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SV6 EXEDY CLUTCH FAILURE

Discussion in 'V6 Development And Modification' started by VEZ LFX V6, Apr 27, 2017.

  1. VEZ LFX V6

    VEZ LFX V6 New Member

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    IMG_5657.JPG IMG_5677.PNG I'm just throwing it out there about EXEDY clutches and how piss weak they are and how they don't back there own warranty.
    My EXEDY Heavy Duty Sports Tuff Clutch SMF conversion for my 2012 Holden ute 3.6L SIDI that I paid $1,200 for has failed in a big way with less then 20,000KM on it (6 months old), while my Girl friend was driving it went to over take a car when it went bang and smash pulled over on the side of the road, got towed to the nearest town($600), put it on a hoist and the clutch plate had failed and destroyed the gearbox($2,200) (fully separated it for the engine block) so after sending it back because we were 1,000km from home, after 5 nights accomodation ($550) and a hire car for 4 days ($240) they found every way to get out of it. Just letting everyone know how rubbish of a product they build, and if use are thinking of modifying your sv6 these clutchs are not worth it I would recommend buying a monsterclutch or Ram 9.5 from the USA.
     
  2. immortality

    immortality Can't live without smoky bacon! Staff Member

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    Epic fail.

    Amazing how the pressure plate has thrown off center and started to cut through the bellhousing.

    Sucks to be you :(
     
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  3. VEZ LFX V6

    VEZ LFX V6 New Member

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    Yeah it has gave up the ghost in a big way, wouldn't ever buy another exedy that's for shore, haha does abit expensive exercise
     
  4. immortality

    immortality Can't live without smoky bacon! Staff Member

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    Were there any strange vibrations before the failure?

    Who fitted the clutch?

    What sort of bolts were used for the clutch pressure plate (grade) and what torque setting was used?

    Taking a 2nd look at the clutch pressure plate you can see the whole unit has shifted on the flywheel and can clearly see where the holes for the locating pins have elongated. TBH in my opinion that looks like a fastener failure. The clutch drive plate still looks centered where the gearbox input shaft would have been holding it. Thank **** the input shaft didn't fail or it could have been a whole lot worse.

    Do you have any pics of the driven plate?

    Do you mind me asking what sort of power the engine makes and what sort of RPM you turn it too?
     
  5. VEZ LFX V6

    VEZ LFX V6 New Member

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    It wasn't so much of a vibration but you could feel a little difference through the pedal from new but didn't think much of it as it was getting more KM on it, was 250RWHP but since then have fitted MACE CAMS, the limiter was 7,200, have lifted it to 8,000 since cams but has not seen that yet, wanted to see what it did on the dyno first so I wasn't stressing it for no reason, the bolts were supplied with the clutch as the torque I can not remember but they were all brought in together then torqued in a star pattern as well as double checked, all parts were brakleened and scrapped the pink paint off where the bolts mate upto the pressure plate.
     
  6. immortality

    immortality Can't live without smoky bacon! Staff Member

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    Did you get the clutch and flywheel balanced as a unit?

    TBH those bolts used to fasten the clutch plate look like your basic high tensile bolt which are fine for a stock application but I'd spend a little more and use better quality bolts.

    This actually reminds me of a story in the NZ Performance car magazine many many years ago, some guy in a RX7 had a clutch failure whilst doing burnouts at some national event been held at Meremere raceway. Anyway, long story short the whole clutch parted company at full song (upward of 8000rpm if I remember correctly) and destroyed fairly much the whole car. Pics of the flywheel showed where the clutch plate fasteners had sheared off. The owner complained because he had used brand new grade 8.8 fasteners....
     
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  7. VEZ LFX V6

    VEZ LFX V6 New Member

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    I am pretty shore that they are balanced already from exedy, yes I should have done abit more research on that but these guys are "pros" at what they do thought they would know but there not that good so, I'll out source to USA I believe
     
  8. crew_man

    crew_man Active Member

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    When they declined responsibility, what was their reasoning exactly?

    Did you or your mechanic organise for an independent analysis to determine the cause of the issue?

    If you can prove that it was an issue with the product rather than fitter error you could always take them to small claims court or the ACCC to remedy the situation
     
  9. VEZ LFX V6

    VEZ LFX V6 New Member

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    They pretty much says:
    1. that the clutch has been slipping due to excessive grease on spline.
    2. Elongated most likely caused buy incorrect torque.
    The final conclusion was they reckon the bolts became loss and had moved the pressure plate away from flywheel.
    So let's say that explains the elongated holes, and maybe the hot spots (but note that the grease provides and correct amount was used as spec from exedy and correct torque was used in a star pattern and the matting surfaces was paint free)
    But doesn't explain why the diaphragm fingers were bent and why the pressure plate straps gave way? Now this is there strongest clutch they build no V6 should have ever been able the make this clutch into mince meet like it did
     
  10. immortality

    immortality Can't live without smoky bacon! Staff Member

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    Clearly things got hot. Once the pressure plate was running off center the whole assembly will be out of balance and centrifugal force will want to keep pushing it further out. Once it started......

