The connection of the main and additional mufflers is rigid, with a steel sealing ring.
The exhaust system is suspended from the body brackets on four rubber rings - pillows. The suspension pads of the additional silencer and the front suspension of the main silencer are interchangeable. The rear suspension cushion of the main muffler is reinforced.
Exhaust systems for cars with injection engines models 2112 (l,5i) and 21124 (l,6i) similar to each other, but have a number of differences.
Features of the exhaust gas system of the VAZ 2112 engine (l,5i)
Injection engine VAZ 2112 (l,5i) complies with EURO II emission standards.
The exhaust manifold of the 2112 engine is cast iron. The connection between the exhaust manifold and the block head is sealed with a two-layer metal gasket. The exhaust pipe flange of the muffler is connected to the exhaust manifold flange with six studs and nuts through a heat-resistant (metal-asbestos) gasket. The catalytic converter is located under the bottom of the vehicle between the exhaust pipe of the silencer and the additional silencer. The bottom of the car is protected from heating by a metal screen installed above the converter. The oxygen concentration sensor is installed at the bottom of the intake pipe in front of the converter. The connection of the intake pipe and the neutralizer is made articulated.
Features of the exhaust gas system of the VAZ 21124 engine (l,6i)
Engine 21124 (l,6i) Depending on the configuration, it meets the EURO II or EURO III standards for exhaust gas toxicity.
The exhaust manifold of the engine 21124 is steel. The catalytic converter is combined with the exhaust manifold into a single unit - the catalytic manifold (collector). This reduces the catalyst warm-up time to operating temperature and increases its efficiency. Two oxygen concentration sensors are installed in the catalytic manifold - before and after the converter (in the EURO II version, one oxygen concentration sensor is installed, in front of the neutralizer). The connection between the catalytic manifold and the exhaust pipe of the muffler is sealed with heat-resistant (metal-asbestos) gasket. The connection of the exhaust pipe of the silencer and the additional silencer is made articulated.
Warning. It is possible to start repairing the exhaust system or perform work near it only after the system elements have cooled to a safe temperature (not higher than 45°C).
Exhaust system for VAZ 2110, VAZ 2111, VAZ 2112: A - engine 21124 (1,6i); B - engine 2112 (1,5i); 1 - sealing gasket of the catalytic manifold; 2 - catalytic manifold; 3 - clamping plate of the catalytic manifold mounting bracket; 4 - sealing gasket of the intake pipe; 5 - sealing ring of the intake pipe; 6 - additional muffler; 7 - suspension cushions for the additional muffler and the front part of the main muffler; 8 - spring of the coupling bolt; 9 - swivel coupling bolt; 10 - receiving pipe; 11 - locking plate of the intake pipe fastening nut; 12 - catalytic manifold mounting bracket; 13 - muffler sealing ring; 14 - main muffler; 15 - a pillow of a back suspension bracket of the muffler; 16 - additional muffler; 17 - clamp brackets; 18 - catalytic converter; 19 - receiving pipe; 20 - pressure plate; 21 - sealing gasket of the intake pipe; 22 - bracket