Catalyst 5 has two oxygen concentration sensors: diagnostic and main (manager).
A sealing metal-reinforced gasket is installed between the cylinder head and the exhaust manifold flange, which is common with the intake pipe.
The exhaust pipe of the additional muffler 1 is connected through a gasket 3 to the catalyst 5, and the exhaust pipe of the muffler is connected to the flange of the main muffler 15 using a movable hinge. A toroidal metal-graphite ring 12 is installed between the flanges of the muffler pipes forming a hinge, and the inner spherical surfaces are made in the flanges.
To reduce the transmission of vibration from the power unit to the exhaust system and the body, a vibration-compensating corrugated bellows in a metal braid is mounted in the exhaust pipe of the additional silencer.
Catalyst 5 is fixed with nuts on the studs of the cylinder head and additionally fixed on the engine with bracket 4 and clamp 6.
The elements of the exhaust system are suspended to the body on three identical rubber pads 9 and one original pad 14 of the rear mount of the main muffler.
To protect the engine and the base of the body from heating by the elements of the system, steel thermal screens 2, 7 and 8 are installed in front of the catalyst 5 and above the additional muffler 1. In addition to them, an additional heat-insulating shield is installed in the engine compartment, which protects the steering mechanism from overheating (not shown in the figure, since it is not damaged in operation and its removal during maintenance and repair of the car is not required).
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 exhaust system, through corrosion or burnout, they are replaced as an assembly, since the mufflers, together with the pipes, are non-separable units.
Pic. 4.10. Exhaust system: 1 - additional muffler; 2 - thermal screen of the neutralizer; 3 - laying of the exhaust pipe of the additional muffler; 4 - catalyst mounting bracket; 5 - exhaust manifold with converter assembly (catalyst); 6 - clamp; 7 - front thermal screen of the additional muffler; 8 - rear thermal screen of the additional muffler; 9 - additional silencer suspension cushion; 10 - bolt; 11 - collar; 12 - sealing ring; 13 - nut; 14 - suspension cushion of the main muffler; 15 - main muffler