E90Post
 


ECS BMW
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Flywheel 6 or 8 bolt



Reply
 
Thread Tools Search this Thread
      07-09-2013, 05:19 PM   #1
vertigo44
Private
14
Rep
97
Posts

Drives: 08 AW 335i Coupe
Join Date: Jan 2011
Location: VA

iTrader: (0)

Flywheel 6 or 8 bolt

After 30 minutes of searching I gave up...sorry. What years come with the 8 bolt and what years with the 6 bolt? Or is it a 335i vs 335is thing? Please explain.

I just ordered a spec II+ hybrid and got an 8 bolt and want to make sure i have the right part before install. I know i've seen it before but just cant find it anywhere.
__________________
2008 AW 335i Coupe - JB4 G5/ISO, DCI, DPs, E85
Appreciate 0
      07-09-2013, 07:26 PM   #2
3000GT MR
Major
3000GT MR's Avatar
United_States
255
Rep
1,395
Posts

Drives: 09 335i/3000gt vr4
Join Date: Jun 2012
Location: Sav GA

iTrader: (6)

Switch to 6 bolt was 2/2009 I've read some places it was 1/2009. My car is a 2/2009 and it was a bolt. I bought both flywheels so i only had to do everything once incase it was a 8 bolt. The IS and 1M both utilize 6 bolt
__________________
Have a single turbo and/or tired of burning up O2 sensors? Ask me about the new ADV O2 sensor retro kits!
335i 2010 e92 M-sport Mods: VM Top mount 6466, Aquamist HSF4 w/custom direct port. VRSF IC + Exhaust
335i 2009 e90 665RWHP VFF900 ST RIP .
Appreciate 0
      07-09-2013, 07:27 PM   #3
3000GT MR
Major
3000GT MR's Avatar
United_States
255
Rep
1,395
Posts

Drives: 09 335i/3000gt vr4
Join Date: Jun 2012
Location: Sav GA

iTrader: (6)

Sorry i can't edit from the app. Mine was a 6 bolt.
__________________
Have a single turbo and/or tired of burning up O2 sensors? Ask me about the new ADV O2 sensor retro kits!
335i 2010 e92 M-sport Mods: VM Top mount 6466, Aquamist HSF4 w/custom direct port. VRSF IC + Exhaust
335i 2009 e90 665RWHP VFF900 ST RIP .
Appreciate 0
      07-10-2013, 08:01 AM   #4
vertigo44
Private
14
Rep
97
Posts

Drives: 08 AW 335i Coupe
Join Date: Jan 2011
Location: VA

iTrader: (0)

Gotcha. Thanks! I think i am good to go with the 8 bolt. Only time will tell. I want this swap to be as painless and fast as possible or withdrawls may insue.
__________________
2008 AW 335i Coupe - JB4 G5/ISO, DCI, DPs, E85
Appreciate 0
      07-10-2013, 10:56 AM   #5
Jeff@TopGearSolutions
BimmerPost Supporting Vendor
Jeff@TopGearSolutions's Avatar
United_States
3278
Rep
75,711
Posts


Drives: C6 Z06, 09 335i, 10 335xi
Join Date: Dec 2008
Location: www.TopGearSolutions.com

iTrader: (37)

You can ask us. We sell a bunch of Spec Clutches a week.

2/2009 and later production dates are supposed to be 6 bolt. That's why on our site we have you select your production date of your vehicle so we can send out the right part as most people don't know what they need.

