Contents: Removal ↡ Installation ↡
Cars with gasoline engines.
Warning! Jacking up and jacking up a vehicle may present a risk of injury. Read the safety precautions in Chapter "Jacking up a car".
Removal
1. Place the vehicle on jack stands.
2. Disconnect the lambda probe plug(s), see the relevant chapter.
3. Disconnect bracket 1 of the inlet pipe mounting (see illustration).
4. Unscrew the bolts securing the flange between the catalytic converter I and the inlet pipe 2 (see illustration).
Caution! Depending on the engine design, the flange joint may be secured with bolts or clamps. When using bolts, check the condition of the blind nuts 3 and, if necessary, replace them with new ones by knocking them out with a suitable punch and holding the clamp. Install new fixed nuts, tightening them to the stop with a suitable flange bolt (see illustration 4.4).
5. Unscrew the nuts of the inlet pipe from the exhaust manifold and remove the pipe by pushing it down.
6. Unscrew the heat shield nuts and remove it together with the intake pipe gasket on the exhaust manifold.
7. Check the condition of the threads of the exhaust manifold mounting studs on the cylinder block. If the threads are damaged, the studs should be replaced with new ones.
Installation
8. Install and secure the heat shield together with the new exhaust pipe gasket.
9. Screw the intake pipe to the exhaust manifold with new nuts and tighten them to a torque of 40 Nm.
10. Install a new gasket and attach the catalytic converter to the intake pipe. For a threaded connection, the tightening torque is 25 Nm.
11. Screw in the front exhaust pipe bracket.
12. Check the condition of the rubber mounts of the exhaust system suspension and make sure that the exhaust pipes are pulled forward by a=15 mm.
If this is not the case, then you should loosen the mounting bolts and straighten the pipes in the suspension (see arrow in illustration).
13. Connect the lambda probe plugs.
14. Lower the car onto its wheels.