Diff poly bush bolts

Discussion in 'E46 M3 (2001-2006)' started by AntOG76, Dec 3, 2017.

  1. 3 Dec 2017 at 7:49 PM #1
    AntOG76

    AntOG76 A mere Chipper

    Joined:
    May 15, 2017
    Messages:
    25
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Halifax west yorkshire
    Your Motor:
    2003 e46 m3 coupe
    Colour Combo:
    Lsb/Lsb
    Looking for an answer, when buying the powerflex diff bushes I'm I right in thinking they come there own bolts? The reason I ask is can the revised BMW diff bolts still be fitted when using the poly bushes?
    Thanks.
     
  2. 3 Dec 2017 at 7:53 PM #2
    bennn

    bennn Achieved official socks

    Joined:
    Mar 23, 2015
    Messages:
    1,382
    Likes Received:
    0
    Trophy Points:
    36
    Location:
    Shrewsbury
    Your Motor:
    B7 RS4 Avant
    Colour Combo:
    Sprint Blue / Black
    Don't do it mate. The banging they will cause will do your nut in.

    The revised bolts wont fit as they aren't long enough. Bolts are supplied but they aren't shanked so you get clunking.

    Changing mine back to standard / finding a solution to the clunking is currently on my to do list.
     
  3. 3 Dec 2017 at 8:10 PM #3
    AntOG76

    AntOG76 A mere Chipper

    Joined:
    May 15, 2017
    Messages:
    25
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Halifax west yorkshire
    Your Motor:
    2003 e46 m3 coupe
    Colour Combo:
    Lsb/Lsb
    I already have them fitted, but I didn't see them before they went in as my garage got them at a better price. I thought they came with bolts but was just checking. Mine has a clunk when going on & off the throttle which was there before the bushes and I don't think it's any worse after fitting. I was just wondering if I could fit the revised bolts to see if it improved any. surely you should be able to get some collard bolts that fit with the poly bushes?
     
  4. 3 Dec 2017 at 9:06 PM #4
    rem1858

    rem1858 Wearing official underwear

    Joined:
    Aug 6, 2015
    Messages:
    299
    Likes Received:
    2
    Trophy Points:
    18
    Location:
    East Yorkshire
    Your Motor:
    E46 M3
    Colour Combo:
    Imola Red / Imola Red
    Powerflex come with their own bolts. OEM wont fit.
    My clunk is worse for fitting powerflex, will change back at some point in the future, but I believe you have to buy the entire diff cover with OEM bushes pre-installed..
     
  5. 3 Dec 2017 at 9:11 PM #5
    HARBER07

    HARBER07 Achieved official socks

    Joined:
    Aug 19, 2013
    Messages:
    1,373
    Likes Received:
    1
    Trophy Points:
    38
    Location:
    Suffolk
    Your Motor:
    2003 BMW M3 VF570
    I still don't understand all this diff bolt ********. I've had power flex black bushes fitted for a couple of years now and they don't give me any more banging than the stock bushes did, just slightly more NVH which is a given.

    There is no such thing as miracle bolts to solve diff banging. The original specification has identical dimensions to the revised part number bolt. The only visual difference being the new unthreaded shoulder. However the diameter across this section is identical to the original part.

    Maybe the grade was changed to give a superior clamping force, which in turn stops diff moving and therefore the banging. My view is its a fitting error every time when it comes to the power flex bushes. Make sure they are torqued up to spec and not just tight.
     
  6. 3 Dec 2017 at 9:50 PM #6
    AntOG76

    AntOG76 A mere Chipper

    Joined:
    May 15, 2017
    Messages:
    25
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Halifax west yorkshire
    Your Motor:
    2003 e46 m3 coupe
    Colour Combo:
    Lsb/Lsb
    This is what ive always suspected, there's only so much a bolt can do lol. I think my clunking is more the diff itself as fitting the bushes didn't really make it massively different. I'm just looking for a cheap way of making an improvement. I guess I'm going to have to spend some cash get my diff referbed. :thumbsup:
     
  7. 3 Dec 2017 at 10:15 PM #7
    DaveMSport

    DaveMSport Achieved official socks

    Joined:
    Aug 29, 2014
    Messages:
    1,818
    Likes Received:
    3
    Trophy Points:
    38
    Your Motor:
    E46 M3 Individual, E36 M3 track car, Landrover Defender E53 X5, E38 730, E30 318is, E30 Mtec touring
    Colour Combo:
    Techno Violet/silver gray
    I've the powerflex black diff bushes and don't have any clunking at all. At first the front diff mount came loose but that was due to the threads in the casing not being great so changed the diff and fitted new bolt and it's been perfect since and has done a 3k round trip to the 'Ring and three trackdays since then without any issues
     
  8. 4 Dec 2017 at 12:34 PM #8
    monkeyboy

    monkeyboy Achieved official socks

    Joined:
    Nov 12, 2013
    Messages:
    948
    Likes Received:
    4
    Trophy Points:
    18
    Location:
    Gatwick
    Your Motor:
    2004 E46 M3 vert manual Laguna Seca Blue
    Colour Combo:
    Laguna Seca blue, matching leather
    I did mine with power flex bushes not difference in noise at all, the oem bolts fit as well, never understood all the drama surrounding people saying it’s noisy, when it isn’t.
     
  9. 6 Dec 2017 at 4:34 PM #9
    schooner32

    schooner32 Achieved official socks

    Joined:
    Jan 4, 2011
    Messages:
    4,131
    Likes Received:
    2
    Trophy Points:
    38
    Location:
    Dublin
    Your Motor:
    2004 M3
    Colour Combo:
    silver grey/ black
    I dont know why anyone would fit poly diff bushes over the stock diff bushes. The stock bush quality is hands down better than the poly. If anyone has held a stock front diff bush in your hand you would be fairly impressed with its robustness and weight. Its more less solid steel.

    Oem diff bushes are very much under rated and I removed my diff poly diff bushes because they just are not as good as stock. I have black poly subframe fitted and very pleased with them.
     
  10. 6 Dec 2017 at 4:51 PM #10
    Rick M3

    Rick M3 Achieved official socks

    Joined:
    Apr 10, 2013
    Messages:
    8,205
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Preston
    Your Motor:
    2002 M3 Convertible
    The OEM bolts definitely don't fit, so I think you're talking about a different bush
     
  11. 7 Dec 2017 at 10:10 AM #11
    DaveMSport

    DaveMSport Achieved official socks

    Joined:
    Aug 29, 2014
    Messages:
    1,818
    Likes Received:
    3
    Trophy Points:
    38
    Your Motor:
    E46 M3 Individual, E36 M3 track car, Landrover Defender E53 X5, E38 730, E30 318is, E30 Mtec touring
    Colour Combo:
    Techno Violet/silver gray
    Yes probably thinking of the front bush.


    We're yours black or yellow powerflex diff bushes, Mark?
    Just as my black ones are pretty solid. Yellow ones have always been ****e. Even for as far back as E30s
     
  12. 7 Dec 2017 at 1:28 PM #12
    schooner32

    schooner32 Achieved official socks

    Joined:
    Jan 4, 2011
    Messages:
    4,131
    Likes Received:
    2
    Trophy Points:
    38
    Location:
    Dublin
    Your Motor:
    2004 M3
    Colour Combo:
    silver grey/ black
    They were black. When talking about the poly front bush at least. I would only have an OEM bush considering its build quality. It weighs like 600gr:muttley: and more solid than poly in my eyes
     

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice