A4 Quattro Wagon L4-2.0L Turbo (BPG) (2005)
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Tightening torques
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Remove hose - arrow - from vacuum diaphragm on turbocharger.
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Remove securing plate - 1 - over linkage on turbocharger.
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Loosen lock nut - 2 - .
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Pre-adjust bypass flap - 1 - via knurled nut - arrow - so flap can still just be turned by hand.
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Install lock nut hand tight.