Overview - Exhaust Gas Recirculation
WARNING: This page is about a different car, the 2015 Audi A7 Quattro and 2014 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
- Exhaust Gas Recirculation (EGR) Pipe
- To the intake manifold
- Tightening specification and sequence, refer to Fig 2.
- Bolt
- Tightening specification and sequence, refer to Fig 2.
- Seal
- Replace
- EGR Temperature Sensor -G98-
- 35 Nm Aluminum EGR Radiator
- 45 Nm Steel EGR Radiator
- Removing and installing, refer to EGR TEMPERATURE SENSOR -G98-, REMOVING AND INSTALLING .
- Bolt
- 9 Nm
- EGR Cooler
- Removing and installing, refer to EGR COOLER, REMOVING AND INSTALLING .
- Seal
- Replace
- Bleeder Screw
- Seal
- Replace
- Connection
- O-Rings
- Replace
- Seal
- Replace
- EGR Motor -V338-
- Pay attention to the installed position.
- With EGR Potentiometer -G212-
- Removing and installing, refer to EGR MOTOR -V338-, REMOVING AND INSTALLING .
- Bolt
- 9 Nm
- Bolt
- 9 Nm
- Engine Coolant Temperature Sensor -G62-
- Removing and installing, refer to ENGINE COOLANT TEMPERATURE SENSOR -G62-, REMOVING AND INSTALLING .
- Seal
- Replace
- Bolt
- Tightening specification and sequence, refer to Fig 3.
- EGR Pipe
- From the turbocharger
- If the screw-type clamp -21- was loosened, then the EGR pipe and the screw-type clamp must always be replaced.
- Tightening specification and sequence, refer to Fig 3.
- Seal
- Replace
- Screw-Type Clamp
- Replace
- Tightening specification and sequence, refer to Fig 3.
- Bolt
- 9 Nm
- O-Ring
- Replace
- Coolant Connection
- Bolt
- Tightening specification -item 7- OVERVIEW - COOLANT VALVE => List Item:Bolt .
- Screw-Type Clamp
- Replace
- Tightening specification and sequence, refer to Fig 2.
- Seal
- Replace
- The flange at the EGR pipe must not be wavy or bent.
-- Attach the EGR pipe with the seals and the screw-type clamps.
NOTE:
Coat the thread on the bolts with hot bolt paste. For the correct hot bolt paste
| Step | Bolts/Screw-Type Clamps | Tightening Specification |
|---|---|---|
| 1. | -1 and 2- | Turn them by hand until the bolt heads are touching |
| 2. | -3- | Position them as shown in the illustration 2.5 Nm |
| 3. | -1 and 2- | 9 Nm |
NOTE:
The illustration shows the installed position on a vehicle with a turbocharger.
Replace the EGR pipe and the screw-type clamp if the screw-type clamp was loosened.
Replace the bolts that were tightened with an additional turn.
-- Attach the EGR pipe with the seals and the screw-type clamps.
NOTE:
Coat the thread on the bolts with hot bolt paste. For the correct hot bolt paste
| Step | Bolts/Screw-Type Clamps | Tightening Specification |
|---|---|---|
| 1. | -2 and 3- | Turn them by hand until the bolt heads are touching |
| 2. | -1- | Position using the tab on the EGR pipe tightening specification.
|
| 3. | -2 and 3- | 5 Nm |
| 4. | -2 and 3- | Tighten an additional 90° |