Announcement

Collapse
No announcement yet.

My E46 underside resto

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    My E46 underside resto

    I figured fellow E46 fans may enjoy this. This work was carried out over winter.

    With the car off the road for the year, I took it to JWS Motorworks for them to install a Redish RACP plate kit & supplied them with new replacements of anything they'd be taking off to carry out the job, and a few other bits - job quickly turned into an underside restoration from the mid of the car backwards - albeit with the effort going towards functional replacements & rust/future proofing, rather than a full blown anal nut & bolt approach.

    The work carried out included:
    • RACP reinforcement using the Redish plate kit on the underside and interior bracing.
    • Clean up, removal and treatment of any existing corrosion
    • Removal of the factory floorpan grommets & battery bracket (known starting point for corrosion)
    • Continuously welding the factory spot welded lower arch seam
    • New rear springs (existing ones were flaking)
    • Exhaust hangers, brackets, mounting plates, gaskets & hardware replaced
    • A pair of new driveshafts
    • Subframe, brace, knuckles, arms and all other major components blasted and powdercoated
    • New bushes (Lemforder for the control arms, RTABs, droplinks etc, Powerflex for the subframe & ARB).
    • Rear calipers painted & new flexis
    • New genuine steel brake lines front to rear
    • Wheel bearings, handbrake assembly & backing plates replaced
    • All brackets, nuts, bolts, hardware etc replaced with new
    • Underside painted/seam sealed & undersealed
    • Alignment & MOT

    Essentially an underside restoration, albeit with the diff left for later on.

    I had already rebuilt the prob, CSB, gearbox mounts etc prior to this.

    Note the final finish isn't half as yellow as the photos make out.


    Click image for larger version  Name:	PIC0008410.jpg Views:	0 Size:	155.3 KB ID:	356029

    Click image for larger version  Name:	FB_IMG_1761072497569.jpg Views:	0 Size:	151.7 KB ID:	356027

    Click image for larger version  Name:	PIC0008613.jpg Views:	0 Size:	104.1 KB ID:	356030

    Click image for larger version  Name:	PIC0008614.jpg Views:	0 Size:	91.6 KB ID:	356032

    Click image for larger version  Name:	PIC0008634.jpg Views:	0 Size:	93.7 KB ID:	356033

    Click image for larger version  Name:	PIC0008654.jpg Views:	0 Size:	93.9 KB ID:	356035

    Click image for larger version  Name:	PIC0008791.jpg Views:	0 Size:	103.0 KB ID:	356036

    Click image for larger version  Name:	PIC0008883.jpg Views:	0 Size:	99.6 KB ID:	356034

    Click image for larger version  Name:	PIC0008841.jpg Views:	0 Size:	183.7 KB ID:	356037

    Click image for larger version  Name:	FB_IMG_1761072483908.jpg Views:	0 Size:	99.3 KB ID:	356028

    Click image for larger version  Name:	PIC0008885.jpg Views:	48 Size:	93.5 KB ID:	356031


    Then I got around to sorting the front end out. Cleaning the knuckles up, new struts, springs, wheel bearings & an F30 BBK:

    Click image for larger version  Name:	IMG_20251111_175905.jpg Views:	0 Size:	170.2 KB ID:	356038

    Click image for larger version  Name:	IMG_20260223_152303.jpg Views:	0 Size:	170.5 KB ID:	356042

    Then a wheel refurb:

    Click image for larger version  Name:	IMG_20260305_141752.jpg Views:	0 Size:	160.3 KB ID:	356044

    And the car was back on the road...

    Click image for larger version  Name:	IMG_20260320_115737.jpg Views:	0 Size:	151.2 KB ID:	356040

    Click image for larger version  Name:	IMG_20260320_115751.jpg Views:	0 Size:	134.3 KB ID:	356039

    Click image for larger version  Name:	IMG_20260320_115808.jpg Views:	0 Size:	123.6 KB ID:	356043

    Click image for larger version  Name:	IMG_20260320_115759.jpg Views:	48 Size:	117.6 KB ID:	356041

    ​The diff is still outstanding as I'm unsure whether to go for a simple rebuild/bearing change, or opt for a ratio change.

    Notable stuff carried out prior to this:

    - front end refresh (wishbones, FCABs, strut bearings, bump stops, tie rods, ARBs)
    - VANOS rebuild (Redish Motorsports, Beisan kit)
    - Rod bearings (Redish Motorsports, custom mixed ACL set)
    Last edited by PF02XLZ; 05-25-2026, 12:45 PM.

