E92 m3 rod bearings

Discussion in 'E90 Saloon / E92 Coupe / E93 Convertible M3 (2008-2013)' started by Kirbster, Dec 20, 2017.

  1. 10 Jan 2018 at 10:20 AM #41
    Oldgitst

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    Do you think the cold start is supposed to help in this area ?

    ie, the engine revs higher to achieve a gear change on DCT's , therefore less engine load which i believe is bad for rod bearings ...???

    I maybe completely wrong just a thought, interesting to see the rates of wear on Manual e92's and cold start delete DCT ones....

    cheers
    og
     
  2. 10 Jan 2018 at 12:47 PM #42
    WinFreak

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    Don't think the cold start will have much of an effect, the revs are higher yes but with barely any load on the engine
     
  3. 10 Jan 2018 at 10:37 PM #43
    JBristow

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    As above, I went with OEM but with the WPC treatment, so technically this is a way to slightly improve an OEM bearing, a half way house if you like.

    I then decided also to stick to 10W60 but went with an ester based oil, this one, https://www.demon-tweeks.co.uk/motorsport/engine-oil/millers-oils-cfs-nanodrive-engine-oil-2 (Opie oils forum sponsor rates it)

    Given the WPC treatment puts tiny microscopic holes in the bearings and this oil sticks to those holes it seemed to me to be the ideal combo
     
  4. 11 Jan 2018 at 9:31 AM #44
    Oldgitst

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    that's what I mean, the cold start produces less load on the engine from cold .... ie, the cold start is actually doing something useful .....
     
  5. 11 Jan 2018 at 4:50 PM #45
    Helmsman

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    Who's delivering these OEM with coating mate?
     
  6. 11 Jan 2018 at 5:25 PM #46
    WinFreak

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    Ah yes I read your post wrong.. I think you’re right, it’s definitely takes more throttle now to get the car moving now my cold start has been removed
     
  7. 11 Jan 2018 at 9:02 PM #47
    Oldgitst

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    I've also noticed using the paddles trying to change up gear at lower revs than letting it change naturally when on cold start makes it far more reluctant to change , adding more substance in my mind that it's designed for a reason....the cold start is worth living with on dct boxes as the engine load remains smaller.... im probably completely wrong but even tho I hate the cold start on my 2.5 mod think I shall leave mine as is...
    Not sure if the same ethos can be applied to manual cars as not been in one on cold start lol....

    Cheers og
     
  8. 11 Jan 2018 at 11:16 PM #48
    JBristow

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    The more I read about WPC the more I believe it to be the right answer (if there was a question in the first place). This article is excellent, especially page 2, where it talks about maintaining a film of oil. www.motoiq.com/MagazineArticles/ID/17/Special-Treatment-Part-1-All-you-wanted-to-know-about-WPC.aspx

    One point, its not a bearing with a surface but a bearing with something removed, so for me I went this way as it wouldn't tighten clearance. I either got mine from CAAutomotive, Redish or these guys, https://europeanautosource.com/wpc-surface-treated-rod-bearings-bmw-e46-m3-e9x-m3-e60-m5.html

    I then had them installed at Redish who take more measurements than Pythagoras and send you various pictures and videos during the process.

    Bottom line, with this the oil and not revving until the oil hits 90C (Which my V2 wheel tells me) means no concerns at all about this "problem"
     
  9. 11 Jan 2018 at 11:17 PM #49
    JBristow

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    In response to Helmsman
     
  10. 11 Jan 2018 at 11:22 PM #50
    JBristow

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    P.S There is or was lead time of around 5 weeks when I went to EAS. For me that was a positive as it meant that the process is not easy I.E they really do come from Japan like the first article mentions:thumbsup:
     
  11. 12 Jan 2018 at 1:20 PM #51
    Helmsman

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    Cheers mate
     

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