Lower Front Suspension Arm - DIY or NOT?

Hi folks
I need to change the front lower right-hand side suspension arm on my recently acquired 2002 A2 1.4 petrol
It is fitted with the older solid type of arm with the ball joint built into it - it is the ball joint that is the problem as it will not pass an upcoming MOT
Is this a realistic DIY for a reasonably competent home mechanic or is it better to just take it on the chin and bring it to the local garage?
I have checked all the bolts I can see and dosed them with penetrating oil ready to tackle at the weekend but don't want to start a job I can't finish and immobilise the car
Any thoughts or advice would be greatly appreciated
Thank you
 
I have recently done this job folllowing the guide here on the forums. This gives a good idea of the tools that are required. Due to removing parts of the subframe which are held in with torque to yield bolts allocate another £20-£30 to the cost of parts as pretty much any bolt that you take out to follow this guide is not reusable. Your local VW/Audi garage (or TPS) will be able to source all the bolts for you.

Per the guide, make sure that you only undo one side at a time so that the subframe doesn't move around on you.


On one side I had to replace the console bushing too as this was damaged and therefore I couldn't press the new control arm in. This requires a press tool to remove the bushing and then press in the replacement one. Also be super careful with the big bolt that runs through the wishbone into the aluminium console, these are liable to strip the threads from the console, penetrating oil is your friend.
 
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Hi Belleek,
Yes, it's a DIY job if you have the right tools ... make sure that none of the bolts are seized before ordering any parts and proceed as you have done with the WD40 prior to starting ... if the bolts come out without issue then it's straight forward ... a set of locating pins are very useful to maintain the position.
Best of luck ... Tom
 
Attempted this yesterday. My plan was to swap the whole subframe with wishbones from a breaker I have here with the cast arms, onto my own car with very crusty pressed arms.

On the breaker someone had been there before me and had used an air gun to tighten up every bolt on the subframe. I know someone had been there before, because 2 of the bolts that came out were covered in copper grease. Because they had been air gunned, despite me soaking them in wd40 beforehand undoing them snapped the captive nut on each bolt meaning they had to have the heads cut off to remove the subframe from the breaker.

At this point I thought to change the wishbones from the donar car onto my car. I started by undoing the wishbone to console bolt which also snapped. At this point I threw a wobbly and left the job there.

In theory the wishbone change and indeed most jobs on the A2 are not that difficult, but throw in 20 years of corrosion and it completely changes the game.

I’ll be changing the hubs and suspension myself and putting it into the garage for the wishbones.
 
Attempted this yesterday. My plan was to swap the whole subframe with wishbones from a breaker I have here with the cast arms, onto my own car with very crusty pressed arms.

On the breaker someone had been there before me and had used an air gun to tighten up every bolt on the subframe. I know someone had been there before, because 2 of the bolts that came out were covered in copper grease. Because they had been air gunned, despite me soaking them in wd40 beforehand undoing them snapped the captive nut on each bolt meaning they had to have the heads cut off to remove the subframe from the breaker.

At this point I thought to change the wishbones from the donar car onto my car. I started by undoing the wishbone to console bolt which also snapped. At this point I threw a wobbly and left the job there.

In theory the wishbone change and indeed most jobs on the A2 are not that difficult, but throw in 20 years of corrosion and it completely changes the game.

I’ll be changing the hubs and suspension myself and putting it into the garage for the wishbones.
Agreed Steve ... approach with caution and make sure nothing is seized up before you commit otherwise leave it to a professional ... I'm possibly one of the lucky ones on this forum as I know the full history of my car.
 
Thanks folks - definitely worth a go I think

Does anyone have the part numbers for the bolts that I will need to replace and where is a good place to source them online as I am 90 minutes away from the nearest Audi dealer - would a VW dealer stock them if a similar system is used in a Polo or something like that?
 
