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Date: Thu, 06 Oct 2005 23:19:54 +0100
From: "Charles C." <>
Subject: Re: bottom shock mount on C900 a-arms

Craig's Saab C900 Site wrote: > Dave Hinz <> writes: > > >>On Wed, 05 Oct 2005 20:50:42 -0600, Charles <> wrote: > > >>>If you can get it off, maybe with some WD-40 or whatever penetrating >>>stuff they might sell in the UK, get a tap and die the right size and >>>clean up the threads before putting it back together. > > >>WD-40 isn't a penetrating oil. It pretends to be, but for anything >>other than _W_ater _D_isplacement, it's a lousy compromise. > > >>Craig, someone must have a lower a-arm. If the threads are stripped, >>for a shock, I'd rather replace the a-arm than to improvise. > > > Yeah I know they're easy to get since there are a few European wreckers here > in Sydney so there will be some C900's around waiting to be stripped. > Getting new bushes is trivial. I'm surprised that the thread for the shock > mount has appeared to have stripped so easily - I set my torque wrench to > the right setting (around 60 ft/lb WHAAAAAAAAT? Screams in astonishment. That thread is about a 10mm thread (less?). There is no way you tighten a nut on 10mm thread to anything more than 20 ft/lb (add that I have no theoretical engineering background). What is the size of the nut, circa 13mm? 60(ish)feet pounds are for roadwheel nuts. You first have to get it off and then clean the threads and see the damage. From memory the nut only held the shocker in its natural resting place. It is not used to hold the A arm in place. A self locking nut (+ washer or whatever similar) should only need hand tight pressure. Torque setting is not given for that nut in the Haynes manual!!! Could you be looking at some different torque settings? if I remember what I read in the Bentley > book two days ago), and it would have got to about 40. The nut can't be > removed with finger pressure and a spanner will turn it but it needs a fair > degree of force. It's just not moving anywhere, though I guess there is some > bush lube, etc. gunked into the thread otherwise I should have been able to > see little bits of metal around the outer side of the nut where the thread > of the 'bolt' on the a-arm comes out. hmmm > > I'm hoping that the a-arm doesn't have to be replaced and just for a dudded > thread it's a bit radical but since the lower shock mount is fairly > important (!), that pushes it up the priority scale. Take it off first and come back. I wonder, for internal threads there is an insert that can be used to rethread them. Would there be a similar sleeve to in effect rethread the bit in question. Rethreading (in effect) a bold will weaken it as it will be made thiner. > > Craig. > > PS. Photo's are still on the camera. 8-) Hope it helps. Charles -- Please remove _removeme_ to reply.

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