Coolant leak from rear of engine.

[Charlie Farley]

As in the title guys, found a coolant leak recently, not massive but over the course of 6-8 weeks it drops from max to just below min, also found water on the undertray when I removed it earlier this week.
having had a good old snoop with my led endescope I can see water leaking from a joint section just behind the top of the block, checked with parts diagram and it looks to be part 44, so I've ordered it along with O-rings, it may just be the actual seal or seals that are dripping but at £8.00 plus the vat seems bonkers not to replace the whole part.
I assume this part is attached to the block and water coolant passes throught it into block or vise-versa judging by the diagram.
Now the bigger question, this llooks to be a real pain to replace due to lack of access, is there a prefered method of removal/refit or just a struggle and swear at it plan, any info or thoughts chaps would be nice.
pic of the offending part (44):

 

[Tooty_Fruity]

Watching with interest as my has exactly the same coolant leak in the same location.

 

[Charlie Farley]

I had a cunning plan chap, why don't we just flip a coin to decide who should tackle the job first...lol.
Its not a stock part and none in uk stock at present so mines coming from the factory, so since I have ordered the part I suppose I best go first then.
From web searches I have done thus far it does appear to be a very common problem, but not seen any other cases on this forum, maybe a lot have the problem but choose to live with it or just ignore it until its really bad then take it to a garage to be fixed.

 

[Darren1983]

I have the same leak too. Looks like a right pain to do! Some point in the future il be doing or getting done the timing chain so I think that's when il be tackling the replacement.

 

[Charlie Farley]

well had another look at the problem and its deffo coming from the flange , not sure wether its an o-ring or just a hose leaking,either way its a real pain in the posterior to get at let alone change.
still to find a decent video of the repair either, may get a quote to get it done by my local specialist just to save the hassle and twisted fingers and knuckles...

 

[Tooty_Fruity]

Ok so it seems that its not that uncommon. Coolant Hose Flange part 44 or 06D121132c cracks with age or the seals fail. Part cost £8.76, Seals £1.75
But.. its a real pain to change!
With 2 hours labour, parts and coolant - £199.84 !

 

[Charlie Farley]

yep, that's what I was told chap, I have the parts ready to fit but have decided to wait for a while longer and get it done when I have my dual mass flywheel /clutch replaced in the new year, a very easy job with the bell housing out of the way.
thanks for the info tooty.

 

[WOMBLERULZ]

Hi everyone . Do anyone know where i can get a coolant silicone hose kit for my A4 B7 quattro 2.0L tfsi please as i have to replace the water thing on the back of the engine. HELP PLEASE

Sent from my SM-G965F using Tapatalk

 

[Sygh2k]

https://www.audi-sport.net/xf/threa...rear-coolant-flange-replacement-guide.305734/

 

[Donfero]

Ohhhh you're going to enjoy this one! It took me 3 days, lots of prayers, and a massive amount of cursing! Let alone the cuts on my hands and arms. If you're going to do it my advice you also change the heater hose.

 

[Charlie Farley]

Yep, its a knuckle scraper and arm twister indeedy.
At least its done now, another job well done.