Coolant leak driving me nuts

[a4ced]

So I've been chasing this problem for a while now. I'm losing coolant out of my 06 A4 2.0T Quattro. There's no antifreeze in the oil so it doesn't seem to be a head gasket, the turbo should be blowing smoke if I'm burning it which it doesn't seem to be, I just had the Temp sensor and temp sensor o ring replaced and I still seem to be losing coolant. It only occurs when driving, there is never a puddle under the car so it's not pouring out. Once a week or so I need to refill the whole resovoir.... I thought it was a heater core but the floor was dry in the car and I'm not having any heating issues. The only places I find coolant in the car are underneath it spattered basically everywhere and the puddle on top in the picture. If anyone can shed some light on this for me, I'd be very grateful.





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[Anton]

Had water pump replaced recently? I had to replace mine after change the timing belt as it was leaking, could not diagnose for a while. Additionally the rear flange is a common failure.

[fly300kts]

Rear coolant flange

Phil

[Hightekflytech]

Rear coolant flange

Phil

That's the typical leaking location of the rear coolant flange. Not fun to get to

[o1turbo30v]

+4, rear coolant flange.

[a4ced]

Can anyone point me to a DIY? I definitely need to get that fixed

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[fly300kts]

Can anyone point me to a DIY? I definitely need to get that fixed

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Sure = SEARCH

Phil

[Der Konig]

Sure = SEARCH

Phil

On a silver platter
http://www.audizine.com/forum/showth...ment-with-Pics
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[jcsa4]

Try this.
http://www.audizine.com/forum/showth...ment-with-Pics

If you have access to a lift it's much easier. Take a look from under the car and you will be able to see if that's where its leaking from. If it is the flange, I would think you would see a puddle under the car as much coolant as you say you are leaking. It could be the heater core, if it is you would smell it inside and you would probably get steam on the inside windshield.

[zeitmorder]

If the leaking is on the turbo-side rear engine bay. Definitely Rear coolant flange assembly.