BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      02-03-2016, 02:00 PM   #1
drewster99
Second Lieutenant
23
Rep
205
Posts

Drives: 1 SERIES
Join Date: Jun 2014
Location: USA

iTrader: (2)

Suspension Bolts/Nuts

When installing coilovers, do people typically just reuse all the bolts and hardware or buy all new stuff? I have done it in the past where I just reused them all and everything was fine but a friend of mine just mentioned that you're supposed to buy new hardware. I'll be installing coilovers in the next few weeks and want to get it right.

Thanks!
Appreciate 0
      02-03-2016, 05:47 PM   #2
E82MSport
First Lieutenant
E82MSport's Avatar
United_States
74
Rep
342
Posts

Drives: 08' Crimson 135i
Join Date: Sep 2013
Location: Rochester Hills - MI

iTrader: (0)

According to the service manual there are a handful of suspension bolts that should be replaced but that's highly debated depending on who you talk to.

On the front -
1. Top mount nuts can be reused (the 3 that hold the strut to the body)
2. Top mount gaskets (get new, they're cheap)
3. Top mounts (replace depending on condition)
4. Swaybar links (replace depending on condition)
5. Brake wear indicator (only 1 on driver's side, will probably break when removing)
5. Caliper bracket bolts - reuse (I advise you remove the caliper and bracket as an assembly, do not remove the 2 allen bolts holding the caliper to the bracket)
6. Rotor retaining screw (reuse if not damaged, apply anti-seize when installing hand tight)
7. ABS sensor allen bolt - reuse
8. Headlight level arm (unclip from control arm, do not remove nut)
9. Spindle pinch bolt that holds the strut - reuse
10. Lower control arm bolts (I've reused several times but have replaced once - remember they are torque to yield stretch bolts)

Rear suspension -
1. Upper shock mount (I would replace all the hardware)
2. Lower shock mount (unless the mount is bad there's no reason to replace anything)
3. New shocks should have new nuts for top and bottom
4. Swaybar links (replace depending on condition)
5. Lower control arm bolts - reuse
6. Lower and upper spring rubber (replace depending on condition)

There are kits out there that have everything you need when replacing suspension but they are expensive and most likely the majority of the hardware doesn't need replacing.

Here's the kit for ECS for example -
https://www.ecstuning.com/BMW-E82-13...its/ES2586384/
__________________
Ohlins Road & Track Coilovers / Apex ARC 8's 245/255-35 MPSS
Appreciate 0
      02-03-2016, 08:24 PM   #3
Suprgnat
It goes where I point it.
Suprgnat's Avatar
United_States
111
Rep
1,125
Posts

Drives: 2013 128i LMB 6MT Slicktop
Join Date: Jan 2013
Location: California

iTrader: (6)

Garage List
Quote:
Originally Posted by E82MSport View Post
According to the service manual there are a handful of suspension bolts that should be replaced but that's highly debated depending on who you talk to.
I think the only people that debate whether the torque-to-yield fasteners in our BMWs should be replaced are the people that didn't for whatever reason. Most of the time you'll be just fine...
__________________
I f**king love my car!
Appreciate 0
      02-04-2016, 12:50 PM   #4
drewster99
Second Lieutenant
23
Rep
205
Posts

Drives: 1 SERIES
Join Date: Jun 2014
Location: USA

iTrader: (2)

Quote:
Originally Posted by E82MSport View Post
According to the service manual there are a handful of suspension bolts that should be replaced but that's highly debated depending on who you talk to.

On the front -
1. Top mount nuts can be reused (the 3 that hold the strut to the body)
2. Top mount gaskets (get new, they're cheap)
3. Top mounts (replace depending on condition)
4. Swaybar links (replace depending on condition)
5. Brake wear indicator (only 1 on driver's side, will probably break when removing)
5. Caliper bracket bolts - reuse (I advise you remove the caliper and bracket as an assembly, do not remove the 2 allen bolts holding the caliper to the bracket)
6. Rotor retaining screw (reuse if not damaged, apply anti-seize when installing hand tight)
7. ABS sensor allen bolt - reuse
8. Headlight level arm (unclip from control arm, do not remove nut)
9. Spindle pinch bolt that holds the strut - reuse
10. Lower control arm bolts (I've reused several times but have replaced once - remember they are torque to yield stretch bolts)

Rear suspension -
1. Upper shock mount (I would replace all the hardware)
2. Lower shock mount (unless the mount is bad there's no reason to replace anything)
3. New shocks should have new nuts for top and bottom
4. Swaybar links (replace depending on condition)
5. Lower control arm bolts - reuse
6. Lower and upper spring rubber (replace depending on condition)

There are kits out there that have everything you need when replacing suspension but they are expensive and most likely the majority of the hardware doesn't need replacing.

Here's the kit for ECS for example -
https://www.ecstuning.com/BMW-E82-13...its/ES2586384/
Perfect, thank you!
Appreciate 0
      02-07-2016, 12:00 PM   #5
houtan
Lieutenant Colonel
houtan's Avatar
131
Rep
1,561
Posts

Drives: 2011 135i
Join Date: Jun 2013
Location: socal

iTrader: (8)

Garage List
2011 135i  [5.00]
For the torque to yield bolts, I reuse once and then replace. And I remove reinstall with hand tools vice air tools to minimize the amount of impact/load on the bolt.
Appreciate 0
      02-15-2016, 10:36 AM   #6
tracer bullet
Captain
tracer bullet's Avatar
United_States
55
Rep
956
Posts

Drives: '11 135i - AW w/ TC
Join Date: May 2011
Location: Saint Paul, MN

iTrader: (1)

Quote:
Originally Posted by houtan View Post
For the torque to yield bolts, I reuse once and then replace.
You can get away with it, but keep in mind after it's actually been used as a TTY bolt, re-using it means you are using a fundamentally different bolt.
Appreciate 0
      01-22-2017, 09:19 PM   #7
dojk
Private First Class
4
Rep
148
Posts

Drives: E82 135i
Join Date: Nov 2010
Location: Malaysia

iTrader: (0)

What about the reinforcement plates and rubber sealing grommets?
Appreciate 0
      01-23-2017, 03:59 AM   #8
John_01
Colonel
John_01's Avatar
Australia
103
Rep
2,466
Posts

Drives: E90 325i, E82 135i
Join Date: Mar 2009
Location: Sydney, Australia

iTrader: (0)

If using NEW bolts, the mechanic 'should' follow the tightening procedure in the BMW manuals.
I'm not sure if many mechanics actually do that - They are probably scared of breaking bolts that are supposed to be torqued to yield.

Last edited by John_01; 01-23-2017 at 06:08 AM.
Appreciate 0
      01-26-2017, 09:51 PM   #9
juld0zer
Private First Class
4
Rep
109
Posts

Drives: E82 135i 7DCT
Join Date: Jul 2016
Location: 2153

iTrader: (0)

Also beware of reusing the egg shaped nuts. This is where undoing fasteners using hand tools is better because you will be able to tell if it's an egg shaped nut or or if has threadlocker for example.

The pinch bolt which clamps the shock to the knuckle is not a mandatory replacement item apparently, but its egg shaped lock nut must be replaced.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 05:01 PM.




1addicts
1addicts
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST