Series 2500, left side
1. Raise the vehicle and slide the safety struts under the frame.
2. Loosen the two rear engine protection mounting bolts and unscrew the two front protection mounting bolts, remove the protection.
Tightening torque 28 Nm.
3. Remove the muffler.
4. Disconnect the oxygen sensor connectors on the left side of the exhaust system, see p.p. Section 8-11 "Removal and installation of catalytic converter insulators".
5. Loosen the nuts (2) attaching the catalytic converter to the exhaust manifold. Tightening torque 50 Nm.
6. Separate the catalytic converter from the exhaust manifold.
7. Slide the catalytic converter (1) from the suspension bracket loop.
8. When replacing the catalytic converter, perform the following operations, otherwise proceed with installation.
9. Remove the insulator (3).
10. Remove oxygen sensors (1) And (4).
Tightening torque 42 Nm.
11. Installation is carried out in the reverse order.
Attention: before installation, carefully clean the threads of the sensors and their seats, then apply a special non-stick compound to the threads of the oxygen sensors.
Series 2500, right side
1. Follow the steps in p.p. 1-7 sections "Removal and installation of the catalytic converter insulator".
2. Remove the muffler.
3. Remove the automatic transmission support cross member.
4. Loosen the nuts (2) attaching the catalytic converter to the exhaust manifold.
Tightening torque 50 Nm.
5. Separate the catalytic converter from the exhaust manifold.
6. Pull out the hook (3) suspension of the catalytic converter from the bracket.
7. When replacing the catalytic converter, perform the following operations, otherwise proceed with installation.
8. Remove the insulator (1).
9. Remove oxygen sensors (2) And (3). Tightening torque 42 Nm.
Removal of oxygen sensors, series 2500 right side
11. Installation is carried out in the reverse order.
Attention: before installation, carefully clean the threads of the sensors and their seats, then apply a special non-stick compound to the threads of the oxygen sensors.