In vehicles with diesel engines, a non-adjustable oxidation catalytic converter is used to reduce the toxicity of exhaust gases.
Reducing the content of nitrogen oxides in the exhaust gases of a diesel engine is achieved by installing an exhaust gas recirculation (EGR) system on the vehicle.
Through the EGR valve, when the engine is warm, part of the exhaust gases are directed into the engine combustion chambers, resulting in a decrease in temperature and a reduction in the content of nitrogen oxides in the exhaust gases.
Figure 4.41. Exhaust system: 1 - clamps, 25 Nm
(Article based on material from the website: www.PeugeotBook.ru)
The exhaust system components are connected with clamps, the mounting bolts of which must be tightened to a torque of 25 Nm (figure 4.41).
After servicing and repairing the exhaust system, check that the system is installed freely, without tension, with sufficient clearance relative to the body elements.
To make it easier to subsequently unscrew the nuts and bolts that secure the system, lubricate them with a high-temperature paste, such as Liqui Moly LM-508-ASC.
Before reinstalling the exhaust system components, clean the connection point with sandpaper to remove any remaining sealant and rust.
Caution! The connecting element in the front exhaust pipe must be protected from any mechanical damage. The connecting element in the front exhaust pipe must not be bent at an angle of more than 20°, or displaced by 20 mm in the axial direction and 25 mm in the radial direction, otherwise it will be damaged.