EVAP canister/leak detection system, assembly overview: Notes

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2008 Audi S4, 2008 Audi RS 4, 2008 Audi A4, 2007 Audi S4, and 2007 Audi RS 4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: EVAP Canister/Leak Detection System, Assembly Overview

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1 - Cap nut, 9 Nm

2 - Cover

For EVAP canister

3 - Stud bolt, 16 Nm

4 - Sealing piece

5 - Ventilation line

From gravity valve at fuel tank
To remove, press release ring on EVAP canister

6 - Ventilation line

To evaporative emission (EVAP) canister purge regulator valve N80
To remove, press release ring on EVAP canister

7 - Air filter housing

For leak detection pump (LDP) V144
No maintenance schedule

8 - 4 Nm

9 - Vacuum line

To leak detection pump (LDP) V144

10 - Cable tie

To fasten vacuum line to bracket for leak detection pump

11 - Leak detection pump (LDP) V144

Component location: In left rear wheel housing behind wheel housing liner
Checking → Leak Detection Pump (LDP) V144 , checking (vehicles with MPI-engine)
Removing and installing → Leak Detection Pump (LDP) V144 , removing and installing

12 - Electrical harness connector

13 - Connecting hose

Leak detection pump/EVAP canister
Pressure side
To remove at leak detection pump, press release button on connection

14 - Connecting hose

Leak diagnosis pump/air filter

15 - Cable tie

To fasten hose to bracket of leak detection pump

16 - Sealing piece

17 - Cable tie

To fasten connecting hose to wheel housing

18 - EVAP canister

Component location: Bottom of spare wheel well
Vehicles as of 11.04: With EVAP filter EVAP filter - Vehicles as of 11.04
Removing and installing → Evaporative emissions (EVAP) canister, removing and installing