Changing Steering Rack, what else to do?

Discussion in 'E36 M3 (1991-1999) and E30 M3 (1986-1990)' started by MattDear, Apr 14, 2019.

  1. 14 Apr 2019 at 7:50 AM #1
    MattDear

    MattDear A mere Chipper

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    I’ve got a purple tag rack to fit, just wondering what else is worth doing at the same time?

    Already got new E46 inners and E36 outers, but is anything else worth doing? Seals on the fluid lines, the small rubber bush etc?
     
  2. 14 Apr 2019 at 9:42 PM #2
    NZM3AN

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    Change out the reservoir, it has a filter in it that you can't replace separately. Change the low pressure feed line, use a worm drive clamp at the reservoir and new crush washers at the pump (two for each fitting!). Decouple the return hose from the cooler (cut it off) and replace the hose with any same internal diameter (10mm) AT hose, don't make it too long. Re-affix return line to the cooler using a normal worm drive clamp. If your return line has a restrictor transfer it over to the new hose and clamp it in place, connect to reservoir with another worm drive. New crush washers at the rack for the high pressure line and cooler. Don't replace the high pressure line unless it's obviously damaged (it's really expensive!). Clean and reuse all your banjo bolts unless you're anal about things like that.

    Edit: then alignment and enjoy the difference!

    Edit 2: elaborated for clarity.
     
    Last edited: Apr 15, 2019 at 9:20 AM
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  3. 15 Apr 2019 at 9:53 AM #3
    Jockey

    Jockey A mere Chipper

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    Just my 2 cents worth if helps

    I managed to get a Hose specialist in Colchester to rebuild my existing high pressure hose with new fittings and worked a treat £15. Theres a small plastic clip holds high pressure hose in place midway along the pipe which is worth renewing or making sure it there and used in my opinion or the hose just hangs across.

    All the rest is rather cheap and no brainer to replace... reservior , return pipes etc as stated above.

    My only gripe was I could not get hold of an original pump replacement and no one is essex would rebuild my unit :-( same goes for the secondary air pump - cant buy new and no one would rebuild :-(

    Good luck should be easy and best change i ever made to car - steering much better feel - my rack was from a Z3 1.9

    Cheers

    John
     
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  4. 16 Apr 2019 at 1:31 AM #4
    e30h26

    e30h26 A mere Chipper

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    Change the rubber Steering Coupler bush for a solid one, made the world of difference to steering feel for me.
     
  5. 16 Apr 2019 at 5:29 PM #5
    MattDear

    MattDear A mere Chipper

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    Thanks for all the info, hate to be that guy but any help with part numbers for what you're referencing? Guessing it all comes from BMW?

    I had a search but couldn't find much. Unsure if I'd want a solid one? But only Poly one I could find stated no RHD.
     
  6. 16 Apr 2019 at 10:26 PM #6
    NZM3AN

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    It's all BMW (or OEM) except the return hose (any 10mm ID AT hose, it's low pressure) and worm drive clamps (typically 12mm - 16mm or thereabouts, use stainless steel clamps).

    Have a look at realoem (under "Radiator") and once you've got your head around the basic principles let us know if you have any questions. I don't think all the crush washers are listed on the M3 pages, let me know if you have a gap there, I've got the numbers written down somewhere.

    I look for prices on schmiedmann.com and fcpeuro.com - remember that many LHD and RHD steering components are different.
     
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  7. 16 Apr 2019 at 11:37 PM #7
    e30h26

    e30h26 A mere Chipper

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    I've fitted solid ones to every road car I've ever owned and it's been one of the best modifications I've done. My E90 doesn't even have a rubber bush in the steering coupler from the factory. It's basically just a solid alloy disc so it shouldn't be LHD or RHD specific.
     

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