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brake calipers - brain fart 900 1993

posted by  ronald on  Sat Nov 20 15:32 CST 2010
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last visit: Wed Oct 10 11:04 CST 2012
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OK, I'm tired or having a middle aged moment - what size Torx do I need to remove the calipers on my 93 940? I'm changing rotors, so I can't just swing the calipers out of the way. I know I've done this before but I can't seem to find a big enough Torx in my toolbox. Did I use the wrong tool last time and just get lucky? Maybe I've never removed the whole caliper before since I've only had this car a year. Who knows. Anyway, I would appreciate knowing what you use so I can hunt it down or go buy it.

Ron

93 245
93 944








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    brake calipers - brain fart 900 1993

    uid 34776's pic
    posted by  Ryan_R on  Mon Nov 22 08:29 CST 2010
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    last visit: Tue Sep 24 13:46 CST 2013
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    10mm Hex socket will do the trick. I bought a set of Craftsman in 3/8" drive for like $20. Real handy. Put them on a breaker bar so you can lay into it! :-)

    I think the ABS sensors take the 5mm.

    -Ryan







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    brake calipers - brain fart 900 1993

    posted by  david hunter on  Sat Nov 20 16:35 CST 2010
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    It's not a torx. Get out your metric allens
    --
    David Hunter








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      brake calipers - brain fart 900 1993

      posted by  ronald on  Sun Nov 21 04:49 CST 2010
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      last visit: Wed Oct 10 11:04 CST 2012
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      It looks like I'm in the market for a new tool - my allen wrench won't budge either of those bolts. I think I need an allen head with a 1/2" drive socket end.

      Thanks for the quick posts, all.

      Ron








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        brake calipers - brain fart 900 1993

        posted by  spook on  Sun Nov 21 10:04 CST 2010
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        last visit: Fri Oct 24 08:06 CST 2014
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        Dear ronald,

        Hope you're well. The caliper bolts are 10mm Hex Head, as I thought. I'd suggest saturating them with PB-Blaster, on each of several days before you try to remove them. PB blaster penetrates micro-channels in the corrosion, and weakens the corrosion "bond". Gentle tapping, with a hand-held hammer, might help.

        Hope this helps.

        Yours faithfully,

        Spook








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          brake calipers - brain fart 900 1993

          posted by  ronald on  Sun Nov 21 15:28 CST 2010
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          last visit: Wed Oct 10 11:04 CST 2012
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          Thanks for the advice. I am wondering if an allen key has too much flex to loosen a really stuck bolt. I'm going to get myself a hex socket and use my breaker bar as the bolts seem to be really in there. I am applying a penetrating oil at intervals though.

          Ron








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            brake calipers - brain fart 900 1993

            uid 15548's pic
            posted by  volvo245gti on  Sun Nov 21 16:17 CST 2010
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            last visit: Sat Sep 13 16:32 CST 2014
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            While I haven't done this for the 7/9 caliper bolt yet, I did do it for the B20/m41 transmission. I took an allen key and inserted it in the bolt head and marked the depth. I then took that same allen key and stuck it in a 1/2" drive socket and measured the depth. I added both and cut the key at that length. I now have an "insert" that I can use a wrench or socket on. While it may not be as strong as a 1/2" drive purpose built hex key, I haven't managed to break it yet. I have a 3/8" drive 10mm hex head that works fine on the brake calipers...
            --
            Dale








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    brake calipers - brain fart 900 1993

    posted by  spook on  Sat Nov 20 15:43 CST 2010
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    last visit: Fri Oct 24 08:06 CST 2014
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    Dear ronald,

    Hope you're well. I respond now, in the event that time is of the essence. I think a 10mm hex key removes the caliper. I don't recall using any Torx bit on the brakes.

    I'll need to pull the front driver's side (USA/CAN models) caliper on a '93 940 tomorrow a.m. I'll report the tools required, if different than I've stated.

    Hope this helps.

    Yours faithfully,

    Spook







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