Special tool VAG 1687/1 pressure adapter, installing (1.8L Turbo)

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, and 2003 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Separate intake hose from Mass Air Flow (MAF) sensor assembly.

Fig 1: Special Tool VAG 1687/1 Pressure Adapter, Installing (1.8L Turbo)

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Insert VAG1687/1 pressure adapter in intake hose - black arrow - using existing clamp (as shown).
Remove crankcase ventilation tube from intake hose at - white arrow -.

NOTE:

To help find small leaks, BEFORE pressurizing the system fill system with smoke using special tool KLI9210 and adapter KLI9210/50 as described on.
An ultrasonic detector may also be used to detect extremely small leaks where smoke may not be visible.