Rear Coolant Pipe, Removing and Installing

WARNING: This page is about a different car, the 2009 Audi S8, 2008 Audi S8, and 2007 Audi S8. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Hose Clamp Pliers V.A.G 1921

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Hose clamp pliers V.A.G 1921

Removing

NOTE:

All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation.

Remove engine → Engine, Removing .
Leave engine with transmission installed on scissor lift platform VAS 6131 A.
Remove left coolant pipe → Left Coolant Pipe, Removing and Installing .
Remove right coolant pipe → Right Coolant Pipe, Removing and Installing .

Fig 2: Identifying Nuts, Bolts, Electrical Connector On Engine Coolant Temperature (ECT) Sensor G62 & Coolant Hose

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove nuts - 2 - and - 4 - and remove connector bracket from rear coolant pipe.
Free up engine wiring harness on rear coolant pipe.
Disconnect electrical connector - 3 - on Engine Coolant Temperature (ECT) Sensor G62.
Disconnect coolant hose - 5 - from rear coolant pipe.

Remove bolts - 1 - and - 6 - and remove rear coolant pipe.

Installing

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

NOTE:

Replace O-rings.
During installation, all cable ties must be re-installed at the same location.

Clean or smooth O-ring sealing surfaces.
Install left coolant pipe → Left Coolant Pipe, Removing and Installing .
Install right coolant pipe → Right Coolant Pipe, Removing and Installing .
Install engine → Engine, Installing .

Tightening Specifications

Component	Nm
Rear coolant pipe to cylinder head	9
Connector bracket to rear coolant pipe	9