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Steering rack maintenance

Discussion in '308/328' started by Portofino, Mar 25, 2020.

  1. Portofino

    Portofino Karting

    Sep 17, 2011
    190
    Yorkshire UK / Switzerland/ Cote d Azur
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    Portofino
  2. thorn

    thorn Formula 3
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    Aug 7, 2012
    2,374
    Tallahassee, FL
    The top image: basically, adjustment shims.

    Lower image: can't tell what exactly this is a photo of. Is that the evaporator drain tube?
     
  3. thorn

    thorn Formula 3
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    Aug 7, 2012
    2,374
    Tallahassee, FL
  4. Portofino

    Portofino Karting

    Sep 17, 2011
    190
    Yorkshire UK / Switzerland/ Cote d Azur
    Full Name:
    Portofino
    Yes ,the AC drain tube .The other thing Is a mounting bracket .
     
  5. Cirorsi

    Cirorsi Formula Junior
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    Steven
    Thor, how do you like that fast rack?
     
  6. chris_columbia

    chris_columbia Formula Junior
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    Feb 5, 2008
    577
    Columbia MD
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    If you are in there, you might consider replacing the 8 bushings that mount the rack to the frame with something stiffer. Do a search. A few of us have switched to acetal.
     
  7. jha328

    jha328 Rookie

    May 26, 2013
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    Australia
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    John
  8. thorn

    thorn Formula 3
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    Aug 7, 2012
    2,374
    Tallahassee, FL
    I do like it, but I've never driven a 308 without one. (So, cannot objectively say how much/if I prefer it.)
     
  9. Portofino

    Portofino Karting

    Sep 17, 2011
    190
    Yorkshire UK / Switzerland/ Cote d Azur
    Full Name:
    Portofino
    Thanks very much guys , that’s very helpful
     
  10. Nino1964

    Nino1964 Karting

    Aug 14, 2015
    168
    North Georgia
    The shims can be purchased from Superformance. Not sure of the exact procedure for proper shimming procedure. Maybe someone can advise?
     
  11. TonyL

    TonyL F1 Rookie
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  12. yelcab

    yelcab F1 Veteran
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    Nov 29, 2001
    9,629
    San Carlos, CA
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    Mitchell Le
    These racks are install and forget items. There are no regular maintenance other than …

    1) If the boots crack, replace them.
    2) If there is a leak, rebuild the rack.
    3) If there are binding issues, replace the rack.

    The changing of the shims is done at the time or rebuild or at the factory. You really don't need to or should even mess with it.
     
    Crowndog and Rifledriver like this.
  13. GordonC

    GordonC F1 Rookie
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    Aug 28, 2005
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    Calgary, AB, Canada
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    Gordon
    Disassembly and reassembly/rebuilding the rack is also necessary if you want to install the fast ratio rack/pinion internals from Superformance. I don't believe anybody sells a fast ratio assembled rack?
     
  14. yelcab

    yelcab F1 Veteran
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    Nov 29, 2001
    9,629
    San Carlos, CA
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    Mitchell Le
    That would be true, but that is not regular maintenance. You are essentially building a different rack. The shims affect the effort it takes to turn the steering knob. There is probably a spec, or adjust by feel for someone who has done a hundred of these.
     
  15. thorn

    thorn Formula 3
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    Aug 7, 2012
    2,374
    Tallahassee, FL
    I'd done shim adjustments on mine. Perhaps I shouldn't, but I've gone from a car that was incredibly difficult to turn to one that's completely manageable. Preload, in my opinion, was set far too high.

    (I'll note for the record that the original install of my rack was completely, utterly screwed up by another mechanic.)
     
  16. Nino1964

    Nino1964 Karting

    Aug 14, 2015
    168
    North Georgia
    I set the shims as part of the rebuild. Shim height that is shallow in very tight rack.
     

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