Can't Get To Inside Bolt Of Downpipe

[driftin jo]

http://cgi.ebay.co.uk/PROF-5-PC-10-1...item45edf755a8

[david]

cheers driftin jo,just what i was looking for.

[Nero]

17 and the difficult one is 15.

I would buy a single spanner, and make the angle bigger than the Facom one.

I know I have a picture of my spanner. Have used it on about 7 S2 clutchswaps now. But can't find the picture now.

EDIT: Had a moment of clarity, Audi has a special tool for this bolt, took a screenshot of the manual:

[david]

right,so the difficult one is 15mm.i thought they were all 17mm,nearly wen't out and bought 17mm.
thanks for clearing that up.

[K Simmonds]

Yep, the hard to get to one should be a 15mm, although I encountered a 17mm there when I removed my old down-pipe. I modified this old crappy spanner, works quite nicely.

[Nero]

After reading the manual, Audi didn't make a special tool, they advised to bend a standard spanner. Amateurs!

[Phil Payne]

them bolt's are 17mm in't?

Ex-factory, probably.

The nuts securing the turbo to the manifold - perhaps because of urq tradition - were horrendous technology and evilly expensive. Around twenty quid each - 035 145 749. Whatever - they were austenetic and didn't give a stuff about magnets. Try picking one up with one. Anyway, these things were made of some ridiculously high-tensile alloy to allow an M10 thread nut with a 15mm cant to hold the torque.

For the sake of simplicity (and because of the monkey lads messing things up) Audi started supplying this nut instead of N 102 090 05 - the original downpipe flange nut. So factory 17mm downpipe flange nuts became 15mm after any "enemy action".

Then - IMO - life got amusing. Apart from the temperature sender under the hydraulic pump on an MB, there are NO 14mm nuts on an urq. When I'm mobile, I carry no 14mm spanners or sockets - just a flare nut spanner for the fuel feed line. So when Pete Reeve at quattro corner send me eight nuts for an MB rebuild and they were 14mm I was non-plussed.

I couldn't resist it - I got a scrap manifold and an old WR turbo support bracket the same thickness as a turbo flange, and a recording torque wrench.

Audi is right. In nearly three decades, metallurgy has moved on.

[david]

Yep, the hard to get to one should be a 15mm, although I encountered a 17mm there when I removed my old down-pipe. I modified this old crappy spanner, works quite nicely.

what did you nibble that away with, grinder?
great piece of engineering there mate.

[K Simmonds]

Did it with a bench grinder, as you can see I've shortened it as well, that way I could move the nut about a 1/5 of a turn at a time without the head getting in the way. I seem to remember I removed the heat-shield and metal inlet pipe as well.

[PaulJ]

nuts

You can always consider putting back together with hi temp K-Nuts (Aerospace nuts) as per the vast majority of racing cars use, M10 nut M12 spanner, just used them on my last rebuild, Standard crescent wrench then fits no probs, Got them from 034, not cheap then quality never is

[LHD_Kid]

It's also possible to do this nasty nut with a fully standard 15mm spanner, you just need to withdraw the starter motor a bit and move it out the way...

If you do that, remember to disconnect the battery first.....

Just in case you don't get your spanner bent...

Chris

[Rusty]

You need a Steph (ask 4wheeldrifter)

[s2driveruk]

right,so the difficult one is 15mm.i thought they were all 17mm,nearly wen't out and bought 17mm.
thanks for clearing that up.

was confirmed in post 3... :