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Thread: Clutch? Need a little help.

  1. #1
    Join Date
    Sep 2005
    Posts
    122

    Default Clutch? Need a little help.

    Hey all. Ive got a supercharged 540 6 speed and its been doing some funny things that I would like to get some opinions on before I dive in and try to fix it. With the horsepower this car makes I ve always been a little concerned with how the clutch will hold up. The other thing is I dont really know whats in it. It had the akisil motor swap done in 2000 and I know it has a different fly wheel but I am unsure on the clutch......last ower not the best on documentaions of trans. Here is what the car is doing. When I start off from a dead stop it shakes a little as you are releasing the clutch. It just started doing this. Clutch pedal has to be pretty far out (farther than I think is normal) before it starts to catch and like I said it shakes a little as you are pulling off. Once your moving car drives just fine......no slipping. I can let out in first slow and then hammer it and it will pull like a monster. Ive got a bently at home I guess Ineed to dig through it but just wanted to get input from the board. Could it be a master cylinder?
    -Drew

  2. #2
    Join Date
    Sep 2004
    Location
    romania
    Posts
    267

    Default

    shaking whould probably be caused by the dual mass flyweel springs. if one breaks it will shake. The easy way to see if the clutch slips is drop it. If weels spin it's ok, if not it slips.

  3. #3
    Join Date
    Sep 2005
    Posts
    122

    Default

    So you are suggesting to dump the clutch and see if it catches enough to spin tires and if it does the clutch should be ok? and if its the flywheel spring you suggested? then what?

  4. #4
    Join Date
    Jul 2004
    Location
    New Haven, CT
    Posts
    178

    Default what to do next

    Well, the next step involves money, a lift and a good BMW guy who has specific knowlege of this clutch/flywheel system, not a job for a corner garage-type guy, IMHO.

    Good luck,

    John

  5. #5
    Join Date
    Dec 2003
    Location
    PA
    Posts
    5,403

    Default

    Dbals, same issue I am having on my supercharged car. Sometimes when letting the clutch engage from a stop, the first couple inches of clutch travel shake the car sort of... not really a shake, but more of a quick engage/disengage of the clutch right? I think it's the clutch burn up in certain points and so there's an uneven engaging surface. Thats my opinion - I too will be doing a clutch soon.

  6. #6
    Join Date
    Feb 2004
    Location
    Meridian, ID
    Posts
    371

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    Something tells me that the drive shaft flex disk might not like dumping the clutch even without the supercharger and the additional mega-horsepower. But that's just me....
    Mike Holbrook
    Meridian, Idaho
    1992 535im, 17", Euro M5 Throwing Stars 8's & 9's, FK-451 235/45s & 255/40s, M5 Sway Bars 25/20, Conforti chip, Lowes Ram Air, glass sunroof

  7. #7
    Join Date
    Sep 2005
    Posts
    122

    Default

    Quote Originally Posted by Jon K
    Dbals, same issue I am having on my supercharged car. Sometimes when letting the clutch engage from a stop, the first couple inches of clutch travel shake the car sort of... not really a shake, but more of a quick engage/disengage of the clutch right? I think it's the clutch burn up in certain points and so there's an uneven engaging surface. Thats my opinion - I too will be doing a clutch soon.
    Thanks Jon, that seems to make sense. Iam just going to baby it as long as I can, look at doing a clutch this summer if I can make it that long. Any one have any suggestions at to which one?

  8. #8
    Join Date
    Sep 2005
    Posts
    122

    Default

    Took the car in to have it looked at by a mechanic that I do trust and his input was that I had some oil leaking from the back of the motor, from the real main seal and his thoughts were it was passing along possibly into the clutch housing and getting on the disc.....I guess this seems posible. Add another thing that needs to be changed this summer.

  9. #9
    Join Date
    Jan 2004
    Location
    Nashville, TN
    Posts
    982

    Default

    If you get a lot of oil in the bellhousing - it can affect the operation of the dual mass system as well. As the internal pieces of hte flywheel get coated in out. UUC makes a stardard clutch/flywheel setup. Its not cheap - but its stronger than the oem and is a lighter unit.
    Derek A.
    90 535i 5 Speed - Style 5 17"

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