S65/S85 throttle actuators.

Discussion in 'E90 Saloon / E92 Coupe / E93 Convertible M3 (2008-2013)' started by alpina527, Jan 24, 2014.

  1. 18 Feb 2016 at 9:23 PM #261
    gsxr750k3

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    just an update when i had my throttle actuators repaired by ba reman it went into limp mode within an hour of them being fitted mid december last year. cleared the fault code and no problem at all since touch wood so thumbs up BA REMAN
     
  2. 28 Feb 2016 at 3:28 PM #262
    chromeless

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    Just had my actuators refurbed by brilliant guys (Jason and Ben) who've started http://www.rebuild.org.uk/ and so far so good...

    My e93 (at 47k) went into limp mode this week, but was completely undriveable having shut down bank 2 completely.

    Had a number of conversations back and forth with Jason by email and he was completely open and honest about what can and cannot be done. I guess many circumstances are different when these things go but here is mine;

    - Limp mode, and undriveable due to bank 2 completely shut down.

    - Fault reported (the main one, at least) related to bank 2 actuator failing to return after the ignition test.

    - Jason and Ben came out to me and removed the actuators - this is invaluable as I suspect by the time I'd have bought all the bits, tools etc. and then stood in the cold scratching my head for 5 hours I'd have been pretty cheesed off.

    - It was clear that bank one has been replaced at some point, I'd guess around 30k / 3 years ago around when I bought the car.

    - Bank 2 actuator was in a complete state - gears as bad or worse than the pictures I've seen, and at least one of the mosfets obviously blown ... smelled like the magic smoke that escapes when your hi-fi breaks.

    - Jason swapped the gears and the mosfets. Be under no illusion DIYers, that to do this properly is not trivial. I'm not bad with a soldering iron but would have found this time consuming. Jason has experience with surface mount soldering and it shows. Removing and fitting the gears correctly clearly benefits from experience too.

    - Actuators were refitted, gubbins refitted, codes cleared and ...

    So far so good. No faults reported, engine running like an S65 should.

    The guys were top notch to deal with, totally clear and up front about costs, and whilst I guess the refurb option is far from certain I didn't want to blindly start swapping these outrageously overpriced components without at least giving it a try. If you're happy to remove the actuators, having witnessed the refurb in my utility room I'd say that their price for this is very fair indeed.

    I searched the web and couldn't find any testimonials, but chatting with Jason put me at ease that he's genuine and knows what he's doing. If you're having actuator issues, and you want a mechanic to do the work (it looks diy-able, but no where near as fast as Ben can do it) and someone experienced in the refurb to come take the hassle away, I cannot recommend these guys enough.

    Happy to share any experiences if that helps anyone.
     
    Last edited: Feb 28, 2016
  3. 8 Mar 2016 at 9:15 AM #263
    MERLINV12

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    A question for those of you that have had Throttle Actuator failure.

    A question for those of you that have had Throttle Actuator failure.

    Looking back in hindsight, were there any symptoms that you would now say were early signs of failure, BEFORE the DSC, Tyre Pressure, Limp Mode, Bongs etc ???

    Maybe a delay in response followed by a sudden surge, holding back, erratic running (more than normal cold start).

    TIA.
     
  4. 8 Mar 2016 at 11:21 AM #264
    chromeless

    chromeless A mere Chipper

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    My prior warning was a very slight throttle surge, most noticeable when driving along with low-ish revs and constant throttle. i.e. higher gear, 1-2000 rpm I noticed a very slight occasional pulsing feeling like a slight ease off of the throttle.

    Having had a refurbed actuator subsequently fail now, the warning symptoms were a more extreme version of the above, and included a lumpy down change and reluctance to select 1st gear when coming to a stop (DCT box).
     
  5. 8 Mar 2016 at 11:27 AM #265
    alpina527

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    There are no early warning signs. Any sign of a problem and the idrive flags up an error list.

    It might happen once, then go away for maybe a month or two, then it comes back more frequently.

    Gears won't show much wear until 60k miles. Anything under that is usually down to the electrics.
     
