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06-18-2013, 03:17 PM | #89 | |
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06-18-2013, 04:06 PM | #90 | |
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If you are doing the subframe bushings at the same time he can drop the subframe and do the diff bushings out of the car I believe and the total job in and out would take probably 7-8 hours. My shop did not use/make a jig to replace subframe or have the tool to remove the stock subframe bushing (used a drill/air hammer). Malek has said that you must use a jig or frame machine to ensure that the subframe goes back in straight. He said there is enough play to put it together "off" center. I didn't do it this way and wonder if I have any issues. My shop did say that it probably wasn't necessary since when putting the subframe back in place if you don't put it in straight the pins would push the bushings back out. However, with that said, I tend to trust Malek more since he has more experience working on the car. I don't know if I have any ill effects from the install but the car seems to track and drive straight. I wonder if Malek could comment if I have anything to worry about due to the way it was installed. Thanks. Vin |
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06-18-2013, 06:29 PM | #91 |
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The jig I made was a 2 1/2" Black 3 pipe about 4 inches long, 1/2 all thread, 4 2" washers, 2 1 1/2" washers, 4 19mm nuts, and an old oil filter socket that goes over the pipe. The removal was very easy may be 15 minutes all three, putting them back was easy except one that gave me a little problem.
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06-18-2013, 07:01 PM | #93 |
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The BMW Motorsport subframe mounts that Turner sells may be a good alternative for people who want stiff and strong subframe bushings but not so much the noises. They are harder than the stock M bushings but made of rubber. Also no need to lube like polyurethane bushings.
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06-19-2013, 06:25 AM | #94 |
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No need to lube poly MOUNTS like the subframe and diff, at least based on my experience of running them for years in my E36M3. You may need to lube poly BUSHINGS. The poly rear trailing arm bushings in my E36M3 squeaked a little in cold and/or cool/damp weather despite regreasing with marine grease, though I have never had any squeaks from my poly front control arm bushings.
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06-19-2013, 08:18 AM | #95 | ||
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Curiously, how might you tackle the subframe bushings if you were to do that? |
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06-19-2013, 09:28 AM | #96 |
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That jig worked for the front differential and the upper differential bushing, no issues it looked a little big but it work unless you can find a 2 1/4 pipe. If I ever do the subframe bushings I'll try this easy to make jig, http://www.e90post.com/forums/showth...=643435&page=2
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06-19-2013, 01:53 PM | #98 | |
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To drop the sub-frame out and do the job that way, it will take approximately 12 hours total as the car has to be aligned again as well. It's definitely recommended that the frame go in indexed properly with respect to the front axle and laterally. However, if match marks are used before the frame is removed from the car (BMW does ensure the frame is perfectly positioned at the factory) then you can use this technique to get it back into the same position as before. When my sub-frame, differential and mounts broke at 3,xxx miles, the dealer replaced the sub-frame, diff and miscellaneous components, however they attempted to align the car 3 times and failed each and every time. Not to my surprise, the frame was not indexed correctly and I had to end up doing it and all was well from then on out.
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06-19-2013, 03:20 PM | #99 |
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Thanks so much Malek. You are a wealth of knowledge.
I didn't realign my car because none of the arms were moved and the subframe came out as one single unit so I thought the alignment wouldn't be out of whack (assuming the subframe was put back properly - which I think now could have been done incorrectly (without markings or jig)). I will align the car to see if everything is OK and if not I guess you would have to have a frame straightening machine to get everything back into place? Any other suggestions to check this? Thanks again for all the help and information. Vin |
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08-05-2013, 08:36 AM | #100 | |
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Malek, I just ordered the TMS solid delrin diff mounts. How many hours will it take to install?
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10-09-2013, 06:02 PM | #102 |
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An update for the community on the progress. This "package" will be ready to go for all E9x platforms in the following 2-3 weeks with various options on Sub-Frame upgrades and reinforcement.
For now, here are a few pictures of the MRF Engineering Motorsport E9x axle carrier bushings.
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10-10-2013, 10:48 PM | #103 | |
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04-08-2017, 07:07 PM | #105 |
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Hello guys. Please, help me ..
I have M3 E92 DCT 2010. Already long time I feel slight hesitation when I application / release the throttle on the high speed. Nearest past I feel already some bumps from my rear subframe... I checked all and can tell the next problems. Do not know normal it or not. 1) I noticed that my bushings of differential looks good, but I did not touch the bolts. Is it possible to not see of my bolts of bushings are already damaged? Do I need to rock my differential for it? But I repeat - the bushings looks like a good, but I drived my car already a long time with this feeling of hesitiation of differential. 2) I noticed some small backlash of my axle half shaft (passenger side). It does not prodused some knocking when I rock it by my hands, but it has some backlash. Do not know is it normal or not. From the driver side it has a backlash but a little bit less than on passenger side. 3) I see some backlash in output flanges of differential. It seems that it holds only on slots without any bearings, so it seems that it is normal. Please, help my to solve this problem. What I should to check more? One more question: Is it normal that my output flange of DCT has some radial backlash? Sorry for my English. Thanks. |
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04-10-2017, 08:07 AM | #106 |
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Hi all!
Are those bushings better than solid AL in terms of VNH ? http://alekshop.com/products/aleksho...ngs_bmw_e9x_m3 Or powerflex is more quiet and enough rigid to solve diff issue? Thanks. |
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05-10-2017, 08:54 AM | #107 | |
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