary, use the help of an assistant.
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