  6. 8 Mar 2016 at 11:32 AM #266
    Barnzzz

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    Not sure what your point is regarding tell tale signs or symptoms. Not sure what difference it makes.

    If it goes it goes... Replace/refurb it. And if one morning you get a bit of a throttle blip...You're not going to go ahead and change both actuators just in case are you.... So pointless line of questioning haha
     
  7. 8 Mar 2016 at 12:03 PM #267
    MERLINV12

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    Thanks Ian, just the type of informed comment I was hoping for :thumbsup:
     
  8. 8 Mar 2016 at 12:13 PM #268
    MERLINV12

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    The idea was that if several owners had all noticed something that matches the problems I am experiencing, then I would know what to expect.

    As it is Ian's answer, has told me that what I am experiencing is not impending TA failure.
     
  9. 8 Mar 2016 at 12:17 PM #269
    Barnzzz

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    Code reader?
     
  10. 8 Mar 2016 at 12:23 PM #270
    Skinzii

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    Barnzz are yours still going strong m8?
     
  11. 8 Mar 2016 at 12:24 PM #271
    Barnzzz

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    Ye no probs yet, I'm at about 1500 miles I think. :)
     
  12. 8 Mar 2016 at 12:45 PM #272
    MERLINV12

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    No codes, but certainly not OK.
     
  13. 8 Mar 2016 at 12:47 PM #273
    Barnzzz

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    Are your symptoms a secret Haha? Or they just not for this thread?
     
  14. 8 Mar 2016 at 12:56 PM #274
    MERLINV12

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    Happy with Ian's comment (post#265), which indicates it's not TA's, so best not to go off-topic here.
     
  15. 8 Mar 2016 at 1:05 PM #275
    Belfastone

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    Hi, Whats involved in getting these repaired replaced, Ian can you provide me with prices etc?

    Cheers!
     
  16. 10 Mar 2016 at 12:48 PM #276
    johnybravo

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    nice work
     
  17. 11 Mar 2016 at 2:31 AM #277
    TheBanjo

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    Interesting that they dismiss brass, which is what Alpina527 uses in his reduction gear. I bought a pair from Alpina527 and they've been in the car now for over 10000km and all good.

    From the Rebuild site:

    "Be aware of cheap copies of 3D gears & Brass copies, The brass gear will eat away at other gears quickly and can jam if engine is hot in summer due to expanding metal. 3D printed copies don't align correctly and don't last! Always replace both sides at the same time."

    I can understand the 3D printing, but the gears I purchased from Alpina527 (delrin and brass) looked superbly built -- the Indy mechanic (and [ex?] BMW master tech) I paid to change the gears remarked on their high quality.

    However, I do like the fact they sell the mosfets for the electronics.
     
  18. 30 Mar 2016 at 11:36 AM #278
    bighead

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    I just had these guys reburbed 2 s/h actuators ...they did a good job , the boards were repaired and new gear set replaced but unfortunately one of the actuator motor was damage before i bought them of ebay .
    even though it was not his faults ...jason had offer me a solution to the damage motor.
    will be sending the actuators on my car for him to refurb as well :thumbsup:
     
  19. 2 Apr 2016 at 11:28 PM #279
    Barnzzz

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    Did you end up sleeping with either (or both) of them?
     
  20. 4 Apr 2016 at 6:43 PM #280
    M3Beast

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    Actuator nightmares

    I have an E92 M3 which went into limp mode in December. Took it to the dealer in Bristol who diagnosed it as the actuators and quoted me £3.5k for replacement of both as well as a new DME.

    Did some research and came across Jason and Ben's site rebuild.org. Car was driveable and made the journey from Bristol to Gravesend where they are based. Ben did a good job on the mechanical side and Jason did the refurb. He replaced the gears as well as the mosfets on the electronic board.

    Car started up fist time round without issue. Since then, fault appeared on Bank 2 again. Having seen how Ben removed the actuators first time round I attempted it and it isn't too difficult if you follow the various guides available. Sent the faulty one to Jason who re-pinned the gear on the shaft. I reinstalled the actuator and been fine and very smooth driving since.

    Top job! Beats the 3.5k dealer quote!
     

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