Removal and installation of a final collector
Removing the exhaust manifold
1. Place the vehicle on a two post lift.
2. Disconnect the negative battery terminal.
3. Remove the air resonator (see relevant section earlier in this chapter).
4. Remove the air filter unit (see relevant section earlier in this chapter).
5. Remove the throttle (see relevant section earlier in this chapter).
6. Loosen the screws (1) exhaust pipe flange.
7. Press the exhaust pipe towards the rear of the vehicle.
8. Disconnect connector (2) oxygen sensor.
9. Remove the oxygen sensor using a special 22 mm socket (Mot. 1495-01).
10. Remove the top heat shield (3) from the exhaust manifold.
11. Loosen the nut and bolt (4) racks between the exhaust manifold and the cylinder block.
12. To remove a rack between a final collector and the block of cylinders.
13. To turn away fixing nuts and to remove a final collector.
14. Having placed the exhaust manifold on the workbench, unscrew the bolts (6) exhaust manifold lower heat shield.
15. Remove the lower exhaust manifold heat shield.
Installing the exhaust manifold
Note: Be sure to replace the exhaust manifold gasket with a new one after each removal, as well as the gasket between the exhaust manifold and the catalytic converter.
1. Clean and degrease the contact surfaces of the exhaust manifold with a cleaning agent (if it is reused) and cylinder heads.
Note: If the threaded studs were loosened during removal, apply a locking compound to their threads and tighten to 8 Nm.
2. On a bench, install the lower heat shield onto the exhaust manifold.
3. Tighten the lower body shield bolts to 12 Nm.
4. Install the exhaust manifold.
5. Tighten the exhaust manifold mounting nuts in the sequence shown in the figure to a torque of 23 Nm.
6. To establish a rack between a final collector and the block of cylinders.
7. Tighten the bolt (6) attaching the rack to the cylinder block with a torque of 21 Nm.
8. Tighten the nut (7) fastening the rack to the exhaust manifold with a torque of 21 Nm.
9. Install the upper exhaust manifold heat shield.
10. Tighten the upper heat shield bolts to 12 Nm.
11. Install the oxygen sensor using a 22mm socket (Mot 1495-01) and tighten to 45 Nm.
12. Connect the oxygen sensor connector.
13. Install the exhaust pipe flange nuts and tighten to 21 Nm
14. Install throttle valve.
15. Install the air filter unit.
16. Install the air resonator.
17. Connect the negative battery terminal.