Thanks folks - definitely worth a go I think

Does anyone have the part numbers for the bolts that I will need to replace and where is a good place to source them online as I am 90 minutes away from the nearest Audi dealer - would a VW dealer stock them if a similar system is used in a Polo or something like that?
I bought all of them from my local VW dealership (skoda or seat garage will probably help too), they will likely have to order the parts in (they are used on the polos from the same era but I don't think that main dealers see cars that old often so they likely don't have stock) but my local garage were very helpful and got all the parts in for the next day. They have access to the audi parts diagrams as it is common to VW group

 
Yes, it's definitely doable ... if you leave one side in position the subframe doesn't move ... draw around the console and mark the location before you remove the bolts and you should be able to manoeuvre it back into the same position, this is how I done it before reading about the locating pins.
 
That's great Tom - good to see a few NI based members in the club - I am way down in Fermanagh so one of the more westerly A2's in the UK!
 
... I did buy a set of pins out of curiosity but they are only really useful for locating the console to the subframe in it's current position and before you move anything ... they aren't designed to locate into a 'factory' setting.
 
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Hi folks
Just tackling this job today and the long bolt at the front of the old wishbone has snapped on me!!
Any ideas for how to solve this one - I have not removed the console yet which will be the next job so any suggestions on how to remove the broken stub of the bolt??
Thanks again
 
I may possibly be looking for a right side aluminium console for the car - do any of the breakers on here have one for sale?
I'll know better tomorrow but be good to get an idea of availability?
Thanks
 
I found this video helpful for just the link arm and spindle. Well, not done yet. But really helpful with a few trix.
 
I found this video helpful for just the link arm and spindle. Well, not done yet. But really helpful with a few trix.
Hello.
I would've attempted mine too, if it'd just been the arms. Both sides needed replacing.
I needed the driveshaft boots replacing as well, so left it to a local VW/AUDI specialist garage.
While it was being done I told them to replace the rear bushes too.
I provided all the parts, FAI and Lemforder, except new bolts. I got them to supply genuine boots too.
The garage had a very difficult job removing the rear bushes; 2 man job and heat needed etc.
I reckon I could've done what you did, but due to the extent of work mine needed, I was glad
it went to the garage. I don't like being defeated!
Helpful video though, thanks.
 
Hello.
I would've attempted mine too, if it'd just been the arms. Both sides needed replacing.
I needed the driveshaft boots replacing as well, so left it to a local VW/AUDI specialist garage.
While it was being done I told them to replace the rear bushes too.
I provided all the parts, FAI and Lemforder, except new bolts. I got them to supply genuine boots too.
The garage had a very difficult job removing the rear bushes; 2 man job and heat needed etc.
I reckon I could've done what you did, but due to the extent of work mine needed, I was glad
it went to the garage. I don't like being defeated!
Helpful video though, thanks.
Good afternoon, all.

I expect (hope!) from the posting dates that the original enquiror has long-since completed wishbone replacements. If not, and likely for sharing with those that have experienced pain and grief and with those that may avoid same, I make the following observations having adrressed this task a couple of times on my Tdi 90's.

- The 12 x 100mm console bolts MUST be approached with subjective patience; if these are still factory original, years of salt etc, shall have ingressed particularly from the rear of the console bracket possibly causing the (now corroded) leading few mm of the bolt to "tear" or at least weaken the console thread as it is removed. I absolutely recommend overnight, ,at least, liberal applications and re-applications of injector remover or suchlike freeing agent where there this bolt enters the console bracket (it shall creep in past subframe interface) and at the rear of the bracket.

- For stubborn cases, I recommend setting a torque spanner to "crack" open this bolt (but back off rather than get too "brave" if there's a lot of resistance; remember, its a "stretch" bolt and "manliness" is not the approach here; more time and freeing agent is. Just ask any of those poor souls that have had the bolt snap in the console thread = you shall now have to remove the console bracket, appease your local, friendly, machine shop into coiling it and add to your task additional suspension/ geomerty reconfiguration. Be wary of consoles supplied by breakers yards; do you assume that their bolts have been extracted with TLC?

- Despite the steel/ aluminium bolt/ console bracket interface, I say that liberal applications of copper grease is probably the best and simple corrosion/ future-proofing solution; you shall thank yourself if you (as is likely) shall have to again remove those bolts!

