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Thread: Front suspension top wishbone bolt info

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  1. Front suspension top wishbone bolt info 
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    My son replacing my front shocks and springs.
    He has sheared the top wishbone bolt clamping the ball joints.
    Is this a standard bolt and what size as I have odd bits in my garage.

    thanks
    2008 A3 Quattro 2.0 TDi 170 bhp
    2009 A6 c6 Avant 2.7tdi LeMans
     
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  2. Re: Front suspension top wishbone bolt info 
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    On a 98>04 4B the bolt is M10x100x1.5 10.9 tensile. There is a special tool for getting the bolts out but it is ****, the best way is to heat the upper cast iron neck around the ball joints until the bolt can be hammered out BUT that does destroy the ball joints although new upper arms are cheap. If it had the later aluminium uprights as on your 4F, these are a sketch as heating the ally can make it crack and you can be into 1k of parts per side to put it right.







    Drift stages



    if the new dampers have fixed lower spring plates, the damper pre instal alignment is vital



    the 8E type with alloy uprights was one thing



    but later on the 8K type they turned the bolt around and made it impossible and there are no tools to help BUT thankfully they turned the inner mounts bolts around giving you a way out of cracking the alloy

    Last edited by Crasher; 23-05-2020 at 10:07 PM.
    "I disapprove of what you say, but I will defend to the death your right to say it"

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  3. Re: Front suspension top wishbone bolt info 
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    Thanks
    It looks like I may have to renew the upright. Despite heating with a plumbers gas gun and WD40, with a 4lb flogger against the ball joint area and using a 2lb hammer to hit the bolt out.
    It just wont budge.
    2008 A3 Quattro 2.0 TDi 170 bhp
    2009 A6 c6 Avant 2.7tdi LeMans
     
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  4. Re: Front suspension top wishbone bolt info 
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    Normal, it is the cast iron upright so get some proper heat in there, I now use a 2Kw induction heater instead of the old gasaxe.
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (1868-1956)
     
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  5. Re: Front suspension top wishbone bolt info 
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    This may help you, a friend with the same problem brought the upright round to me to see if we could together get it removed.

    Up to that point it'd been heated, partly drilled out, and had a hardened punch snapped off down inside the hole!!!

    It wouldn't move at all with hammering, absolutely solid like it was part of the structure.

    We'd all but given up, but tried it with a SDS hammer drill with rotary stop (just hammering) using an old drill shank with tungsten tip removed and ground flat, just positioned it on a block of hardwood and rattled it continuously. After about ten minutes (mostly deaf at this point as it makes a helluva racket) it started to show signs of movement, dust and corrosion coming out of joint etc. Once past that it freed up and withdrew.

    We didn't think we were going to get it, but that hammering is so insistent, saves you clobbering your knuckles with a lump hammer too, a good attribute
     
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  6. Re: Front suspension top wishbone bolt info 
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    We use an air chisel with a pointed drift to do the same thing.
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (1868-1956)
     
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