This how-to relates to the RHD S2 Avants running R134A gas.
There appears to be one air con hose that commonly fails on the Avants. So here's a how-to to replace it and the CORRECT hose part number!
The hose in question goes from just in front of the brake master cylinder and through the inner wing to the air drier. They seem to develope pin holes for some reason right by the coupling nut.
This hose is a real problem to identify and put a part number to!! the parts diagram on Etka is a generic drawing and not applicable to the ABY Avants at all!! If you order the hose it 'appears' to be on Etka, you'll get the wrong one! A phone call to the local Audi dealer had the parts department phoning Audi technical, they are aware of the problem! and they suggested ordering another hose (which was also wrong!!) The only way to identify the hose is to remove the old one and hope it has a part number on it (which it did!).
The hose in question is the one that joins the pipe arrowed below:
So here's how to:
I loosened the wheel bolts first and then jacked up the right hand front of the car on the jacking point marked by the indent on the sill panel. Put an axle stand under the car to be safe!
Remove the RH under wing splash guard which is simple enough to do but you will need a male Torx driver to undo two screws.
Then undo the nut in the photo below:
There is another nut holding this hose in place right by where the steering arm comes through the inner wing. It was seriously rusted on my car and wouldn't take 11mm, 10mm or 9mm sockets. I think the nut is 10mm but the rust was really bad! I used an AF socket in the end which fitted it ok, but as I undid it, the nut sheared the stud clean off! :
The hose goes down to the front of the right hand wing to the air drier:
The hose that Audi parts tech suggested to order is the lower hose in this picture, the old correct hose above it:
And here's the correct part number of the hose, thankfully!! the hose had a number on it! :
The old hose had been repaired before at some point in time by what looks like an epoxy resin just before the nut:
Fit the new replacement hose using new O rings on each end of the pipe. The only other point worth mentioning is that the nuts at each end of the hose are very large! I didn't have a spanner big enough to get anywhere near them!! so it's either mole grips or an adjustable spanner time, unless you work on trucks and have spanners over 30mm!! The nut in the engine bay was very tight and took a lot to persuade it to let go! the nut on the air drier was a lot easier to undo.
The hose is part number 8A2 260 740AD and the two O rings are part number 8E0 260 749D. This hose IS listed against the RS2 but still not shown in the correct place in the parts drawing!
NEEDLESS to say that because I had a hole in my hose all the gas in the system had escaped! so I had no issues with undoing a hose whilst the system was pressurised!!! If your system still has gas under pressure, then I'd seek advise before breaking into the AC system!!!
Hope this helps!!
MartynF
94 ABY Avant RHD
*note added 08 08 03* this AC hose is now confirmed as also being the same one for ABY Coupes.
There appears to be one air con hose that commonly fails on the Avants. So here's a how-to to replace it and the CORRECT hose part number!
The hose in question goes from just in front of the brake master cylinder and through the inner wing to the air drier. They seem to develope pin holes for some reason right by the coupling nut.
This hose is a real problem to identify and put a part number to!! the parts diagram on Etka is a generic drawing and not applicable to the ABY Avants at all!! If you order the hose it 'appears' to be on Etka, you'll get the wrong one! A phone call to the local Audi dealer had the parts department phoning Audi technical, they are aware of the problem! and they suggested ordering another hose (which was also wrong!!) The only way to identify the hose is to remove the old one and hope it has a part number on it (which it did!).
The hose in question is the one that joins the pipe arrowed below:
So here's how to:
I loosened the wheel bolts first and then jacked up the right hand front of the car on the jacking point marked by the indent on the sill panel. Put an axle stand under the car to be safe!
Remove the RH under wing splash guard which is simple enough to do but you will need a male Torx driver to undo two screws.
Then undo the nut in the photo below:
There is another nut holding this hose in place right by where the steering arm comes through the inner wing. It was seriously rusted on my car and wouldn't take 11mm, 10mm or 9mm sockets. I think the nut is 10mm but the rust was really bad! I used an AF socket in the end which fitted it ok, but as I undid it, the nut sheared the stud clean off! :
The hose goes down to the front of the right hand wing to the air drier:
The hose that Audi parts tech suggested to order is the lower hose in this picture, the old correct hose above it:
And here's the correct part number of the hose, thankfully!! the hose had a number on it! :
The old hose had been repaired before at some point in time by what looks like an epoxy resin just before the nut:
Fit the new replacement hose using new O rings on each end of the pipe. The only other point worth mentioning is that the nuts at each end of the hose are very large! I didn't have a spanner big enough to get anywhere near them!! so it's either mole grips or an adjustable spanner time, unless you work on trucks and have spanners over 30mm!! The nut in the engine bay was very tight and took a lot to persuade it to let go! the nut on the air drier was a lot easier to undo.
The hose is part number 8A2 260 740AD and the two O rings are part number 8E0 260 749D. This hose IS listed against the RS2 but still not shown in the correct place in the parts drawing!
NEEDLESS to say that because I had a hole in my hose all the gas in the system had escaped! so I had no issues with undoing a hose whilst the system was pressurised!!! If your system still has gas under pressure, then I'd seek advise before breaking into the AC system!!!
Hope this helps!!
MartynF
94 ABY Avant RHD
*note added 08 08 03* this AC hose is now confirmed as also being the same one for ABY Coupes.
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