Subject: You're welcome Author: erwin : member since November, 2007 : 880 posts Posted on: 2008-03-26 01:30:14

I have a 750, so its the 33321135808 bushings. I'm going back with OEM replacements.

A couple of interesting/weird points:
1) I got 2 bushings from Bavarian Autosport and 2 from www.BMWAutoPartsDealer.com as an experiment to see if there would be a difference (Autohaus doesn't list these). As far as I could tell, all 4 bushings were identical. Except, on 2 of them, someone had ground off the BMW roundel and part number off the rubber boot. Problem is, I didn't notice that until after I had thrown away the packaging, so I don't know which ones they were. On one of them, I could see the top of the eights in "808" where they weren't ground off, so I know they are the right ones. Why would anyone go through the trouble of hiding the part number and logo?

2) The shop manual says "the longer end of the bushing points towards the center of the car", but the ends of these bushings were all the same length. I checked, and the overall length is the same as the old ones. The old bushings did have one end stick out more. But, the center pin easily moves back and forth, so it would seem it doesn't matter much if one end sticks out more or not, it's the dog bones that determine where the trailing arm is located. I decided the new bushings are just an updated design.

One more thing: there wasn't much grease in the new bushings, so I added a bit of synthetic wheel bearing grease inside the boots. I took the center pin out to do this, and noticed the inside diameter of the sleeve has a pattern of "dots" or bumps spiraling down the bore. These seem to be the actual surface the center pin rides against. Maybe it's impregnated grease? The old busings didn't have these. Did they wear away, or is this a new design? With the old bushings, I could rock the center pin back and forth by hand - there was some clearance between the center pin and the inner sleeve. With the new bushings - no such movement.

Anyone have any thoughts/experience with any of this?

Erwin 89 750iL Lowered (a little)

Engine Wolf chips 19 lb, 4-hole (Design 3) fuel injectors PowerFlow Intake Air Filters Royal Purple 20W-50 In process: Custom Cold Air Boxes Interior Phone removed, replaced with cut-to-length dash wood trim on hinge E38 Shifter Knob, Console Plate, and Boot M-Tech 2 M-technic Steering Wheel - air bag deleted E38 Self-Dimming Mirror Audio BMW Business CD Player "CD43" Head Unit Refurbished factory amp w/equalizer Bass blockers (300hz/4ohm) on stock front kick panel speakers Rear deck speakers: Alpine SPS-13C2 5.25" 2 way 175 Watt with bass blockers Subwoofers: 2 JBL GTO804 8" 4-ohm subs Subwoofer install: custom sealed enclosure mounted behind ski bag opening Subwoofer amp: Alpine MRP-M450 400w MONO CD changer relocated to driver's door bottom pocket actuated by bio- mechanical arm controlled by semi-intelligent nut behind the wheel Suspension H&R Lowering Springs (1/2 coil removed from fronts) Koni adjustable front shocks Stock rear shocks (self leveling) Racing Dynamics Stress Bar Stock front sway bar Dinan rear sway bar - 21mm M5 aluminum lower control arms Front tires: 245-40-18 Goodyear Eagle F1 GS-D3 on 8.5" EuroTech rims Rear tires: 275-40-18 Michelin Pilot Sport PS1 on 9.5" EuroTech rims Exterior 25% Side tint 5% Rear tint BMW Mud flaps - rears trimmed to tire width Rear fender lips rolled Smoked side markers Zymol wax Way too many paint chips touched up Brakes Front Rotors: 850CSi, 324 X 30 mm, cross-drilled and slotted Rear Rotors: stock size, cross-drilled and slotted Pads: Hawk Performance Ceramic (may switch to HPS) Stainless steel lines Racing Blue brake fluid

• Trailing Arm Bushings - 20 Tons is not enough (pic) - erwin 2008-03-24 01:34:20 (279 views)
  • Turns out you don't need tonnage, just a $30 tool, and some cold air (pic) (url) - erwin 2008-03-30 22:29:41 (144 views)
  • Thank You - kfister 2008-03-25 22:23:35 (60 views)
    • You're welcome - erwin 2008-03-26 01:30:14 (70 views)
      • BavAuto are OE bushings, sachs or something. - kfister 2008-03-26 03:03:06 (72 views)
        • Yes, I noticed the name difference - erwin 2008-03-26 10:54:23 (54 views)
          • I know bmwautopartsdealer and am surprised they export. (pic) - kfister 2008-03-27 00:16:29 (109 views)
            • I think we have some misunderstandings - erwin 2008-03-27 01:39:06 (60 views)
              • haha confusion. - kfister 2008-03-27 03:57:59 (59 views)
                • Duh ! scroll to the right ! - And - Adjustable dog bones? - erwin 2008-03-27 10:16:12 (70 views)
                  • Dog bones are just heim joints? Sure you could probably roll your own (pic) - kfister 2008-03-28 03:47:57 (106 views)
                    • 750iL Trailing arm bushing dimensions (pic) - erwin 2008-03-30 00:52:54 (101 views)
  • Re: Trailing Arm Bushings - 20 Tons is not enough - geerhed 2008-03-24 07:29:10 (65 views)
    • Um, about 30 deg positive camber, maybe 3.0 inches toe-out - erwin 2008-03-24 10:30:26 (94 views)
      • Re: Um, about 30 deg positive camber, maybe 3.0 inches toe-out - Isiah 90-735il 2008-03-26 04:52:52 (78 views)
        • Thanks, but they seem ok from the outside - should I break them apart? - erwin 2008-03-26 11:33:41 (59 views)
          • Dial indicator - kfister 2008-03-27 00:24:14 (55 views)
            • Thanks, I'll try that. (nt) - erwin 2008-03-27 10:18:18 (52 views)
          • Inner race is a two piece race (nt) - DG740I 3/93 2008-03-26 12:12:35 (53 views)