    Next time loctite the pressure plate bolts and have the who assembly balances as a unit.
     
  11. crew_man

    crew_man Active Member

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    Have you had it independently assessed by an expert and been given a report on their findings?

    I work in the automotive aftermarket and their response seems fair enough based on the images alone. The clutch would need to be properly assessed to determine if it was an issue with the product, as it seems to be fitter error at this stage.
     
  12. VEZ LFX V6

    VEZ LFX V6 New Member

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    How is it fitter error why parts have been fitted measured and torque as per exedy specs provided?
    I fitted it as I'm a Heavy Desiel fitter and do this for a living and if it was fitted incorrectly it wouldn't have lasted this long if it had oil/grease of friction plate because I would have pulled it out if it slipped at all, and if it had loss bolts it would have let go along time ago, no I have not had it looked at but anyone else, over wasting money now I'll buy a momsterclutch from the states was putting it up so if anyone else was thinking exedy and modified don't think exedy go else were.
     
  13. crew_man

    crew_man Active Member

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    I understand what you're saying, and i'm not saying that you're wrong and that it wasn't a product failure, however it is important to prove that a product failed before slandering them online.

    Unfortunately the Automotive industry is one where the blame is constantly being shifted (just ask any mechanic if they've ever made a mistake - they'll tell you that EVERY issue that they've ever had with a customers vehicle was due to a dodgy product), this is why manufacturers are reluctant with warranties as they will need to be sure that it was genuinely a product failure before handing out cash.

    As I said earlier, I work in the automotive aftermarket and see warranty claims all the time where 90% of the time it is proved beyond a doubt that failure was due to fitter error, despite the mechanic believing that they know everything and did everything right.

    An example of this is when fitting new radiators - A radiator may fail so they are tasked with replacing it, only for the new radiator to fail shortly after, which the mechanic will claim as product failure. It generally turns out that they didn't flush the heater circuit or there is stray current that they didn't even check for and was part of the cause of the customers original failure. Had they gone through the proper testing and flushing processes there would have been no issue, which is why it is fitter error.

    The cost to prove that it was a product failure shouldn't be an issue, as that is what will allow you to recoup the far larger costs associated with the failed product. You might need to spend an additional $100 for testing, but once that's done you can recoup the cost of the clutch AND testing, as well as possibly the other costs that you incurred.

    If you are positive that it is a product error rather than fitter error, then it should be a no-brainer to take it further and get a large portion of your money back rather than copping it on the chin. I'd even send the clutch assembly back to Exedy (which will cost f-all) for their assessment, rather than doing nothing.
     
  14. VEZ LFX V6

    VEZ LFX V6 New Member

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    and I know what you are saying as well, that's why I work on my own car and always have a procedure from the Manufacturer them self including toque spec and sequence, I don't think the pressure plate bolts were a hi enough grade and had to low of a torque spec, and the pressure plate straps were to weak for what exedy says that the clutch can be used for.
     
  15. crew_man

    crew_man Active Member

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    Then that seems like an ACCC issue, given that the product was not of reasonable quality
     
  16. immortality

    immortality Can't live without smoky bacon! Staff Member

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    That's why I asked about balance and if there was any noticeable vibration since install. Dead giveaway really.
     
  17. VEZ LFX V6

    VEZ LFX V6 New Member

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    I might look into it and get it looked at, but that's not the first exedy that's failed my dad had one in he's 4wd drive and done 40,000km and feel apart InTown, but on another note Mantic make a killer kit SMF twin plate ceramic 9000 series with sprung centre
     
  18. harrop.senator

    harrop.senator Well-Known Member

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    I've never had an issue with exedy ones myself. And the bolts are definitely not high torque its usually only around 30nm for pressure plate bolts. Got a ceramic exedy in a car that see's 9k and not had the issue. Is a very extreme let go with whats happened and definitely looks like the pressure plates walked. Whats made it walk I'm unsure of though. With how many bolts are on a cover plate and how close they are and the fact theyre doweled they shouldn't really need a stupid amount of torque or 12.9 bolts in my opinion..

    Hopefully the new clutch box flywheel set up lasts a little bit longer!
     
  19. VEZ LFX V6

    VEZ LFX V6 New Member

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    Yes I know that the mantic clutch I just put in its pressure plate cover was only like 33 NM but I am getting someone to look at it soon as I'm still not happy with them, if I ever spun that exedy to even 8K let alone 9K I reckon it would have turned its self inside out maybe even ended up in the car with me
     
  20. crew_man

    crew_man Active Member

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    When visually looking at the clutch before/after the failure is there a visible quality issue?

    Eg. does the construction look sub-par, alignment issues, free-play etc.?

    Also, are there any other apparent quality issues since it failed, such as cracks or discolouration?
     

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