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Thread: Dual Mass Fly Wheel symptoms???

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  1. Re: Dual Mass Fly Wheel symptoms??? 
    #21
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    Manual or DSG?
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  2. Re: Dual Mass Fly Wheel symptoms??? 
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    It's manual
    John.
     
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  3. Re: Dual Mass Fly Wheel symptoms??? 
    #23
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    Quick update- the inlet flap is completely seized and needs replacing- not sure if that would cause the problem...?

    John.
     
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  4. Re: Dual Mass Fly Wheel symptoms??? 
    #24
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    It would make a rattling DMF sound even worse.
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  5. Re: Dual Mass Fly Wheel symptoms??? 
    #25
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    I usually verify a duel mass clutch failure by trying to reverse up hill, usually a failing duel mass will cause the engine to stall when under load resulting in you needing to ride the clutch pedal to stop it stalling.
     
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  6. Re: Dual Mass Fly Wheel symptoms??? 
    #26
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    Quote Originally Posted by turboextreme View Post
    you needing to ride the clutch pedal to stop it stalling.
    Yep, that should finish it off.......
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  7. Re: Dual Mass Fly Wheel symptoms??? 
    #27
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    Quote Originally Posted by turboextreme View Post
    I usually verify a duel mass clutch failure by trying to reverse up hill, usually a failing duel mass will cause the engine to stall when under load resulting in you needing to ride the clutch pedal to stop it stalling.
    Ok but if the inlet flap/anti shudder valve is seized and not working, when you switch the engine off will that cause the shudder and because of the way it makes the engine act abnormally would it cause excessive strain on the dmf and in turn create a clunking noise? - even if it is in perfect condition?
     
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  8. Re: Dual Mass Fly Wheel symptoms??? 
    #28
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    No, even a brand new DMF will not rattle.
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  9. Re: Dual Mass Fly Wheel symptoms??? 
    #29
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    The ASV is self explanatory - when it's working it reduces shudder on shut down. When it's stuck open expect your b*lls to be shaken off when you stop the engine. Excess shudder / shaking can make a lot of things emit some strange noises. Had a DMF jam on a manual 2.0 CBDC a few months ago. Clutch bit at around 1cm from the floor, engine shook like it was on 3 cylinders, acceleration was non existent and fuel economy out the window. Had to drive it 60 miles to my garage on a busy Friday night at rush hour which took nearly 2 and a half hours. One of the worst driving experiences of my life and must have piffed off a lot of other drivers. Clutch was on the rivets, DMF scored then seized so had to be cut off. I found later that you can use a counter hold tool sometimes with a crank and flywheel lock to rotate the top plate back into position!
    Mad Mitch
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  10. Re: Dual Mass Fly Wheel symptoms??? 
    #30
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    Thanks for all the information- new asv unit being fitted on Wednesday so I will report back.
     
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