07 A8 D3 coolant leak 4.2

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Apr 28, 2024 | 01:45 PM

pelletman

Thread Starter

AudiWorld Member

Joined: Sep 2006

Posts: 229

Likes: 13

From: Central Massachusetts

07 A8 D3 coolant leak 4.2

I have a small leak coming from the rear center of the engine that drips down on the passenger side USA and is coming off the transmission. I have dye in the coolant and an awesome blue light, but I can't see the origin. Anyone have any idea what might be leaking here? Thanks for your help!

Apr 29, 2024 | 07:10 AM

Salcidomd

AudiWorld Junior Member

Joined: Nov 2020

Posts: 14

Likes: 1

From: Berea, Kentucky

One thing I found

I found a leak in mine but it was closer to the passenger side it was the small “hose” between the oil cooler and engine block. There are tubes that run under the intake as well.

Apr 29, 2024 | 05:30 PM

Sci-fi_Wasabi

AudiWorld Member

Joined: Oct 2012

Posts: 425

Likes: 51

From: Chicago

This plastic Union adapter breaks down and leaks right on top of the transmission. This is an 09 , maybe the 07 is set up different.
https://www.audiworld.com/forums/a8-...ypass-3060682/