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Removing Front Strut Assembly

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  • Removing Front Strut Assembly

    I'll leave this one open a while to collect anyone else's tips and suggestions but there shouldn't be much more to say... Except I'll add some photos here and get it added to S2central when I get some time.

    Assumption - this explains how to remove just the front strut assembly leaving everything else in place.

    Warning - Doing this will upset the camber settings of your suspension. Unless you plan getting it aligned after replacement it is wise to use some spots of paint where the big bolts attach the strut to the hub carrier so that you maintain the position.

    Tip - All the suspension nuts referred to below are 'nyloc' types. Best practise is to renew any of these types of nuts when they have been removed. Thats not always practical of course. Edit - The large strut bolts at the hub carrier are a stretch type that must also be renewed. I'll add a list of parts later.

    1 - Loosen roadwheell bolts, Jack the car up, Remove the wheel and secure car safely onto an axle stand before going any further.

    2 - There are two large bolts which attach the strut to the hub carrier. One of them should have a plastic cover with an integral strain relief for the ABS wiring. Its quite tight and brittle so tease off the cover gently to expose the bolt. Give those big bolts a good spray of your favourite penetrating oil as they can put up some resistance ! I've seen 22, 23 and 24mm nuts and bolts used here on various S2's. Loosen them right off but leave the bolts in place for now.

    3 - There is a metal bracket attached to the strut which carries the brake line connections and another clip for the ABS wiring. This is connected to the strut body by two 10mm bolts. Remove those and separate the bracket to avoid opening brake lines. My experience is these 10mm bolts get very rusty. Don't be too surprised if one or more breaks off... In which case drill them out when you get the strut on the bench and use a suitably chunking self-tap screw as a replacement.

    4 - Next to remove is the link rod from the rear of strut to the anti-roll bar. These get really crusted up so may also need a good soaking first. Use a 17mm spanner to prevent the joint from turning whilst another 17mm spanner (or socket) works on the lock nut.

    5 - Now the track-rod end needs to be removed from the front of the strut assembly. A 17mm nut is the usual size there. If you are lucky, the joint will remain tight in the strut while you remove the nut. If not then you need to get creative with clamps etc. Use a balljoint separator - preferably not the impact type unless you must - to get the joint out of the strut.

    6 - At this point, the only thing holding the strut onto the car is the top mounting... Open the bonnet and remove the two 10mm plastic nuts that secure the strut cap. Then you can see the top mount.

    7 - A couple of special tools are called up in the OFRM for the next stage - VAG3078 being the important one. Its nothing more than a deep 22mm socket that is cutaway so that access with a 7mm allen key is permitted to hold the damper steady while removing the 22mm nut. If you don't have such a socket, some lambda probe tools will work, or failing that you can use a 22mm 'swan neck' spanner. Only trouble with the swan-neck is on refitting as you can't measure torque on the nut but needs must sometimes.

    8 - So remove the top mounting nut completely. The strut should now just be resting in the hub carrier held in place by the two bottom bolts that were loosened in Step 2. Slide those bolts out and the strut simply lifts away.

    Refitting is a reversal of removal. I'll post up torque settings and part numbers soon.

    Only warning about refitting is to use NEW nylocs wherever possible and be sure to notice that the track-rod end has a fine threaded nyloc which is NOT the same as the nylocs on the link rods.

    Paul
    Paul Nugent
    Webmaster http://S2central.net
    Administrator http://S2forum.com

    1994 S2 Coupe ABY - aka Project Lazarus
    2001 A6 allroad 2.5TDi - family tank
    2003 S4 Avant 4.2 V8 - daily burble

    Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

    There are only 10 kinds of people that understand binary - those that do, and those that don't

  • #2
    In no particular order:-
    • Make sure you replace the strut to hub bolts as they are stretch bolts and are done up to 110Nm + 90 degrees. Or the hub bolts as these are 200Nm + 180 deg!
    • The front wishbone to subframe bolts are also stretch bolts.
    • RS2 hard lines are a pain as they make it difficult to put the calliper anywhere.
    • Don't forget to disconnect the ABS sesnors!
    • A ball joint splitter is essential and getting the steering arm to tighten can be a pain. Be careful not to damage the rubber boots or it's new ball joint time!
    • A diseasel injector socket can be used for the top strut nut.
    • New VAG track rod ends use fine pitch threads so the nuts off the older, larger style ones will not fit.


    Everything else is pretty simple.
    Cheers'en, AndyC
    1994 ABY Coupe - Projekt Alpinweiss

    Comment


    • #3
      Good point about the stretch bolts - they shouldn't be re-used really.

      You've gone a step or two ahead of me there though talking about wishbones and ABS sensors which attach to the hub carriers... I am gonna have a seperate how-to for them.

      This how-to explains just getting the upper part of strut assembly out - leaving all the other gubbins in place - say to replace springs, dampers or top mounts.

      Paul
      Paul Nugent
      Webmaster http://S2central.net
      Administrator http://S2forum.com

      1994 S2 Coupe ABY - aka Project Lazarus
      2001 A6 allroad 2.5TDi - family tank
      2003 S4 Avant 4.2 V8 - daily burble

      Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

      There are only 10 kinds of people that understand binary - those that do, and those that don't

      Comment


      • #4
        full instructions already on the web

        http://s2-audi.co.uk/tech_articles/front_shocks.htm

        Audi workshop manual is quite specific that the hub and strut should not be seperated if being removed for replacement of springs or dampers.
        Mike

        http://www.s2-audi.co.uk

        Comment


        • #5
          Excellent write up Mike
          93 S2 Avant Parting
          91 URQ RR
          02 A4 tdi Avant

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