I got leaks up the wazoo!!!

[Ver]

First leak is the coolant leak which I'm pretty positive that it's coming from the rear coolant flange. I read the DIY on this. But can anybody confirm this for me? I found the leak in the back of the engine, there's a puddle of liquid built up in a little groove. If you look down at the cat, you can see it really good towards the lower end of the cat around the o2 sensor. That's the rear flange, correct?

The other one is underneath the front passenger seat. I touched the liquid and seemed like A/C condensation but I have that coming from its usual place up front, this one is directly underneath the front pass. seat. Another thing about it was that it's leaking from a pretty big area because I can see a drip here and a drip there simultaneously. What could this one be? I also started hearing this clicking noise coming from the same area as this leak when I go 50+mph.

The coolant has been pretty constant for a couple of weeks now, just haven't had the time yet, but this other leak all started today.

Any ideas? Thanks guys.

[absolutegtr]

First lea....definitely rear coolant flange.

Second leak, is you A/C. Taste it...what does it taste like?

[2003Qu4ttr0]

+1

And change your coolant temp sensor while you're at it.

[Ver]

wasn't planning on tasting but it had the consistency of water. But how would it end up all the way back there?

[Ver]

+1

And change your coolant temp sensor while you're at it.

would that be the one the clips on to the coolant tank?

[2003Qu4ttr0]

would that be the one the clips on to the coolant tank?

Not quite. This one is located on the flange itself. There is a DIY writeup in the DIY section of this B6 forum. You'll see it in the first image; the flange on the right is brand new and notice the green sensor sticking out on the one side. That's the sensor. They are prone to failure, so if you are getting the flange replaced make sure you replace the coolant temp sensor as well. It's a PITA to get the flange out, and believe me, this is one job you won't want to do twice. Depending on where you source the parts, the most you'll pay is $70??? I just did mine and flushed the cooling system while I was at it too. Here is the link to the writeup: DIY: B6 A4 - Rear Coolant Flange Change