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How To: Coilovers and strut tube modification (with pictures!)

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    #16
    Just start browsing some of the circle track shops, AFCO makes some sleeves that work as well as the adjusters. I'd heard that before so I just starting searching for coilover hardware and found 3 or 4 companies that sold stuff that would work. None have the sleeves in the right length so I just purchased a 7" long one and cut it in half and it fit perfectly.
    85 325e 2.7 ITB'd stroker

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      #17
      wow, looks like a small bit of work there. i didnt do any cutting of my struts to install my GC...but then, i will probably end up bottoming out alot...
      IG: @Baye30

      FRONT VALENCE IS ZENDER!!! STOP FILLING MY PM BOX PPL!!!

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        #18
        Originally posted by E30_pilot

        BTW Sean TIG isn't for steel welding.;)
        wrong

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          #19
          Originally posted by E30_pilot

          BTW Sean TIG isn't for steel welding.;)
          [sarcasm] yeah, and mig isn't for aluminium... [/sarcasm]

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            #20
            Originally posted by mspiegle
            I MIG'd that. Thanks for the compliment :D
            They are very nice welds! :D



            I think I might have confused the two. I thought TIG was MIG - I MIG welded, and that is definately easy. TIG is the harder stuff.
            - Sean Hayes

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              #21
              MIG is actually a newer technology than TIG. MIG is faster and cheaper, but it isn't as pretty looking. Both TIG and MIG can welding steel, aluminum, stainless, and magnesium. TIG can also weld dissimilar metals.
              Michael Spiegle

              '01 Ford Escape / Daily Driver
              '99 M3 / Track Car
              '87 325is bronzit / wtf car
              '06 Daytona Triumph 675 / Daily Rider

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                #22
                Here's a picture of the final product. I managed to get both assemblies to within 1mm of each other... not bad for all freehand work.

                Michael Spiegle

                '01 Ford Escape / Daily Driver
                '99 M3 / Track Car
                '87 325is bronzit / wtf car
                '06 Daytona Triumph 675 / Daily Rider

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                  #23
                  A few more pics:





                  Michael Spiegle

                  '01 Ford Escape / Daily Driver
                  '99 M3 / Track Car
                  '87 325is bronzit / wtf car
                  '06 Daytona Triumph 675 / Daily Rider

                  Comment


                    #24
                    how do you hold the threads that the adjusters screw up and down on from turning on the strut housing? or are you not woried about this / hoping friction will take care of it? since you have probably been driving on it for some time by now, have you had problems with the coilovers adjusting them selves?

                    - Jason

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                      #25
                      ^ The threaded sleeve always just rests on the lower lip without being bolted or welded on .

                      Even if you buy a nice set of $2500 Ground Controls this is the way it is .
                      The lower adjustable perch has recessed allen screws that tighten it to the threaded sleeve so there is no way that the threaded part will spin around .

                      E30 M3 / E30 325is / E34 525iT / E34 535i

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                        #26
                        Originally posted by Teaguer View Post
                        ^ The threaded sleeve always just rests on the lower lip without being bolted or welded on .

                        Even if you buy a nice set of $2500 Ground Controls this is the way it is .
                        The lower adjustable perch has recessed allen screws that tighten it to the threaded sleeve so there is no way that the threaded part will spin around .
                        I welded my sleeves on strut.

                        My assembly has separate "locking plate" beneath the adjuster, after finding proper position I just tighten the locking plate against the adjuster.
                        Current:

                        BMW 320i 2d 2.0 m20 -88
                        BMW 325i Cabriolet 2.5 m50 -88
                        BMW 316i touring 1.6 m40 -90
                        BMW 320i 4d 2,2 m54 -01

                        Comment


                          #27
                          Originally posted by Teaguer View Post
                          ^ The threaded sleeve always just rests on the lower lip without being bolted or welded on .

                          Even if you buy a nice set of $2500 Ground Controls this is the way it is .
                          The lower adjustable perch has recessed allen screws that tighten it to the threaded sleeve so there is no way that the threaded part will spin around .

                          When I built mine I cut them perfect so that the gland nut holds them down when tighting.

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                            #28
                            Originally posted by trent View Post
                            When I built mine I cut them perfect so that the gland nut holds them down when tighting.
                            Yeah my Ground Control housings are buil in this maner also .
                            Basically the threaded part is loose but the insert nut holds it down .

                            E30 M3 / E30 325is / E34 525iT / E34 535i

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                              #29
                              [newb flame suit /on]

                              If I get a ground control setup...I need to chop/weld my strut housings?

                              [newb flame suit /off]
                              '89 "is" = M technic II build mode.

                              sigpic

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                                #30
                                Originally posted by trent View Post
                                When I built mine I cut them perfect so that the gland nut holds them down when tighting.
                                I use Bilstein sports and their nut is too small to hold the sleeve.
                                Current:

                                BMW 320i 2d 2.0 m20 -88
                                BMW 325i Cabriolet 2.5 m50 -88
                                BMW 316i touring 1.6 m40 -90
                                BMW 320i 4d 2,2 m54 -01

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