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  1. #1
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    Help: E92 M3 Clutch Problem

    My friend and I were trying to remove the CDV on his M3 only to find out he didn't have a CDV. We put everything back together and can't get it to work right.



    We tried flushing it with the two person clutch pump method, but it didn't work. I wanted to try to oil can pump method, but we didn't have one available at Autozone or O'Reily's.

    We gave up and sent it to BMW who is saying he needs a new clutch because the clutch is blown apart. Of course, this sounds like utter bull$#@!.

    Thoughts?
    Last edited by nafoo; 07-09-2014 at 07:45 PM.
    2010 e92 M3 Jet Black | DCT | ESS Tuned | Akrapovic Slip-on | Challenge X-pipe | AFE Intake | 18" Volk TE37SL | KW V3 Coilovers | RPI Scoops | Under Drive Pulley

    2007 e92 Mont. Blue 335i | 6MT | COBB Tuned | Quaife 3.46 LSD | Helix FMIC | AA DPs | HKS Exhaust | DCI | Stett CP w/ Forged DVs | KWv2 Coilovers | UUC Sway Bars & SSK | HPF Stg 2 Clutch | HFS-4 | M3 Suspension Bits | DEFIVfab Diff Lockdown Kit | Stoptech Trophy BBK

  2. #2
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    2010 e92 M3 Jet Black | DCT | ESS Tuned | Akrapovic Slip-on | Challenge X-pipe | AFE Intake | 18" Volk TE37SL | KW V3 Coilovers | RPI Scoops | Under Drive Pulley

    2007 e92 Mont. Blue 335i | 6MT | COBB Tuned | Quaife 3.46 LSD | Helix FMIC | AA DPs | HKS Exhaust | DCI | Stett CP w/ Forged DVs | KWv2 Coilovers | UUC Sway Bars & SSK | HPF Stg 2 Clutch | HFS-4 | M3 Suspension Bits | DEFIVfab Diff Lockdown Kit | Stoptech Trophy BBK

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    2 out of 2 members liked this post. Yes Reputation No
    Air in clutch system. I don't know off top of my head if there's a special tool to bleed clutch slave cylinder. But pressure bleeding procedure is recommended for that.

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    Going to take like 30 minutes at least to bleed it out.
    Burger Motorsports
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    Moved to S65 V8.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

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    Click here to enlarge You took it THERE!?

    Tow it to the shop tomorrow, we'll get it sorted out Click here to enlarge
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  7. #7
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    Click here to enlarge Originally Posted by alex@ABRhouston Click here to enlarge
    Click here to enlarge You took it THERE!?

    Tow it to the shop tomorrow, we'll get it sorted out Click here to enlarge
    He thought he was still under maintenance since it is a 2011, but it ran out in June. So now they're trying to fk him.
    2010 e92 M3 Jet Black | DCT | ESS Tuned | Akrapovic Slip-on | Challenge X-pipe | AFE Intake | 18" Volk TE37SL | KW V3 Coilovers | RPI Scoops | Under Drive Pulley

    2007 e92 Mont. Blue 335i | 6MT | COBB Tuned | Quaife 3.46 LSD | Helix FMIC | AA DPs | HKS Exhaust | DCI | Stett CP w/ Forged DVs | KWv2 Coilovers | UUC Sway Bars & SSK | HPF Stg 2 Clutch | HFS-4 | M3 Suspension Bits | DEFIVfab Diff Lockdown Kit | Stoptech Trophy BBK

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    2 out of 2 members liked this post. Yes Reputation No
    I received a call saying that they found the slave cylinder fork to be collapsed inside the bell housing. This goes beyond my understanding of the typical car... does this really happen from brake fluid draining out of the clutch lines?

    I've been offered to extend the maintenance plan for about $3,500 bucks, which will cover the clutch and the normal stuff like the brakes. I honestly didn't think it would have to come to this. Click here to enlarge got a freaking wedding to pay for soon!

    What are your thoughts guys? Help!?

  9. #9
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    Click here to enlarge Originally Posted by masq Click here to enlarge
    I received a call saying that they found the slave cylinder fork to be collapsed inside the bell housing. This goes beyond my understanding of the typical car... does this really happen from brake fluid draining out of the clutch lines?
    If it was not bled correctly yes. It can have too much pressure to just push the fork out and break the slave cylinder, it will just be gushing brake fluid. I hope that didn't happen. You might have to pull out tranny and check the clutch for any brake fluid on PP/ clutch.
    @alex@ABRhouston
    Burger Motorsports
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    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

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    Can you help explain what it means to not bleed correctly?

  11. #11
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    Click here to enlarge Originally Posted by masq Click here to enlarge
    Can you help explain what it means to not bleed correctly?
    Hydraulic systems have a fluid reservoir and so you bleed off some of this fluid. Not sure if that is too concise of an explanation.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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    okay understood. If we overfilled the tank and tried to pump the clutch, it would have created enough pressure to break the slave cylinder?

  13. #13
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    Click here to enlarge Originally Posted by masq Click here to enlarge
    okay understood. If we overfilled the tank and tried to pump the clutch, it would have created enough pressure to break the slave cylinder?
    I'm not sure one of the guys more experienced with these clutches needs to answer but I'd say that is a reason why you would want to bleed it.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

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    sounds like a load of BS. The back of the master has a tiny compartment for the clutch reservoir. make sure thats filled, sometimes it takes you pushing it to the floor once, cracking the bleeder, closing it and then doing it once again just to get fluid down there. if you leave the bleeder open and just pump it, you will suck air back in through the bleeder valve and it will never bleed properly.

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    I think my understanding of how a hydraulic brake system works is messing with getting the full understanding of how hydraulic clutch systems work.

    If there's a whole lot of air in the lines, then the pedal will just simply have nothing to push up against. So that means the pedal would be moving freely, without engaging/disengaging the pressure plate from the clutch disk. The reason someone would bleed the lines would be to let the fluid run, until all the air pockets are displaced by fluid that is being filled from the fluid reservoir.

    This is where my misunderstanding comes in. How could a mechanical part of the transmission break, if the only thing that happened was for a bunch of air to get in to the system? How does the lack of hydraulic pressure cause additional pressure to be created against the pressure plate by the fork?

    Thanks guys for taking the time to educate me on this.

  16. #16
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    Best way to do it is just to pressure bleed it. Empty the reservoir for the clutch, and fill it up backwars from where it bleeds. You pump up cause air goes up. IF you do it this way, there is no more bleeding.

    Burger Motorsports
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  17. #17
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    just tow the damn thing to me!
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    Thanks Alex. Dude, it's nothing against you or your shop. Everything about what I've heard and seen of your work is top notch. But that 65-70 mile round trip to your shop is pretty tough. Click here to enlarge

    Thoughts of opening a second shop closer to inner-loop? Click here to enlarge

  19. #19
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    a few minute longer trip, or thousands from someone misdiagnosing your car.

    :shrugs:

    You know where I am.
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    I've been convincing him to move to Beltway 8 & i-10 area with no luck :-(

    Come on Alex, more business over here :-)

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    1 out of 1 members liked this post. Yes Reputation No
    Just want to revisit this thread to report that the problem has been fixed by the stealership.

    They bled the clutch. Click here to enlarge

  22. #22
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    Click here to enlarge Originally Posted by masq Click here to enlarge
    Just want to revisit this thread to report that the problem has been fixed by the stealership.

    They bled the clutch. Click here to enlarge
    Glad that was it and you got it fixed.
    Burger Motorsports
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    It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.

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