subframe bushing inserts on high mileage car?

jlcf22 · 02-07-2018, 11:58 PM

Is it to late to install rear subframe bushing inserts on my 93k mile car? was trying to avoid installing actual bushing since I heard its a PITA to install. Would appreciate some input thanks

TGTIW · 02-08-2018, 08:07 AM

I wouldn't think there would be any issues, unless the actual bushings are damaged.
You might notice a very slight perceived rise in the rear ride height, but that would only be a result of the inserts removing whatever slight sag that may have happened over time.

feuer · 02-08-2018, 08:27 AM

Quote:

Originally Posted by TGTIW

You might notice a very slight perceived rise in the rear ride height, but that would only be a result of the inserts removing whatever slight sag that may have happened over time.

Incorrect.

Spitfire007 · 02-08-2018, 08:50 AM

This is NOT high mileage..

TGTIW · 02-08-2018, 09:02 AM

Quote:

Originally Posted by feuer

Incorrect.

I would argue this point.

TGTIW · 02-08-2018, 09:21 AM

it's conceivable that over time there would be vertical sag in the rubber connecting the metal inner core of the bushing to the outer housing. The inserts, while mitigating horizontal movement in the rubber bushing, also affect vertical movement. So while they aren't in actuality raising the ride height, I do believe they return it to a more stock location.

feuer · 02-08-2018, 10:26 AM

Quote:

Originally Posted by TGTIW

I would argue this point.

Quote:

Originally Posted by TGTIW

it's conceivable that over time there would be vertical sag in the rubber connecting the metal inner core of the bushing to the outer housing. The inserts, while mitigating horizontal movement in the rubber bushing, also affect vertical movement. So while they aren't in actuality raising the ride height, I do believe they return it to a more stock location.

Ok argue all you want but the E9x rear suspension geometry will prove you incorrect because if inserts are altering the vehicle height then it will make it lower not higher.

TGTIW · 02-08-2018, 10:55 AM

Yoinks. I thought the rear spring was contained within the subframe, but I see that the upper mount is on the body, so you're correct.

feuer · 02-08-2018, 11:29 AM

Quote:

Originally Posted by TGTIW

Yoinks. I thought the rear spring was contained within the subframe, but I see that the upper mount is on the body, so you're correct.

http://www.e90post.com/forums/showpo...4&postcount=18

jlcf22 · 02-08-2018, 12:22 PM

So it shouldn't be a problem with 93k miles? I don't track my car but I am at 675whp just want to keep it stiff when I do 3rd gear pulls

feuer · 02-08-2018, 12:33 PM

Quote:

Originally Posted by jlcf22

So it shouldn't be a problem with 93k miles? I don't track my car but I am at 675whp just want to keep it stiff when I do 3rd gear pulls

675whp on AT ? I would look into diff lockdown as well. Search for VWetish on N54tech.com

jlcf22 · 02-08-2018, 01:50 PM

Quote:

Originally Posted by feuer

675whp on AT ? I would look into diff lockdown as well. Search for VWetish on N54tech.com

Thanks i will look into that. Next question is which inserts to go with either the whiteline or powerflex black racing?

feuer · 02-08-2018, 02:59 PM

Quote:

Originally Posted by jlcf22

Thanks i will look into that. Next question is which inserts to go with either the whiteline or powerflex black racing?

If there is a difference it will be negligible so buy those that are cheaper.

LMB335IS · 02-08-2018, 06:06 PM

Screw the inserts. If you're really at 675whp you should be looking at black poly Powerflex or solids. And the diff lockdown, diff bushings, trans bushings. A whole rear-end refresh of the suspension wouldn't hurt either. You want to eliminate as much play as you can. There's absolutely nothing about the ass end of our cars that is engineered for big power.

r4dr · 02-09-2018, 11:47 AM

Would an LSD be a good idea for the OP if he's at that power level?

feuer · 02-09-2018, 11:57 AM

Quote:

Originally Posted by r4dr

Would an LSD be a good idea for the OP if he's at that power level?

