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  • DMF or solid flywheel?

    From Dogous@21:1/5 to All on Tue Sep 14 13:48:39 2021
    2008 Golf 5 1.9tdi
    150K
    making a funny noise at idle
    DMF suspected

    Is replacing it urgent or could it be left for 20K miles?

    Is it worth paying extra for a DMF or would a cheaper solid flywheel be
    fine?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From steve robinson@21:1/5 to Dogous on Tue Sep 14 20:46:52 2021
    On Tue, 14 Sep 2021 13:48:39 +0100, Dogous <dogolog@mail.com> wrote:

    2008 Golf 5 1.9tdi
    150K
    making a funny noise at idle
    DMF suspected

    Is replacing it urgent or could it be left for 20K miles?

    Is it worth paying extra for a DMF or would a cheaper solid flywheel be
    fine?

    I would stick to the DMF engines not designed for a solid flywheel

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Fredxx@21:1/5 to steve robinson on Wed Sep 15 00:37:37 2021
    On 14/09/2021 20:46, steve robinson wrote:
    On Tue, 14 Sep 2021 13:48:39 +0100, Dogous <dogolog@mail.com> wrote:

    2008 Golf 5 1.9tdi
    150K
    making a funny noise at idle
    DMF suspected

    Is replacing it urgent or could it be left for 20K miles?

    Is it worth paying extra for a DMF or would a cheaper solid flywheel be
    fine?

    I would stick to the DMF engines not designed for a solid flywheel

    I concur. There are a few issues with a solid flywheel:

    1) Gearboxes are built to cost, and suffer from the power drive impulses
    from an engine with solid flywheel. DMFs smooth out drive from your 4 or
    so cylinders.

    2) The directly coupled flywheel in a DMF is lighter, and so crank
    vibration modes are higher in frequency. Using a solid flywheel,
    resonances will occur at lower engine revs and less likely to be
    absorbed, depending on the design of the DMF.

    My conclusion some time ago was to replace like with like.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dogous@21:1/5 to Fredxx on Sat Sep 25 13:34:40 2021
    On 15/09/2021 00:37, Fredxx wrote:
    On 14/09/2021 20:46, steve robinson wrote:
    On Tue, 14 Sep 2021 13:48:39 +0100, Dogous <dogolog@mail.com> wrote:

    2008 Golf 5 1.9tdi
    150K
    making a funny noise at idle
    DMF suspected

    Is replacing it urgent or could it be left for 20K miles?

    Is it worth paying extra for a DMF or would a cheaper solid flywheel be
    fine?

    I would stick to the DMF engines not designed for a solid flywheel

    I concur. There are a few issues with a solid flywheel:

    1) Gearboxes are built to cost, and suffer from the power drive impulses
    from an engine with solid flywheel. DMFs smooth out drive from your 4 or
    so cylinders.

    2) The directly coupled flywheel in a DMF is lighter, and so crank
    vibration modes are higher in frequency. Using a solid flywheel,
    resonances will occur at lower engine revs and less likely to be
    absorbed, depending on the design of the DMF.

    My conclusion some time ago was to replace like with like.


    Was looking at solid but intending to go with DMF now.
    Thanks to you both.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)