Turbocharger, removing and installing: Removing

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.

Fig 1: Noise Insulation Tray Retainers

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Remove sound insulation - arrows -.

Fig 2: Locating Securing Bolts For Ribbed Belt Tensioner For A/C Compressor

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Loosen securing bolts of tensioning roller for ribbed belt of air conditioning compressor - arrows - , loosen ribbed belt and remove.

CAUTION: Air conditioner refrigerant circuit must not be opened.

Remove air conditioning compressor from bracket and secure to body with wire.

Fig 3: Identifying Turbocharger Bracket, Oil Return Line, Air Hoses & Banjo Bolt

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Unbolt turbocharger bracket - 2 -.
Unbolt oil return line - 1 - from turbocharger and move it clear to one side.
Remove air hoses - 4 - and - 5 - from turbocharger.
Unscrew - 3 - for pressure line.

Fig 4: Removing Engine Cover

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Remove engine cover - arrows -.

Fig 5: Air Cleaner Cover

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Remove air cleaner cover - arrow -.

Fig 6: Removing Bolts & Air Duct

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Remove bolts - arrows -.
Remove air duct - 1 - and - 2 -.

Fig 7: Disconnecting Wiring Connectors From

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Disconnect wiring connectors from:

EVAP valve (additionally remove EVAP valve from air cleaner housing)
Mass Air Flow sensor
Wastegate bypass regulator valve N75

Pull off hoses, move wiring clear and remove air cleaner housing - arrows -.

Fig 8: Removing Secondary Air Line

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Remove secondary air line. To do so, pull off hoses - arrows - and remove bolts - 1 -.
Remove heat shield on right of cylinder head.
Pull off hose at vacuum unit for charge pressure control valve on turbocharger.
Unfasten sleeve on coolant return hose.

Fig 9: Using Hose Clamp 3094 To Clamp Off Coolant Return Hose To Turbocharger

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Use hose clamp 3094 to clamp off coolant return hose to turbocharger.
Release hose clamp - 4 - and pull off coolant return hose from line to turbocharger. Line must remain connected to turbocharger.
Clamp off coolant supply hose at bottom of turbocharger using hose clamp 3094.

Fig 10: Using Hose Clamp 3094 To Clamp Off Coolant Return Hose To Turbocharger

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Remove bolts - 1 - and - 3 - of oil supply line.
Unbolt oil supply line - 5 - from turbocharger.

NOTE:

To avoid damage, do not bend decoupling element of exhaust system by more than 10°.

Unbolt catalytic converter from turbocharger - 6 -.
Unbolt turbocharger from exhaust manifold - 2 -.
Swivel turbocharger to one side, loosen retaining bracket and banjo bolt for coolant supply line on turbocharger.
Remove turbocharger.