Audi AMB Service Manual page 617

ENGINE 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AMB
CAUTION: DO NOT pressurize the system above 0.5 bar!
Doing so may force oil into the intake system which can damage the
engine.
Slowly open outlet valve - 4 - (after gauge) to test hose connections.

Observe pressure gauge for a drop in pressure.

NOTE:
Some pressure will be lost past the throttle plate.

Readjust test pressure to 0.5 bar (CAUTION ) by turning regulator valve - 2 -.

Listen for any very large intake leaks.

If smoke generator was used to fill the system with smoke:
Inspect intake system connections for smoke at leaks.

NOTE:
An ultrasonic detector may also be used to detect extremely small leaks

where smoke may not be visible.
Repair any leaks found.

Remove tester.

Remove plug from crankcase ventilation hose.

Remove air pressure adapter.

With VAS5051 diagnostic tool connected:
Erase DTC memory.

If smoke generator was not used to fill the system with smoke:
Apply soapy water solution or equivalent to intake system connections.

NOTE:
An ultrasonic detector may also be used to detect extremely small leaks.

Inspect intake system connections for leaks.

Repair any leaks found.

Remove tester.

Remove plug from crankcase ventilation hose.

Remove air pressure adapter.

2005 Audi A4 Quattro
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