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Disco 2 DMF vibration

Discussion in 'Land Rover Discovery' started by Kztom, Sep 24, 2020.

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  1. Kztom

    Kztom New Member

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    Hi all, first post :D

    Bought a 140k disco 2, pre face-lift a month or so ago, paid 1k for it, and to be fair.. he saw me coming, but with rose tinted specs on, I was never going to not buy it.

    HGV mechanic by trade, so not scared of doing the work needed to get her right. She obviously had a 'magic MOT'.

    Within the few months I've had it I've had to replace the ;

    Pwr steering pump,
    All 4 tyres,
    All brake pads,
    All Discs,
    Watts linkage bushes,
    Rear crank seal.

    I even had to put a new (good second hand) gearbox in, as she crunched in first and second, and the big peice of syncro which came out the drain plug during oil change confirmed the worst.

    Anyway, babble over.. during the gearbox swap, I stuck a new clutch in, as even the slightest touch on the pedal started to slip.. turned out it was the slave rod which had broken, thus not giving me enough travel.. oh well. Still put the new clutch in when the box was out. The spigot bearing was in peices in the bellhousing, and the hole in the crank for it was now egg-shaped and wouldn't even hold a new one :mad: bit of a bodge but my only option at the time was to centre and bond the spigot bearing into the crank.. while there and the DMF removed, I checked the wear, and to be fair it was within spec. It had a few hot spots but nothing to get worried about. But I did notice a bit of outward motion (you could almost rock the fluwheel plate towards you so far).. never even seeing a DMF before (bear in mind, hgv's don't have them, and I rarely touch cars ) I presumed this was normal and put her all back together.

    All is well, aside from the horrible graunchy noise at about 3k revs, its louder while driving, but is still there when stationary, in gear or in neutral. So not a drive train issue.
    The clutch pedal vibrates somewhat as usual but goes berserk at those revs, leading me to belive ive dropled a bollock by not replacing the flywheel when I did the clutch.

    :mad::mad::mad:

    Sorry for the wall of text, but has anybody driven with a worn out DMF and are my symptoms the same?

    Cheers :D
     
  2. Kztom

    Kztom New Member

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    If anyone wants to see the bonded spigot, people usually do when i told them how much of a bodge it was :D:D I'm not sure if to be proud, or ashamed. Ha ha

    Here it is, not a very good photo.. but the stuff its bonded in with is good stuff, we use it for bonding bosses in filter housings at work. Saved buying a fitting a new crank.. for now
     

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    Last edited: Sep 25, 2020
  3. jamesmartin

    jamesmartin Well-Known Member

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    with dmf vibration and knock especially at idle are common,spigot bushes are often to tight hence noise and wear, but to wear the crank hole would suggest something ie the flywheel isnt running true
     
  4. Kztom

    Kztom New Member

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    Cant see the flywheel not running true, as the outer of the crank hole was fine, so the flywheel is perfectly centred, maybe the spigot not true, but there isn't any knocking from the DMF, and the engine is smooth as, all the way upto 3k. Then it just gets very loud and vibrates its balls off.
     
  5. jamesmartin

    jamesmartin Well-Known Member

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    1 part of the fly wheel that bolts to the crank is solid and will be centered the dual sprung part clutch bolts to may not be, id have changed it after seeing all that rusty dust, it shows metal is wearing, unlike normal clutch dust youd expect to find
     
  6. Kztom

    Kztom New Member

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    I get you now, yeah the main body is ofcourse centred. The dual 'section if you like, had that outwards play.. so I'm guessing now its goosed,

    The dust, the picture overexadurates the colour. It wasn't unlike any other clutch ive changed.
     
  7. jamesmartin

    jamesmartin Well-Known Member

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    its standard practice to change the dmf with the clutch
     
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