N54 Motor Mount Upgrade?

JamesM3M5 · 12-19-2011, 05:35 PM

Quote:

Originally Posted by Rob@Cobb

I'm not 100% sure, but I think the UUC tranny mounts will fit the E9xs. The black rubber mounts with the enforcer cups should transmit little to no vibration. I had them in a E36 and E46 M3 and have been thinking about getting them for my E90.

Cheers,
Rob

Not to bash anyone's stuff, but ALL aftermarket trans mounts are inferior as far as durability is concerned. I've replaced more beaten, torn, and simply broken trans mounts on customer street and track cars. The only mount I recommend for any E36/46/90 transmission is the E46 M3 trans mount. They are $31 a pair from getbmwparts.com. 22 32 2 282 340.

I've also seen a lot of failed urethane motor mounts, even from cars with half the torque and just a few sessions on track. For the Grand Am 328i racecar, we drilled holes in the factory rubber mounts to drain the fluid, cut off the bottom plastic cap, and filled the top and bottom voids with urethane. The urethane can come loose and fall out due to its shape, so I took the perfect form of the urethane plug that popped out after it was cured, covered it with primer and rubber adhesive, and pressed it back into the void in the mount. I then welded an aluminum plate on the bottom to hold the urethane in place.

drm916 · 12-07-2012, 02:13 PM

Quote:

Originally Posted by JamesM3M5

Not to bash anyone's stuff, but ALL aftermarket trans mounts are inferior as far as durability is concerned. I've replaced more beaten, torn, and simply broken trans mounts on customer street and track cars. The only mount I recommend for any E36/46/90 transmission is the E46 M3 trans mount. They are $31 a pair from getbmwparts.com. 22 32 2 282 340.

I've also seen a lot of failed urethane motor mounts, even from cars with half the torque and just a few sessions on track. For the Grand Am 328i racecar, we drilled holes in the factory rubber mounts to drain the fluid, cut off the bottom plastic cap, and filled the top and bottom voids with urethane. The urethane can come loose and fall out due to its shape, so I took the perfect form of the urethane plug that popped out after it was cured, covered it with primer and rubber adhesive, and pressed it back into the void in the mount. I then welded an aluminum plate on the bottom to hold the urethane in place.

So the e46 M3 transmount Part# 22322282340 fits e90/E92 cars? I am replacing my clutch and might as well replace these at at the same time.

I just want to reduce some of the slop when shifting under full load. And I am not sure about the aftermarket mounts.

bas2000 · 11-26-2013, 09:57 PM

i just bought the 335IS passenger side motor mount for my E92 335i

any DIY guides out there or anyone else try it?

nikitino25 · 11-26-2013, 11:18 PM

One reason an upgraded motor mount could be key is to prevent the power steering pulley from contacting the subframe which can happen on early build cars. (there's a TIS regarding this I believe) I'm interested to see the difference between the 335is left side mount and regular mount....

ItsaGoose · 07-25-2014, 10:50 AM

Any updates on the 335is motor mount or M3 tranny mount?

07-25-2014, 11:23 AM

Quote:

Originally Posted by ItsaGoose

Any updates on the 335is motor mount or M3 tranny mount?

Yes. I run both on my car.

Myrder · 07-25-2014, 12:27 PM

Quote:

Originally Posted by FCobra94

Yes. I run both on my car.

You are running which Series M3? I was looking at the diagrams for the F80 M3/M4 and it would appear the transmission mount from those could transfer over to us...

07-27-2014, 01:10 PM

E46 M3

Julian2485 · 07-28-2014, 01:21 AM

Which mounts would be better the 335is mounts or e46 m3 mounts for us e90 guys and I'm xi idk if that makes a difference or not

JMARS · 07-28-2014, 06:29 AM

Quote:

Originally Posted by FCobra94

Yes. I run both on my car.

So 335is engine mounts and e46 m3 tranny mounts?
2 questions:
-335is manual or DCT engine mount?
-e46 M3 manual or SMG tranny mount?

Ingeniator · 07-28-2014, 08:28 AM

Quote:

Originally Posted by JMARS

So 335is engine mounts and e46 m3 tranny mounts?
2 questions:
-335is manual or DCT engine mount?
-e46 M3 manual or SMG tranny mount?

335is left mount is common to both trans. Same for E46 trans mounts. I would recomend the billet PTF mounts if your not really worried about NVH.

J. Dub · 11-17-2015, 12:30 PM

Quote:

Originally Posted by FCobra94

Yes. I run both on my car.

FCobra94 , it's been a year. Why did you upgrade? Do you like the upgrade? Any bad NVH?
How is it holding up?

11-17-2015, 04:21 PM

Upgraded both because "I was in there anyway." No more NVH over factory mounts to speak of. Not sure about the 335is motor mount, but the M3 trans mounts are stiffer for sure!

May consider the Black Forest stage 1 motor mounts if I do any further upgrades like turbos, etc. in the future. My current motor mounts still let the engine rock pretty noticably when abruptly letting off the throttle after going WOT.

ajsalida · 11-17-2015, 05:49 PM

Slightly OT but the other day I replaced LF axle on my XI. 44k miles. You have to carefully pop the axle out of the diff with a pry bar levered against the subframe. While doing that I was amazed how much the entire engine assembly moved, engine mounts are for shit on this car. Will do the IS mount next time I'm in there on the R side. There is only one tranny/transfer case mount, I doubt anybody makes a better one unfortunately.

Julian2485 · 11-17-2015, 07:22 PM

Quote:

Originally Posted by ajsalida

Slightly OT but the other day I replaced LF axle on my XI. 44k miles. You have to carefully pop the axle out of the diff with a pry bar levered against the subframe. While doing that I was amazed how much the entire engine assembly moved, engine mounts are for shit on this car. Will do the IS mount next time I'm in there on the R side. There is only one tranny/transfer case mount, I doubt anybody makes a better one unfortunately.

I actually changed the xi tranny/transfer mount it helped make my shifts a little smoother but that bushing is soft smh.

Julian2485 · 11-17-2015, 07:24 PM

Can the IS motor mount be used for both the left and right side ?

Jklad · 11-18-2015, 09:21 AM

Quote:

Originally Posted by Julian2485

Can the IS motor mount be used for both the left and right side ?

Nope

They are side specific on the IS. One side is upgraded, the other side is the same on all n54 (e90s)

kong24680 · 11-18-2015, 02:03 PM

I'm planning on swapping all my bushings to solid in about a month. I currently run solid turner diff bushings and m3 subframe bushings and can honestly say I barely notice any NVH over stock. I totally regret getting the m3 subframe bushings since I still feel the rear is a little bit wobbly. I'm also planning on running Ohlins coilovers since I've heard they are quite soft and offer great dampening on the street. I'll try to give some feedback once I get them in.

Julian2485 · 11-18-2015, 05:53 PM

Quote:

Originally Posted by Jklad

Quote:

Originally Posted by Julian2485

Can the IS motor mount be used for both the left and right side ?

Nope

They are side specific on the IS. One side is upgraded, the other side is the same on all n54 (e90s)

Thanks

BigHoncho · 11-19-2015, 05:49 AM

Quote:

Originally Posted by Jklad

Nope

They are side specific on the IS. One side is upgraded, the other side is the same on all n54 (e90s)

Does the IS mount also fit on an AT x-drive?

J. Dub · 12-01-2015, 05:11 PM

Quote:

Originally Posted by BigHoncho

Does the IS mount also fit on an AT x-drive?

Good question

bleedsblue0023 · 12-26-2015, 02:59 PM

Did you guys look at the Turner sold UUC trans mounts at all?

http://www.turnermotorsport.com/p-37...enforcers.aspx

11-26-2013, 09:57 PM	#25
bas2000 AMG LOL 19 Rep 127 Posts Drives: 6MT like you stole it!! Join Date: May 2009 Location: INDY iTrader: (2)	i just bought the 335IS passenger side motor mount for my E92 335i any DIY guides out there or anyone else try it?
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11-26-2013, 11:18 PM	#26
nikitino25 Captain 91 Rep 817 Posts Drives: '07 E92 335i Join Date: Dec 2011 Location: Missouri iTrader: (2)	One reason an upgraded motor mount could be key is to prevent the power steering pulley from contacting the subframe which can happen on early build cars. (there's a TIS regarding this I believe) I'm interested to see the difference between the 335is left side mount and regular mount....
	Appreciate 0 Quote

07-25-2014, 10:50 AM	#27
ItsaGoose Private First Class 49 Rep 196 Posts Drives: 2016 6MT M4 Join Date: Apr 2013 Location: Seattle, WA iTrader: (3)	Any updates on the 335is motor mount or M3 tranny mount?
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07-27-2014, 01:10 PM	#30
FCobra94 Guest 0 Rep n/a Posts Drives:	E46 M3
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07-28-2014, 01:21 AM	#31
Julian2485 Major 110 Rep 1,340 Posts Drives: Black lci e90 335 xdrive Join Date: Sep 2013 Location: New york iTrader: (1)	Which mounts would be better the 335is mounts or e46 m3 mounts for us e90 guys and I'm xi idk if that makes a difference or not
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11-17-2015, 04:21 PM	#35
FCobra94 Guest 0 Rep n/a Posts Drives:	Upgraded both because "I was in there anyway." No more NVH over factory mounts to speak of. Not sure about the 335is motor mount, but the M3 trans mounts are stiffer for sure! May consider the Black Forest stage 1 motor mounts if I do any further upgrades like turbos, etc. in the future. My current motor mounts still let the engine rock pretty noticably when abruptly letting off the throttle after going WOT.
	Appreciate 1 Quote

11-17-2015, 05:49 PM	#36
ajsalida Colonel 226 Rep 2,387 Posts Drives: 95 M3, 02 R1150GSA, 09 335xi Join Date: Aug 2010 Location: SW USA iTrader: (2)	Slightly OT but the other day I replaced LF axle on my XI. 44k miles. You have to carefully pop the axle out of the diff with a pry bar levered against the subframe. While doing that I was amazed how much the entire engine assembly moved, engine mounts are for shit on this car. Will do the IS mount next time I'm in there on the R side. There is only one tranny/transfer case mount, I doubt anybody makes a better one unfortunately.
	Appreciate 0 Quote

11-17-2015, 07:24 PM	#38
Julian2485 Major 110 Rep 1,340 Posts Drives: Black lci e90 335 xdrive Join Date: Sep 2013 Location: New york iTrader: (1)	Can the IS motor mount be used for both the left and right side ?
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11-18-2015, 02:03 PM	#40
kong24680 Captain 252 Rep 998 Posts Drives: Silverstone Metallic F06 M6 Gr Join Date: Feb 2014 Location: Bay Area iTrader: (5)	I'm planning on swapping all my bushings to solid in about a month. I currently run solid turner diff bushings and m3 subframe bushings and can honestly say I barely notice any NVH over stock. I totally regret getting the m3 subframe bushings since I still feel the rear is a little bit wobbly. I'm also planning on running Ohlins coilovers since I've heard they are quite soft and offer great dampening on the street. I'll try to give some feedback once I get them in.
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12-26-2015, 02:59 PM	#44
bleedsblue0023 KState ME PE 4 Rep 42 Posts Drives: 2011 335i Jet Black ZSP Join Date: Dec 2014 Location: West Houston, TX iTrader: (1)	Did you guys look at the Turner sold UUC trans mounts at all? http://www.turnermotorsport.com/p-37...enforcers.aspx __________________ Jet Black 2011 335i Sport 6MT: Mods: BMS Intake, JB4 Iso FF, COBB V2 BMS Pump BEF, CPe Charge-pipe, ETS 5", VRSF DP, BMS OCC, SS Brk Lines, BMS CDV, MFactory LSD + Solid Diff mounts, 650i Diff cover, Pure Inlet, Fuel-it Stg2 LPFP + Plat TBI, E46 Trans mounts, Turner Pedals, Mishimoto wheel lugs, Msport Interior, M3 armrest, M3 Control arms, EvolutionRaceWerks F30 TIC pipe
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