Pic. 5.17. Nodes of system of release of the fulfilled gases: 1 - receiving pipe; 2 - thermal screen of the exhaust manifold; 3 - diagnostic oxygen concentration sensor; 4 - sealing gasket of the exhaust manifold; 5 - exhaust manifold; 6 - control oxygen concentration sensor; 7 - gasket flanges of the catalytic converter of exhaust gases; 8 - catalytic converter; 9 - main muffler; 10 - pillows of nodes of the exhaust system; 11 - additional muffler flange gasket; 12 - additional muffler
Exhaust gases are removed from the engine through the exhaust manifold 5 (pic. 5.17), exhaust gas catalytic converter 8, exhaust pipe 1, additional silencer 12 and main silencer 9,
The control valve is installed on the exhaust manifold (basic) oxygen concentration sensor 6, and on the exhaust pipe - diagnostic sensor 3.
A sealing metal-reinforced gasket 4 is installed between the cylinder head and the exhaust manifold flange.
The downpipe is connected at one end to the flange of the catalytic converter of exhaust gases, and at the other end to the flange of the additional muffler. All flange connections of the system are sealed with metal-reinforced gaskets. The additional and main mufflers are made as a single element.
To reduce the transmission of vibrations from the power unit to the exhaust system and the body, a corrugated vibration-compensating bellows in a metal braid is mounted in the exhaust pipe.
The elements of the system are suspended from the body on five rubber cushions 10.
To protect the engine and the base of the body from heating by the elements of the system, a steel thermal screen 2 is installed above the exhaust manifold, thermal screens are also installed above other elements of the exhaust system.
The exhaust system does not require special maintenance. It is enough to periodically check the reliability of the tightening of the threaded connections and the integrity of the suspension pads. In case of damage to the elements of the system, through corrosion or burnout, they are replaced as an assembly, since the silencers and the converter, together with the pipes, are non-separable units.
Helpful Hint: Periodically check the exhaust system. If there is an increased noise level from the exhaust system, check its tightness. To do this, start the engine and inspect the entire system. By running your hand over the places of a possible leak, without touching the nodes, you will immediately feel the leakage of gases. If necessary, replace rusted and burnt parts.
Warnings: Allow the exhaust system to cool before repairing as the exhaust system becomes very hot when the engine is running. Exhaust gases are poisonous, their poisoning occurs imperceptibly, so be sure to open the gate before starting the engine in the garage!