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DIY: Do It Yourself
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Old 11-04-2016, 01:11 PM   #1
lingon300k
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Rear spring DIY

I made a quick DIY for replacing the rear springs.

The formatting here is a bit difficult to read, and annoying to work with, so I've posted it on my own site. Sorry if it's ugly. It's brand new and I haven't worked out the format or design of the site yet.

E46 Rear Spring DIY

Last edited by lingon300k; 11-04-2016 at 11:29 PM.
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Old 11-04-2016, 02:26 PM   #2
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Thanks for the DIY! Many will be helped by this.

I should note that due to the "Mango effect" around here, there will be folks who will look suspiciously at an off-site DIY.
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Old 11-04-2016, 02:54 PM   #3
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lol ^^^^^
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Old 11-04-2016, 05:38 PM   #4
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The torque for the shock to trailing arm is 74 ft-lbs.
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Old 11-04-2016, 09:27 PM   #5
lingon300k
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Quote:
Originally Posted by Spannerhead View Post
Thanks for the DIY! Many will be helped by this.

I should note that due to the "Mango effect" around here, there will be folks who will look suspiciously at an off-site DIY.
Thanks! I thought about the Mango effect before I did it, actually--so I laughed pretty hard when I read that! I'm actually planning to rewrite the other DIY for that site as well.

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Originally Posted by DiscoStu View Post
The torque for the shock to trailing arm is 74 ft-lbs.
Thanks for the info! Do you have a source I could reference in the DIY?

Last edited by lingon300k; 11-04-2016 at 09:36 PM.
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Old 11-04-2016, 09:43 PM   #6
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Originally Posted by DiscoStu View Post
The torque for the shock to trailing arm is 74 ft-lbs.
This is right... 100Nm=~74 ft/lb (74*1.3556)

according to this doc: http://www.argyrides.eu/bmw/mods/sus...que_values.pdf
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Old 11-04-2016, 09:46 PM   #7
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This is right... 100Nm=~74 ft/lb (74*1.3556)

according to this doc: http://www.argyrides.eu/bmw/mods/sus...que_values.pdf
Thanks! I'll post the info in the next few minutes.
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Old 11-04-2016, 10:49 PM   #8
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Great diy Lingon! I noticed all the leaves on the ground in the pics. I hate leaves lol when i did my rtabs last week i swept away all the leaves and with the wind i was sifting through leaves looking for tools fifteen minutes in
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Old 11-05-2016, 02:01 AM   #9
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Just don't do this with taller springs
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Old 11-05-2016, 08:29 AM   #10
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Great diy Lingon! I noticed all the leaves on the ground in the pics. I hate leaves lol when i did my rtabs last week i swept away all the leaves and with the wind i was sifting through leaves looking for tools fifteen minutes in
Thanks! I was waiting for someone to mention the leaves. It was actually raining a little bit, too. I had been working in the garage for days, and I didn't want to be inside anymore if I didn't absolutely have to be. My tools were on a cart, though. Luckily, it wasn't very windy.

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Just don't do this with taller springs
Not quite sure what you mean. The car is an xi. What taller springs might you be referring to?
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Old 11-06-2016, 01:34 AM   #11
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I installed some aftermarket lowering springs, they were much taller
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Old 11-06-2016, 12:57 PM   #12
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I installed some aftermarket lowering springs, they were much taller
I'm still not sure that I understand what you're saying. Your lowering spring would have been shorter than the stock height xi spring I installed.

If you're saying you had difficulty installing them, then maybe I get your point. You have to seriously extend the control arm to get the new spring in. It's a bit difficult, and you need to have the jack in the correct place so that you can insert the spring at the correct angle. Even still, you might need to bang it into place with your hand.
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Old 11-06-2016, 01:25 PM   #13
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Rear spring DIY

It helps if you use a pry bar to push on the control arm. Just enough to get the springs in or out.

It's good to add if one side is connected, the sway bar will be fighting you. Get both springs in first.
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Old 11-07-2016, 01:54 PM   #14
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Originally Posted by BKMrSteel View Post
It helps if you use a pry bar to push on the control arm. Just enough to get the springs in or out.

It's good to add if one side is connected, the sway bar will be fighting you. Get both springs in first.
Thanks for the note! I didn't consider the sway-bar before you mentioned it.

I'm probably going to update the DIY to advise doing both springs at the same time, instead of one after the other.
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Old 11-07-2016, 02:18 PM   #15
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Nice DIY. E39Source on YouTube also has a pretty good video on this
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Old 11-07-2016, 07:48 PM   #16
lingon300k
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Nice DIY. E39Source on YouTube also has a pretty good video on this
Thanks! I'll take a look at that video to see if there's anything I should note in my DIY.
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Old 11-08-2016, 08:38 AM   #17
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Good job on the DIY. I use a bottle jack to pry the beavertail open to remove the spring. It holds the tail down and I can use two hands to lift out the spring. Makes installation easy too as both hands are free. I disconnect the sway bar links first.

The bottom of the jack is on the hub knuckle (where the beavertail connects) and I use a hockey puck between the body underside and the top of the jack.

Pries it open great and takes minutes to pop in new pads and springs. I coat the pads with a little grease to make spring adjustment (turning) easy, then release the jack pressure. reconnect the sway bar link and done.
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Old 11-08-2016, 12:29 PM   #18
lingon300k
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Originally Posted by BMW-North View Post
Good job on the DIY. I use a bottle jack to pry the beavertail open to remove the spring. It holds the tail down and I can use two hands to lift out the spring. Makes installation easy too as both hands are free. I disconnect the sway bar links first.

The bottom of the jack is on the hub knuckle (where the beavertail connects) and I use a hockey puck between the body underside and the top of the jack.

Pries it open great and takes minutes to pop in new pads and springs. I coat the pads with a little grease to make spring adjustment (turning) easy, then release the jack pressure. reconnect the sway bar link and done.
Thanks! I used the spare tire jack because I wanted to make it as simple as possible, using an "extra" tool that everyone has in their car. A lot of the DIYs have said this is likely a two person job, because someone has to pry the control arm down while the other pulls the spring out or pushes it in. By using the spare tire jack, which is a lot like the method you described, it's easily done by one person.

I like the hockey puck idea. I probably would have done something similar with the base of the jack on the control arm if I'd had one. Another reason I like the spare tire jack for this is the plastic on the top of the jack where it goes against the body of the car.

----

I've edited the post to recommend doing both sides at once. Thanks again, BKMrSteel!

Last edited by lingon300k; 11-08-2016 at 12:30 PM.
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