UR quattro Front Brake Hoses/Rough Idle

Started by Lertz, February 03, 2011, 01:17:05 PM

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Lertz

Hello All, My 1985 quattro just failed a warrant due to cracked front brake hoses (both?). Called in to the local brake specialist in Wangavegas but they don't have a specific listing for the quattro turbo. Various listings for similar models (90 Coupe), 100/200 turbo's & non turbo's etc.

Can any one help with info on brands and/or part numbers of compatible parts - or is this a case of OEM part only......?? Or possibly a link to parts site/supplier who is in the know! What sort of mony should they be.....??

Also - while I am on line - my car has never really idled smoothly - just a bit lumpy which I understand they shouldn't be - should be nice and smooth.....?? Local mechanical knowledge is almost non exisitant and my knowledge is NIL! Again would appreciate some suggestions....

Thanks.

5-pot

I would suggest going through the vacuum hoses in the engine bay and make sure they are all in OK condition.  No cracks/splits, and are actually still hooked up.  That will help your idle, I suspect. 

I'm not sure on the brake hose front...  someone else will have to chime in here.
?The bravest are surely those who have the clearest vision of what is before them, glory and danger alike, and yet notwithstanding, go out to meet it.? - Thucydides (Ancient Greek historian and author, 460-404bc)

- 1990 Coupe quattro - R.I.P.
- 1988 90 quattro project... Sold
- 2005 Golf 2.0 TDI

John Stone

Here's a link to the best quattro supermarket I know of - http://www.quattrocorner.com/
Pete Reeve will be able to help but you'll have phone him, as he doesn't respond quickly to emails.
The rough idle could be a number of things but the best place to start is checking for air leaks.
Clean out the idle stabilisation valve at the back of the manifold and clean the inner sliding plate that controls air flow, with carb cleaner, it can get oiled up and stick in an older engine.
Check the idle switch on the throttle body is wired correctly, see if it makes things worse when disconnected. While you're at it, check the WOT switch activates the bulkhead solenoid with an audible click when manually rotating the throttle cable. This is critical for achieving full enrichment on boost.
Check is the idle adjustment screw on the throttle body, chances are the o ring is 26 years old. They go hard and don't seal to well over time.
If you want to debug electrical issues go to Phil Payne's site, he covers all the tricky stuff very well http://www.isham-research.co.uk/quattro/index.html also has an extensive data base of info covering most electrical and mechanical issues and how to resolve them too, very useful.
86 WR
04 A3
05 V50T5

Lertz

Thanks 5-Pot & John - will follow up those useful suggestions. Cheers.

GlenT

I would definitely buy OEM brake hoses.
I remember a few years ago when I replaced mine that some people here and in the UK were buying after market ones and having issues with length.
They would fit okay when installed but they were not long enough under full lock of the steering wheel.
So you'll need to check what calipers you have, as some cars have been altered and you wouldn't know. ie; are they the single pot or the twin pot Girling's?

FFS

#5
Hi Lertz, this might help. Audi won't give you out a part number normally unless you're buying the item. Well, they won't give ME the numbers when I've asked, I should say. But in any case, here're the numbers you'll be wanting. 

Front brake hoses for ur quattro up to chassis number 85 G 902400 are part number 433 611 707.
Front brake hoses for chassis 85 H 900001 onwards are part number 443 611 707C.
Same number for each side.

Rear brake hoses for ur quattro up to chassis number 85 D 902500 are part number 171 611 701L.
Rear brake hoses for chassis 85 E 900001 onwards are part number 893 611 775.
Again same number for the hose on each side.

I think go to a brake specialist and have some made up for the car there. Hoses will be as good and will be made to length to fit, and will be at probably less cost than Audi will do it for. Either take the car and get them to do it, or take the hoses off yourself and take them in if you want to do the work yourself. Be warned if you're doing it yourself, brakes on the ur quattro don't seem to be easy to bleed and you may end up, like I did, with the car at a specialist.   

If Audi don't have the parts (and even if they do) I recommend phoning Qualitats in Penrose Auckland, ph (09) 579-3710, they're damn good at ur quattro bits, and very reasonably priced. Will courier out overnight too.  :)

BB

I would just remove one of the hoses nd take it to partmaster or repco and see if its the same as a similar listing audi.
Aftermarket hoses will be fine as long as its the right hose at the right length.

As for the idle, with older audis the valve clearance closes up so you will need to do a compression test and see if they are all even.
You should do all the cleaning and vacume leaks checks the others have said but if its still not right remove the rocker cover and measure all the valve clearances. They can give a ok compression test sometimes but still have a tight valve.

My diesel (same valve design) would start up fine and go great till it got hot then it would start to fart and miss and loose power and idle rough. Was tight valves.
Just measure the gap and then get the shims ground down to give the right clearance.
The end is nigh, but the end of what is the question?

td19

You might contact Phil at Euroworks (09-837-7396). He had a set of hoses that had been ordered in for someone else. He was going to fit them on my RR but found the RR ones are different from the earlier models. So he may still have them.