    #2
    Very nice! Where did you source the front L.H spindle? I can't find these, only CSL spindles seem to be available.
    2004 Silbergrau Metallic 6MT
    Karbonius/OEM Snorkel/Flap/HTE Tuned
    Ssv1/Catted Sec. 1/SS 2.5" Sec. 2/SCZA

    OE CSL Bootlid/AS SSK/TCK Vorshlag/4.10 Gears/ Sportline 8S Wheels/Cobra Nogaros
    RACP Plates/Vincebar/CMP/Turner RTAB/Beisan

    2006 M6 Black Saphire SMG
    Instagram

    Comment


      #3
      Originally posted by Cubieman View Post
      Very nice! Where did you source the front L.H spindle? I can't find these, only CSL spindles seem to be available.

      They are original to the car, just needle scaled & painted.

      Click image for larger version

Name:	IMG_20251104_155926.jpg
Views:	120
Size:	164.4 KB
ID:	356064

      Click image for larger version

Name:	IMG_20251104_164500.jpg
Views:	119
Size:	147.6 KB
ID:	356063

      Dread to think how much new ones are, CSL or not!

      Comment


        #4
        Nice!

        Comment


          #5
          This is great work, very nicely done!
          RIP M3F
          2002 M3 - 2002 325iT - 1994 Bronco

          Comment


            #6
            Nice! Always funny how so much work can be wrapped up in a few pics and sentences. Car looks great.

            Comment


              #7
              Originally posted by Keith_MN View Post
              Nice! Always funny how so much work can be wrapped up in a few pics and sentences. Car looks great.
              Well said.
              2005 ///M3 SMG Coupe Silbergrau Metallic/CSL bucket seats/CSL airbox/CSL console/6 point RACP brace/Apex ARC-8s
              Build Thread | Community Patch | MSS54 DS2 Tool

              Comment


                #8
                Nice work!

                Comment


                  #9
                  Originally posted by Keith_MN View Post
                  Nice! Always funny how so much work can be wrapped up in a few pics and sentences. Car looks great.
                  And then you ask yourself, I spent how much? lol

                  Comment


                    #10
                    Did you replace the little hardware underneath the car? I am setting out on a similar project, I'd love to find some counts on hardware before starting haha, if not maybe I'll be the one to figure it out
                    2003 E46 M3 - Alpine on Imola Build Thread

                    Comment


                      #11
                      Originally posted by Rokoz View Post
                      Did you replace the little hardware underneath the car? I am setting out on a similar project, I'd love to find some counts on hardware before starting haha, if not maybe I'll be the one to figure it out
                      Mostly, yes - I had a 100-something line order from the dealers consisting of purely hardware/fixings, mainly brake/fuel line retaining clips, anti rattle hardware, body panel clips, and the usual nuts & bolts etc. It was just shy of £1000, and came in a bag small enough you could hold it in one hand!

                      Took a good few hours trawling realoem to put it together. Ultimately had to draw the line somewhere, as it isn't a concourse resto, so anything M8+ was wire brushed and re-used, with the exception being any of the rear arm hardware, since I didn't want any of those seizing in the future and making adjustments or bush replacements difficult.

                      Oh, and lots of penny washers since I didn't want to replace the heatshields given most mounting points were still healthy.
                      Last edited by PF02XLZ; 05-25-2026, 12:41 PM.

                      Comment


                        #12
                        Originally posted by bigjae46 View Post

                        And then you ask yourself, I spent how much? lol
                        £7000/$9500 for the rear end/RACP/underside - a near perfect 50/50 split between parts and labour.

                        Comment


                          #13
                          I want to do something similar to this as well. I'm wondering what a full underside resto would be at JWS or Redish.

                          Comment


                            #14
                            Originally posted by eXpensiveGears View Post
                            I want to do something similar to this as well. I'm wondering what a full underside resto would be at JWS or Redish.
                            Redish quote an average of 150-200 hours & £10k+ in parts for a full concourse job, so £30k+. Easily outstrips the value of 99% of M3s.
                            Last edited by PF02XLZ; 05-26-2026, 08:56 AM.

                            Comment


                              #15
                              Originally posted by PF02XLZ View Post

                              Redish quote an average of 150-200 hours & £10k+ in parts for a full concourse job, so £30k+. Easily outstrips the value of 99% of M3s.
                              Wow, yeah that's definitely a lot.

                              Comment

                              Working...
                              X