- I presume you obtained the hardward fitting numbers so no need for me to state here. But many of you shall have noticed that the factory OE (very sensibly) bolts had an unthreaded, thus narrower diamer, "lead" on on the bolts. The newer/ currently VAG-supplied ones dont. While the "lead" obviously facilitates "wriggling" the bolt through the subframe/ forward arm bushing into the console bracket (before BY HAND engaging the leading few mm of bolt thread), it presents/ facilitates the problem I earlier mentioned, namely, corrosion of the bare, exposed thread at the rear of the console bracket. You shall realise this when you go to, by the book, torque + 90 degrees the bolt; the "dirty" thread encountered by the "longer" (i.e. fully-threaded) console bolts shall cause resistance and thus an inaccurate surface tension/ torque result (which, as I have experienced, can lead the arm bush to "rock around" the console bolt - with more than entertaining torque steer when hitting the loud pedal in higher gears....!!!). Again, clean the thread, do not up the torque beyoud the spec. or else..............................

- My solution to the last mentioned issue was twofold; (1) To my disappointment, the new Febi cast arms'(and many other makes too) bushing sleeve is 15mm I.D, the bolt = 12mm O.D. This may facilitate workshop fitting and mis-alignment. But it particularly facilitates the "rock around" the bolt as described where the bolt, with a dirty female thread, does not have adequate clamping force. Solution # 1; double-sided serrated washers to tighted the bolt face to the subframe (inceidental effect of my spec washer was to cause the bolt to sit c. 3.5mm further forward of the subframe face and thus minimise the "dirty thread" as described - no issue regarding clamping/ thread length (bearing in mind that the factory OE bolt has even less threaded contact having regard to the unthreaded "lead"). Solution # 2; Fit Powerflex PFF3-1001, Polyurethane bushes ..... Magic! With all new Monroe Reflex, stock springs etc., the vererable old ladies are restored to go-kart handling (joy!); this remains, withing the lawful limitations of public road driving, my favourite car (over those with 4 x the power; but then as we say, power is nothing without control/ handling). Incidentally, I carefully drilled and cut-out the Febi bushings while workin on the ground rather than ramp - bad plan, it took hours, many drill bits and hacksaw blades .... but relief to discover that, yes, these poly-bushes really do fit the cast wishbones!

- As doubtless you have discovered, the trailing arm of the (particularly cast) wishbone typically requires some "machining" (but care in maintaining Hex profile) so that your "manly" rachet straps, with red rubber grease, can persuade the trailing arm (spigot) to enter the (rear) console bracket bushing (which, if not workshop abused, is rarely a replacement item).

- Incidentally, and this is a whole other A2 discussion, I opted for the "older", cast, wishbones/ lower control arms. For anyone who gets fussed about not being able to replace the ball joints, I say that if you're kind to the car quality joints are typically good for 100k+ miles ...... so no discussion when you've inspected the salt-induced rot of the (Tdi 90/ newer) fabricated variety. There are many in our community that can thank MOT for perhaps just-in-time failures.......

Apologies for the "tome" of a contribution and not teaching most of you to suck eggs; all of this and a lot more could be shared during a few minutes in the workshop :cool: .

Best regards.
 
There is a lot of confusion regarding torque to yield bolts. The vast majority of bolts on an A2 are standard 10.9 and 12.9 high tensile. I check them out if if they standard and good I reuse them. I don't understand why the manual specifies replace for every screw? I don't use an angle gauge either when refitting, they are fine something like. My Audi workshop told me this years ago and I have saved a small fortune on fixings.
I'm currently working on the cam and injectors, those screws are torque to yield, they will be replaced and an angle gauge will be used.

Edit, my car is in the air at the moment so I thought I would double check that I'm not talking ballcocks. That is an Audi supplied bolt, the original was solid with aluminium oxide and ripped out the console female thread. Clear as day it is a standard 10.9 not a torque to yield. I would happily reuse that:

IMG_0599.jpg
 
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