You have the right part for your 2008. (8 bolt).
__________________
|Like us on Facebook||Evolution Racewerks| |Active Autowerke| |ETS| |Burger Tuning| |PURE Turbos| |Mishimoto||VRSF| |AWE| |Wagner|

|Summer Discounts - Up to 20% Off!| |KW| |Spec| |ST Coilovers| |Koni| |Bilstein| |Borla| |Magnaflow| |AFE| |Fabspeed| |Injen| Discounts VRSF ER BM3 CSF Pure & More!
Appreciate 0
      06-01-2016, 02:39 AM   #6
Nordic335M3
Second Lieutenant
Nordic335M3's Avatar
Denmark
15
Rep
249
Posts

Drives: 335i M3 Look
Join Date: Feb 2014
Location: Denmark

iTrader: (0)

Garage List
What would it take to install a 6 bolt engine, in an older 8 bolt car?...
__________________
E92 335i 2007 Crimson Red 6MT M3 look-ER CP-TIAL BOV-Burger DCI-DP-DeCAT-Turbo: billet comp. wheels-JB4-CDV-M3 swaybar(front)- MHD FLASHED
Appreciate 0
      06-01-2016, 06:10 AM   #7
3000GT MR
Major
3000GT MR's Avatar
United_States
255
Rep
1,395
Posts

Drives: 09 335i/3000gt vr4
Join Date: Jun 2012
Location: Sav GA

iTrader: (6)

Quote:
Originally Posted by Nordic335M3 View Post
What would it take to install a 6 bolt engine, in an older 8 bolt car?...
Besides flywheel nothing at all. Personally id swap cam ledges and cams over from the 6 bolt to the 8. The 6 bolt cam ledges seem to have less issues, also the cams are hollow and machined vs the 8 bolt ones which are solid and look to be cast.
__________________
Have a single turbo and/or tired of burning up O2 sensors? Ask me about the new ADV O2 sensor retro kits!
335i 2010 e92 M-sport Mods: VM Top mount 6466, Aquamist HSF4 w/custom direct port. VRSF IC + Exhaust
335i 2009 e90 665RWHP VFF900 ST RIP .
Appreciate 0
      06-01-2016, 08:55 AM   #8
Nordic335M3
Second Lieutenant
Nordic335M3's Avatar
Denmark
15
Rep
249
Posts

Drives: 335i M3 Look
Join Date: Feb 2014
Location: Denmark

iTrader: (0)

Garage List
Quote:
Originally Posted by 3000GT MR View Post
Besides flywheel nothing at all. Personally id swap cam ledges and cams over from the 6 bolt to the 8. The 6 bolt cam ledges seem to have less issues, also the cams are hollow and machined vs the 8 bolt ones which are solid and look to be cast.
I see, thank you ..sounds like a big deal afterall..

if one were to rebuild a 8 bolt engine, would the newer cams & ledges be the prefered ones?
__________________
E92 335i 2007 Crimson Red 6MT M3 look-ER CP-TIAL BOV-Burger DCI-DP-DeCAT-Turbo: billet comp. wheels-JB4-CDV-M3 swaybar(front)- MHD FLASHED
Appreciate 0
      08-28-2019, 11:40 AM   #9
Muz180
New Member
0
Rep
15
Posts

Drives: BMW 335xi
Join Date: Jul 2019
Location: Naperville

iTrader: (0)

Quote:
Originally Posted by 3000GT MR View Post
Besides flywheel nothing at all. Personally id swap cam ledges and cams over from the 6 bolt to the 8. The 6 bolt cam ledges seem to have less issues, also the cams are hollow and machined vs the 8 bolt ones which are solid and look to be cast.
Reviving an ancient post lol but if I were to get the 6 bolt flywheel for a conversion would it effect my ECU in any way? And just for reassurance before I go out and buy a 6 bolt motor are you sure the flywheel is all that needs to be changed?
Appreciate 0
      08-28-2019, 03:04 PM   #10
nissubaru
Lieutenant
207
Rep
552
Posts

Drives: 09 335i MSport + 1990 300ZX TT
Join Date: Jan 2017
Location: Philadelphia

iTrader: (0)

Quote:
Originally Posted by Muz180 View Post
Reviving an ancient post lol but if I were to get the 6 bolt flywheel for a conversion would it effect my ECU in any way? And just for reassurance before I go out and buy a 6 bolt motor are you sure the flywheel is all that needs to be changed?
Probably gonna need a little more info, what are you trying to do? All that should really matter is the crank bolt pattern and having the corresponding flywheel. If you have a N54 motor from a car with a manufacture date up to January 2009 it will have an 8 bolt crank. You can easily determine this by looking at the front or back of the engine and counting the # of bolts on the crank. I didn't trust the dumbass fucking idiots who sell used motors cause they literally don't give a shit what they sell you so this was what I used.

