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 on a warm engine, part of the exhaust gases are directed into the engine combustion chambers, resulting in a decrease in combustion temperature and a reduction in the content of nitrogen oxides in the exhaust gases.
Figure 4.83. Exhaust system on vehicles with DW10TD engines: 1 - clamp, 25 Nm
The exhaust system components are connected with clamps, the mounting bolts of which must be tightened to a torque of 25 Nm (figure 4.83).
After servicing and repairing the exhaust system, check that the system is installed freely, without tension, with sufficient clearance relative to the body elements.
Caution! When removing the exhaust system, protect the connecting element in the exhaust pipe from any mechanical damage and contact with any corrosive products. The connecting element in the exhaust inlet pipe must not be bent at an angle greater than 20° or displaced by 20 mm in the axial direction and 25 mm in the radial direction, otherwise it will be damaged.
(Text taken from the website: PeugeotBook)
Before reinstalling the exhaust system components, clean the joints with sandpaper to remove any remaining sealant and rust.