Coolant pipe, removing and installing

WARNING: This page is about a different car, the 2009 Audi A4, 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Drip Tray For VAS 6100, VAS 6208

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Drip tray for workshop crane VAS 6208

Fig 2: Identifying Spring-Type Clip Pliers VAS 5024 A

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Spring-type clip pliers VAS 5024 A

Removing

CAUTION: Cover cap of expansion tank with rag and open carefully, as hot steam or hot coolant may escape when opening.

Open cap of coolant expansion tank.

Fig 3: Removing Engine Cover

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Remove engine cover - arrows -.

Fig 4: Identifying Exhaust Pipe Fasteners

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For vehicles with auxiliary heater, remove bolts - arrows - for exhaust pipe of parking heater/auxiliary heater on noise insulation.

Fig 5: Identifying Quick-Release Fasteners And Noise Insulation

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Loosen quick-release fasteners - 1 - and - 2 - and remove front noise insulation.
Remove quick-release fasteners - 3 - and remove rear noise insulation, if installed.
Drain engine coolant → Cooling system, draining and filling
Remove intake manifold → - 24 - MULTIPORT FUEL INJECTION (MFI)

Fig 6: Removing Bracket For Cable Connector From Coolant Pipe

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Remove bracket for cable connector - arrows - from coolant pipe.

Fig 7: Disconnecting Coolant Hose & Removing Bolts

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Disconnect coolant hose - 1 -.
Remove bolts - 2 -.

Fig 8: Disconnecting Coolant Hoses From Coolant Pipe

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Disconnect coolant hoses - arrows - from coolant pipe.
Remove bolt - 1 - and remove coolant pipe.

Installing

Installation is in reverse order of removal, note the following:

NOTE:

Always replace gaskets and seals.
Secure all hose connections using hose clamps appropriate for the model type .

Clean and/or smooth O-ring sealing surface before installing.
Moisten new O-ring with G12+ and push onto coolant pipe.
Install intake manifold → - 24 - MULTIPORT FUEL INJECTION (MFI)
Fill with coolant → Cooling system, draining and filling .

Torque specifications

Component	Nm
Coolant pipe to cylinder block	10
Coolant pipe to thermostat housing	10