I also bought the CarFax's for the motors I was hoping to buy, but caught one of the junkyards trying to pass off an 80k mile motor as a 46k mile motor.

But yeah, 8 bolt crank requires an 8 bolt flywheel. 6 bolt crank = 6 bolt flywheel. Don't worry about the cam ledges and shit, those are inside the motor and nothing you would need to worry about if doing an engine swap.
Appreciate 0
      09-02-2019, 04:13 PM   #11
Muz180
New Member
0
Rep
15
Posts

Drives: BMW 335xi
Join Date: Jul 2019
Location: Naperville

iTrader: (0)

Quote:
Originally Posted by nissubaru View Post
Probably gonna need a little more info, what are you trying to do? All that should really matter is the crank bolt pattern and having the corresponding flywheel. If you have a N54 motor from a car with a manufacture date up to January 2009 it will have an 8 bolt crank. You can easily determine this by looking at the front or back of the engine and counting the # of bolts on the crank. I didn't trust the dumbass fucking idiots who sell used motors cause they literally don't give a shit what they sell you so this was what I used.

I also bought the CarFax's for the motors I was hoping to buy, but caught one of the junkyards trying to pass off an 80k mile motor as a 46k mile motor.

But yeah, 8 bolt crank requires an 8 bolt flywheel. 6 bolt crank = 6 bolt flywheel. Don't worry about the cam ledges and shit, those are inside the motor and nothing you would need to worry about if doing an engine swap.
I have an 08 n54 and I got rod knock recently (spun rod bearing and its pretty bad). Anyways engine has been sitting out of the car and of course its an 8 bolt checked the crank and all. I was just wondering if I got a used engine if it would be better to go with a 6 bolt engine because I heard they have better cam ledges and etc. I just wanted to get some reassurance before I actually go out and put in an order for a 6 bolt motor. I should probably use Carfax also but I am going to get an engine with warranty on it anyways. I ran the VIN number on a supposedly 18k mile engine and it came back as 132k lol.
Appreciate 0
      11-19-2019, 05:41 AM   #12
Dr777
New Member
United_States
0
Rep
19
Posts

Drives: BMW 335i 2008
Join Date: Aug 2018
Location: Dallas Texas

iTrader: (0)

Garage List
2006 BMW 325i  [0.00]
2008 BMW 335i  [0.00]
Quote:
Originally Posted by nissubaru View Post
Probably gonna need a little more info, what are you trying to do? All that should really matter is the crank bolt pattern and having the corresponding flywheel. If you have a N54 motor from a car with a manufacture date up to January 2009 it will have an 8 bolt crank. You can easily determine this by looking at the front or back of the engine and counting the # of bolts on the crank. I didn't trust the dumbass fucking idiots who sell used motors cause they literally don't give a shit what they sell you so this was what I used.

I also bought the CarFax's for the motors I was hoping to buy, but caught one of the junkyards trying to pass off an 80k mile motor as a 46k mile motor.

But yeah, 8 bolt crank requires an 8 bolt flywheel. 6 bolt crank = 6 bolt flywheel. Don't worry about the cam ledges and shit, those are inside the motor and nothing you would need to worry about if doing an engine swap.
I think all crank pulleys have only 6 bolts. Mine had 6 on the pulley and 8 on the flywheel is there another way to tell? I swapped in a used engine from a x6 but have no idea the manufacturing date or even year I have the serial number printed under the intake but I dont know what I can do with it
Appreciate 0
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



All times are GMT -5. The time now is 03:40 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
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