Table of contents: Information ↓ Replacement of components ↓
Information
1. The EGR system consists of an EGR valve, a modulator valve and a series of vacuum hose connections.
2. The exhaust gas recirculation valve is mounted on a flange connection in the intake manifold and is connected by a hose to a second flange connection in the exhaust manifold.
3. The exhaust gas recirculation modulator valve is installed on the right front suspension tower on or on the bulkhead.
Replacement of components
Exhaust Gas Recirculation Valve
4. Disconnect the vacuum hose from the passage on the EGR valve (see illustrations).
5. Remove the bolts that secure the EGR valve to the intake manifold flange and remove the gasket. Discard it - use a new one when installing (see illustrations).
6. Remove the nuts that secure the semi-flexible connecting pipe to the exhaust manifold and remove the EGR valve assembly. Remove and discard the gasket - it must be replaced (see illustrations).
7. If necessary, remove the bolts and semi-flexible hose from the EGR valve. Remove and discard the gasket.
8. Perform installation in reverse order, paying attention to the following:
- a) Use new flange gaskets and self-locking nuts.
- b) When installing the semi-flexible hose, insert the fastening bolts, make sure that the pipe is not stressed, and tighten the bolts to the specified tightening torque Specifications.
9. Disconnect the wiring from the valve.
10. Mark the location of the vacuum hoses, then disconnect them from the valve.
11. Loosen the mounting bolts and remove the valve from the right front suspension tower.
12. Perform installation in reverse order.
Warning: Make sure the vacuum hoses are installed correctly.
[This publication is borrowed from the resource «AUDImanual»]