Exhaust system: 1 - exhaust pipe bracket; 2 - gasket; 3 - pressure plate; 4 - receiving pipe; 5 - metallographite ring; 6 - catalytic converter; 7 - additional muffler; 8 - silencer suspension cushions; 9 - metal sealing ring; 10 - main muffler; 11 - clamp brackets
Note. On some cars of the first years of production, a catalytic converter was not installed.
The exhaust manifold of the engine is cast iron. The connection of the exhaust manifold and the intake pipeline with the cylinder head is made on six studs with nuts and sealed with a gasket consisting of two symmetrical parts. The exhaust pipe flange is connected to the exhaust manifold flange with four studs and nuts through a heat-resistant (metal-asbestos) gasket. An oxygen concentration sensor is installed in the lower part of the intake pipe in front of the converter.
The catalytic converter is located under the bottom of the car between the exhaust pipe and the additional muffler. A thermal protective metal screen is attached to the body above the converter. To reduce the transmission of vibrations to the body and reduce the load on the system during vibrations of the power unit, the connection of the exhaust pipe with the catalytic converter is made articulated (see fig.). Mobility and tightness of the connection is ensured by two springs installed under the coupling bolts instead of washers, and a metal-graphite sealing ring with a spherical outer surface. The flange of the catalytic converter attached to the exhaust pipe has a concave spherical surface, and the other flange has a convex spherical surface.
The connection of the neutralizer with an additional silencer is fixed. The connection of the main and additional mufflers is also made rigid, with a steel sealing ring. The fastening of the connection is provided by a steel clamp, consisting of two brackets.
The exhaust system is suspended from the body brackets on five rubber rings - pillows. The suspension pads of the additional muffler and the main muffler are interchangeable.