coolant leak from HELL!!!

[SmokdOutA4]

so i have had a pesky little coolant leak for over a month now and i have just been dealing with it putting more coolant in....after looking at it its coming from the coolant sensor on top of the rear coolant flange. took it out changed the o ring twice now first time same thing, this go round i had to pull over in a parking lot bc it was over heating! im so aggravated! i guess im just gonna tow it to the dealer tomorrow....i just want it over with

[7speed]

I replaced my I rear coolant flange in about 3 hours.

[AudiSeefu]

yeah, sounds like it is definetely the flange.

[A4ringedONE8T]

How come you didn't mention it earlier? Probably the coolant flange as said and changeable in about an hr

[SmokdOutA4]

its not leaking on the block though its running down the flange and dripping on the tranny....its definitely coming from the sensor bc the o ring isnt sealing right at all

[A4ringedONE8T]

Don't tow it to the dealer, bring it to me, we'll take care of it (and for much cheaper). The flange's do crack where the quick fittings clip in, we are actually changing out a flange on a B5 tomorrow. Thought it was a hose (which one was cracked) but the flange is cracked as well.

[SmokdOutA4]

im gonna put the old o ring back in tonight as i was at least able to drive with that one......a tow to sarasota is gonna be rough on the pocket

[A4ringedONE8T]

No AAA?

[SmokdOutA4]

not i sir....maybe my mom but i dont think so

[chimchongdlight]

ok so i think i have this problem too, where is this so called flanged located? i have a coolant leak too, and as i look for it, i see it in the back of the motor near the firewall, looks like a plastic thing from a sensor that plugs into, now is that what u guys are talking about? are there any pics? bc i need this done asap, i went thru two gallongs of g12 in two months

[J-jizzle]

ok so i think i have this problem too, where is this so called flanged located? i have a coolant leak too, and as i look for it, i see it in the back of the motor near the firewall, looks like a plastic thing from a sensor that plugs into, now is that what u guys are talking about? are there any pics? bc i need this done asap, i went thru two gallongs of g12 in two months

Look on the B6 DIY page and there is a write up on changing the flange. Took me a lil over hour but time could chance depending on your tools at hand.... Sounds like it is deff. your rear coolant fange. Part is about $20 from the dealer I think.

[chimchongdlight]

ok so what is the specific name of the part so i can go buy it? o and also i drive a b 5, will it be the same or wat?

[quat]

How come you didn't mention it earlier? Probably the coolant flange as said and changeable in about an hr

An hour? Christ! it took me a knuckle busting 5 hours yesterday.

[qdogg]

Just did mine a few weeks ago. Same symptoms. Took a few hours to get it out, but was much easier to put new one in.

[J-jizzle]

ok so what is the specific name of the part so i can go buy it? o and also i drive a b 5, will it be the same or what?

"Rear Coolant Fange"... Someone correct me if I'm wrong but it should be the same for B5's also. But have your VIN number when you go, because the parts guy said the style changes a little depending on the year.

[A4 TSCHUSS]

its not leaking on the block though its running down the flange and dripping on the tranny....its definitely coming from the sensor bc the o ring isnt sealing right at all

dripping on the transmission is exactly what it will do when the flange is leaking. Mine did the same thing, there is an o-ring that is set in a groove and there is a thin wall that holds the o-ring in place which cracked on mine so it was leaking. Others have had the actual flange crack. I bought a new flange from the VW dealer by telling them what my car was and they had them (from a Passat), it's a little cheaper than the Audi dealer.

Here ya go click

[I Audi5K I]

funny story, just happened to me this morning....$371.00. shoot me in the face.