Dual mass flywheel may need replacing.

Discussion in '5 Series' started by Merc? No. BM!, Apr 7, 2016.

  1. Merc? No. BM!
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    Merc? No. BM! WARLORD Site Supporter

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    A proper diagnosis still needs to be made, but there is a chance my manual, 78k, 2009 E61 520d needs the flywheel replaced.

    Has anyone here had this done to their vehicle? Was it costly? Did you use OEM or other parts?

    Any experiences or knowledgeable facts highly appreciated.
     
  2. kleynie
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    kleynie WARLORD Site Supporter

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    What makes you think that? Vibration?
     
  3. Merc? No. BM!
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    Merc? No. BM! WARLORD Site Supporter

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    Yes. Albeit slight. No obvious noise apart from a little bit of low frequency 'humming' at certain speeds. The kind the car normally makes when driving at speed with two windows open (but less severe). If that makes sense...

    We've looked at other possible causes, like injector problems and even wheel balancing, although there is a hint of vibration when stationary, but all fine.
     
    Last edited: Apr 7, 2016
  4. kleynie
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    kleynie WARLORD Site Supporter

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    Do you have good quality tyres? I ask because I had a similar thing with my old 525d and it turned out to be tyre hum at low speeds, sounded like a wheel bearing on its way out. The tyres were cheap Chinese jobs that I changed to Avon ZZ3 which solved the problem.
     
  5. Merc? No. BM!
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    Merc? No. BM! WARLORD Site Supporter

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    I do remember when changing the tyres, about a year ago, the car feeling less smooth.
    Yes quite cheap tyres I confess. Not sure what brand or type but can have a look tomorrow.

    May it be possible that they get a lot worse over time?

    They couldn't cause the slight vib when stationary though, I'm sure.
     
  6. Mieke
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    Mieke WARLORD Site Supporter

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    Sounds like DM flywheel could be the cause. Also check out the engine / gearbox mountings for wear.
     
  7. markyboyt
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    markyboyt

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    An easy way to check if it's connected to engine/gearbox or the running gear is reproduce the noise then dip the clutch, the revs will drop and of the noise isn't affected it's more likely the running gear.
    A drone/hum sounds more tyres/bearing. More often than not its caused by the stepping on the edges of the tyre treads, if you run your hand around the edge of the tread does it feel like it grabs your hand?
     
  8. Shock
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    Shock

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    I had my F10 520 changed. DMF

    Changed to LUK parts both DMF and Clutch. Cost about £550 for both if I remember correctly, the mechanic I used before so charged me £200.
     
  9. Merc? No. BM!
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    At what mileage did you have it done? What were the symptoms?

    Was quoted similar LUK costs at my garage (little bit less, but more for labour).

    Apparently original BMW DMF and clutch are more than twice the price.

    What are the opinions here on LUK v BMW parts?
     
  10. Shock
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    Shock

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    LUK is the OEM for these DMF & Clutch from what I heard.

    Mine was reaching 90K, I had slippage at high revs so the clutch was going, when taken out the DMF had large play too.

    I think got the parts from carparts4less. May have been £450.
     
  11. Merc? No. BM!
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    Merc? No. BM! WARLORD Site Supporter

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    Around eight months and 7k miles later the symptoms have only grown worse.

    There is no noticeable slipping of the clutch, but the vibration has become all the more noticeable across all speeds.

    Looks like it's time to bite the bullet and have the engine stripped and the problem solved. Hopefully!
    Apparently the problem can only be properly diagnosed after the engine is stripped.

    Any further thoughts that I should consider?
     
  12. Spuffington
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    Spuffington Moderator WARLORD Site Supporter

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    ......buying that 5GT you've been after?! ;)
     
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  13. kleynie
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    kleynie WARLORD Site Supporter

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    Yes, there are some good ones around at present. Px the 520 touring and make it someone else's problem
     
  14. Merc? No. BM!
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    Yes guys, that's definitely a consideration. Wondering though how much the problem will affect the PX value.
     
  15. Mieke
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    Mieke WARLORD Site Supporter

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    FYI I had an LUK DM flywheel and clutch fitted to my Golf GTi. LUK was one of the approved manufacturers supplying OEM transmission parts to VW. They have a reputation for reliability in the trade.
     
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  16. snrbrtsn
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    snrbrtsn WARLORD Site Supporter

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    Not sure if it's worth going to the expense of a new car, as I'm sure it cain be changed for a fraction of the price!
    My old GT is sat sales prepped and looking rather good, good enough that I'd consider it myself
     
  17. Merc? No. BM!
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    Sure, financially it probably makes more sense to repair and keep, particularly in our situation where we'll be abroad (without the car) much if the time.

    On the other hand, I would ideally drive automatic and 6 pot 3 litre, features my current E61 lacks.

    Decision decisions...
     
  18. Spuffington
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    I wouldn't worry about it affecting the trade in value too much.

    In my (vast) experience of trading cars, only three out of the 15 we're ever testdriven as part of the valuation; the Z4 by a spotty teenage Skoda Salesman (go figure), the S2000 by a spotty, teenage Ford Salesman (ditto) and the first X5 because I was asking well over book value (and got it).

    If you're buying a BMW, they probably won't bother.
     
  19. Cotswold BMW
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    Cotswold BMW WARLORD Site Sponsor

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    Cheap (y)

    You should see the price of a genuine duel mass flywheel :cautious:
     
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  20. kleynie
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    kleynie WARLORD Site Supporter

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    Lifes too short, move on and go for a 530d GT, you know you want to
     
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