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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > PowerFlex SubFrame bushing Full Replacement DIY



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PowerFlex SubFrame bushing Full Replacement DIY
Published by robc1976
02-10-2013
PowerFlex SubFrame bushing Full Replacement DIY

Note: Not responsible for any damage to you or your car, this worked on my car so will work on yours.

***This tutorial assumes you know how to get your car secured on jack stands, if in doubt do NOT attempt this DIY!

Tools Need not in pic (2 jacks if possible & block of wood, (1) for a safety catch in case jack stand fail (I saw this happen and will NEVER forget it)....safety 1st). The 2nd jack is for jacking up suspension up to ride height.


Torque specs:

Subframe bolts (65 Ft lbs)
Strut bolts (25 ft lbs)

Suggestions:

I highly suggest a impact wrench.
I used a 14MM 12Pt socket instead of a E18 on subframe bolts.
If you can source a 3/34" inside diameter pipe you can skip a few spteps...I got tired of looking for one...I got each bushing out in less than 15 mins.

Note: I was in the middle of a wavetrac install so my exhaust and differential where not in place, You may have to unbolt half shafts...I will update thread in a day or so.

Rear bushings:


























Front bushings:

Click this link before beggining for correct orientation (thanks to "SteveAZ" for bring this to my attention)


http://www.powerflex.co.uk/i/product_images/5-420fi.pdf
































Reference pic of diameter of rear subframe bushing"

__________________
JB4 G5 ISO+BMS flash,Walbro 455 LPFP, DO meth kit 4-AN SS lines, BMS OCC, RB turbos W/3.5 N20 sensor, RB valve, BMS DCI, 3" AR kittyless Dps, Strett 2 oil OC W/ SS lines, ER FMIC, ER CP W/HKS BOV, M3 control arms, M3 Strut Brace, M3 front sway-bar, Meyle HD tie-rods, HPA rear toe arms, Wavetrac LSD, DEFIV differential kit, BC Coil-overs, Power-Flex subframe bushings, stoptech slotted rotors, Rogue Tranny Mounts, Concept 1 CS-5.0 rims,
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  #1  
By robc1976 on 02-11-2013, 03:11 PM
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added reference pic of diameter of bushing to DIY at end
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  #2  
By sammy_0559 on 02-17-2013, 11:27 PM
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you are probably the best thing that happened to this forum. i like posting up DIYs as i go but don't mod my car as rapidly as you
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  #3  
By robc1976 on 02-17-2013, 11:51 PM
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Quote:
Originally Posted by sammy_0559 View Post
you are probably the best thing that happened to this forum. i like posting up DIYs as i go but don't mod my car as rapidly as you
I appreciate that man!
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  #4  
By robc1976 on 03-21-2013, 06:31 PM
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Edited first post with size of waterpump socket:

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  #5  
By SneakyDeeky on 03-24-2013, 10:40 PM
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Excellent work once again. I think this mod may be in my near future. Any feedback on on the feel / handling impact of these over OEM?

Also, how many miles were on your OEM bushings before being replaced?
I ask b/c it helps provide context for the subjective handling improvement.
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  #6  
By robc1976 on 03-24-2013, 11:35 PM
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Average 67%
Quote:
Originally Posted by SneakyDeeky View Post
Excellent work once again. I think this mod may be in my near future. Any feedback on on the feel / handling impact of these over OEM?

Also, how many miles were on your OEM bushings before being replaced?
I ask b/c it helps provide context for the subjective handling improvement.
car had 105,000 and a huge improvement....when hiring s bump it does not transfer to the otherside...better planted....huge improvement at WOT.
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  #7  
By SneakyDeeky on 03-27-2013, 08:14 PM
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Average 20%
Quote:
Originally Posted by robc1976 View Post
car had 105,000 and a huge improvement....when hiring s bump it does not transfer to the otherside...better planted....huge improvement at WOT.
Thanks for the feedback. Sounds like it was worthwhile.
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  #8  
By robc1976 on 03-27-2013, 10:54 PM
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5
Average 67%
Quote:
Originally Posted by SneakyDeeky View Post
Thanks for the feedback. Sounds like it was worthwhile.
It was for sure!
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  #9  
By minivan on 03-31-2013, 06:40 PM
You're my hero
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