Or even here...
 

See now attached photo, fat fingers...

Cheers I was thinking about doing a brass one
Cheers Dave

Dave, hope this helps ...

Too many measurements to list so I've done you a drawing.

Attachment 13174

Should be pretty accurate but it's a difficult thing to measure with just a steel rule and a couple of small micrometers. Perhaps someone else could check/confirm the measurements.

I took the measurements from an aluminium one, same as the one in johnny_quattro's photo.

thank's mark. that's a great help it gets me in the ballpark.
cheers Dave

Just a quick follow-up post to a year-old thread - my A8L now has the aluminium part installed, which was done at the same time as the camshaft/timing belt. It's been a pleasant relief in so far as I don't have to keep checking the antifreeze level every couple of weeks. Over the 7 year period of my ownership of this particular A8L, I'd probably filled the expansion tank up with at least 2 containers worth of antifreeze (4 litres or 8 litres in total) due to the original plastic part developing a crack.

I'd left it this long as it was manageable and I also wanted to get the new aluminium part installed at the same time as all the other timing belt work being done.

I'm about to send for one of these. Anyone else interested?

Yes please 👍🏼

Hii Guys,
I can bring these aluminum pipes to the meeting. Is there interest? 18 pounds the piece (without seals).

If interested, I can also get the seals gladly. I'll just take a few sentences.

I'd be interested in getting the pipe and the seals if possible, so that I can have them handy should the need arise.

Ditto. After reading the Audipages guide I bloody well hope I DONT have to do this. But its a good insurance policy to have the stuff ready so please count me in for pipe and seals +++