I honestly doubt that power level on AT and tires will help more than LSD ever will.

maddmatth · 02-09-2018, 03:52 PM

At that power level you've obviously spent big on your car, so I'd advise just to "do it once, do it right".
Solid bushings + diff lockdown brace as suggested above. These do not hurt street dive-ability or comfort. AKG red bushings + a simple metal diff brace here, and it's my daily.

jlcf22 · 02-10-2018, 06:13 PM

thanks for the input guys Im definitely going with a differential brace. As far as bushing I'm looking at the AKG's since their easier to install and have seen good reviews. The thing that looks dreadful are taking out the old stock bushing thats why I was considering inserts. Im just wondering if its worth it so spend all day installing and cursing lol taking out the bushings

02-07-2018, 11:58 PM	#1
jlcf22 Lieutenant 100 Rep 502 Posts Drives: 335i09 Join Date: Jan 2012 Location: bakersfield CA iTrader: (0)	subframe bushing inserts on high mileage car? Is it to late to install rear subframe bushing inserts on my 93k mile car? was trying to avoid installing actual bushing since I heard its a PITA to install. Would appreciate some input thanks
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02-08-2018, 08:07 AM	#2
TGTIW Second Lieutenant 130 Rep 245 Posts Drives: 2010 328i Join Date: May 2013 Location: Knoxville iTrader: (2)	I wouldn't think there would be any issues, unless the actual bushings are damaged. You might notice a very slight perceived rise in the rear ride height, but that would only be a result of the inserts removing whatever slight sag that may have happened over time.
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02-08-2018, 08:50 AM	#4
Spitfire007 Captain 189 Rep 682 Posts Drives: 09 328i Sport 6MT Join Date: Dec 2011 Location: Baltimore, MD iTrader: (0) Garage List 2009 BMW 328i [0.00]	This is NOT high mileage..
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02-08-2018, 09:21 AM	#6
TGTIW Second Lieutenant 130 Rep 245 Posts Drives: 2010 328i Join Date: May 2013 Location: Knoxville iTrader: (2)	it's conceivable that over time there would be vertical sag in the rubber connecting the metal inner core of the bushing to the outer housing. The inserts, while mitigating horizontal movement in the rubber bushing, also affect vertical movement. So while they aren't in actuality raising the ride height, I do believe they return it to a more stock location.
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02-08-2018, 10:55 AM	#8
TGTIW Second Lieutenant 130 Rep 245 Posts Drives: 2010 328i Join Date: May 2013 Location: Knoxville iTrader: (2)	Yoinks. I thought the rear spring was contained within the subframe, but I see that the upper mount is on the body, so you're correct.
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02-08-2018, 12:22 PM	#10
jlcf22 Lieutenant 100 Rep 502 Posts Drives: 335i09 Join Date: Jan 2012 Location: bakersfield CA iTrader: (0)	So it shouldn't be a problem with 93k miles? I don't track my car but I am at 675whp just want to keep it stiff when I do 3rd gear pulls
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02-08-2018, 06:06 PM	#14
LMB335IS Sua Sponte 1299 Rep 2,849 Posts Drives: 2013 LMB 335is Join Date: May 2008 Location: FOB FL iTrader: (21) Garage List 2013 BMW 335is [8.84]	Screw the inserts. If you're really at 675whp you should be looking at black poly Powerflex or solids. And the diff lockdown, diff bushings, trans bushings. A whole rear-end refresh of the suspension wouldn't hurt either. You want to eliminate as much play as you can. There's absolutely nothing about the ass end of our cars that is engineered for big power. __________________ 335is/DCT-M3 GTS software-M3 drivetrain-M3 GWS-KOMBI-DSC-SZL/MHD/BQ Tuning IG@ClustersandCoding
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02-09-2018, 11:47 AM	#15
r4dr First Lieutenant 172 Rep 392 Posts Drives: various BMWs Join Date: Oct 2015 Location: Seattle, WA iTrader: (0)	Would an LSD be a good idea for the OP if he's at that power level?
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02-09-2018, 03:52 PM	#17
maddmatth Major 555 Rep 922 Posts Drives: F82 M4, E92 335i Join Date: Jun 2015 Location: New Zealand iTrader: (0)	At that power level you've obviously spent big on your car, so I'd advise just to "do it once, do it right". Solid bushings + diff lockdown brace as suggested above. These do not hurt street dive-ability or comfort. AKG red bushings + a simple metal diff brace here, and it's my daily.
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02-10-2018, 06:13 PM	#18
jlcf22 Lieutenant 100 Rep 502 Posts Drives: 335i09 Join Date: Jan 2012 Location: bakersfield CA iTrader: (0)	thanks for the input guys Im definitely going with a differential brace. As far as bushing I'm looking at the AKG's since their easier to install and have seen good reviews. The thing that looks dreadful are taking out the old stock bushing thats why I was considering inserts. Im just wondering if its worth it so spend all day installing and cursing lol taking out the bushings
	Appreciate 0 Quote