M635CSi suspension conversion - problem UPDATED |
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Horsetan
Really Senior Member II Say Neigh to Gatsos Joined: 11-April-2003 Location: Please let it be Ireland Status: Offline Points: 6381 |
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Posted: 24-April-2007 at 22:51 |
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Right fellas, as everyone knows, my Six is having M635CSi suspension installed As of tonight, it looks like the mechanic (a serving BMW technician) has hit a problem. Basically, almost all the M635CSi suspension kit is now installed on my car (a standard '83 635CSi) - springs, dampers, top mounts, bump stops, bushes, pads, etc., plus the 750iL upper control arm bushes. All of that went in OK. BUT: Mechanic reports that the anti-roll bars from the dismantled M635CSi do not fit. Apparently the front one in particular (25mm dia) rubs the subframe. This is the first I've heard of this happening, as no one else who has done this conversion has reported this problem. M6s and standard Sixes (from May 1982) used the same subframe. For the moment, he has put back the original 19mm front/14mm rear and is going to take it for a test run, and will then investigate the parts database to see if anything changed. I'm surprised, though. So what might be causing this? Any ideas? And what might I usefully do to get round the problem? Edited by Horsetan |
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RossM6/635
Groupie Joined: 26-May-2004 Location: Hampshire Status: Offline Points: 63 |
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As far as I can make out you have to change the mounting bracket for the two bolt type as fitted to the M535 E28 chassis. If not the stronger 25mm bar will rip of the 6 series one bolt fitting. This requires welding a new bracket on . Aslo check the mounted on the shocker if you intend to try the 25mm bar. Give me a call if I can be of any futher help. Regards |
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Ross
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Horsetan
Really Senior Member II Say Neigh to Gatsos Joined: 11-April-2003 Location: Please let it be Ireland Status: Offline Points: 6381 |
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Right so, this is what it looks like underneath the M635CSi at the front: The new brackets and bushes I have are the M635CSi ones. Ross, are you saying I should have bought E28 M535i ones instead?
The parts diagram: is unhelpful because it gives the same generic diagram, whether or not you have E24 635CSi or M635CSi, or E28 M535i or M5
I'd do this, but I've mislaid your mobile number Edited by Horsetan |
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Horsetan
Really Senior Member II Say Neigh to Gatsos Joined: 11-April-2003 Location: Please let it be Ireland Status: Offline Points: 6381 |
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In the end, I went back to the standard Six roll bars for the time being.... ...the car's now back, and things are a LOT firmer ; even so, although it sits lower, and it feels like you're driving by the seat of your underpants, it's not that much lower. Meanwhile, this is what happens to suspension that's expected to work for 20 years or more: Edited by Horsetan |
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