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New Viscous Fan Coupling

Discussion in 'Z3 Roadster & Coupé' started by Mint, Aug 13, 2019 at 9:32 PM.

  1. Mint

    Mint Zorg Expert (I)
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    We got stuck in some traffic a couple of weeks ago whilst on a cruise in the Cotswolds and she started to overheat:(. Nothing putting the heater and fan on couldn't cure but as it was absolutely pi**ing down the roof was up. We did start to cook. Then last week whilst having her MOT the tester had to switch her off as she overheated again:(.
    A quick bit of diagnosis proved the viscous fan coupling wasn't engaging, hence the overheating. I ordered a new Meyle one and fitted it today. Fairly easy job, got the coupling and fan off the water pump pulley easily enough but the three cap head socket screws holding the fan to the coupling fought back. However, 30mins with some penetrating fluid and a sharp tap seating the allen key and they gave in.

    IMG_01 (Copy).jpg IMG_02 (Copy).jpg IMG_03 (Copy).jpg


    She obviously needed a full road test and as the weather was on side a trip up the Peaks was in order...
    IMG_04 (Copy).jpg IMG_05 (Copy).jpg IMG_06 (Copy).jpg

    Finishing at Tissington in 'Herberts Fine English Tea Rooms' ;)

    She passed her road test with flying colours:thumbsup:
     
    #1 Mint, Aug 13, 2019 at 9:32 PM
    Last edited: Aug 13, 2019 at 11:08 PM
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  2. andyglym

    andyglym Shiny Dust Caps Make Your Zed Go Faster.
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    Close Call and good catch mate, had mine changed a few years ago as it was on its way out. Oh, nice road test :thumbsup:
     
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  3. buze

    buze Zorg Legend
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    I'm having mine changed as part of it's yearly visit to the garage. Bizarely, mine 'failed' the other way, it's stuck on all the time, so drives the fan even at idle. Never bothered me that much apart from the slight noise of hoovering when I accelerate :)
     
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  4. t-tony

    t-tony Zorg Expert (I)
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    He knows better than that Andy, road test is out the gate and turn right, next right, next right and next right and back. No need to go larking about in them thar hills !

    Tony.
     
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  5. Mint

    Mint Zorg Expert (I)
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    Spoilsport. If I turned right out of my drive I'd go round a loop and be back to my drive after about 5 mins;)
     
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  6. andyglym

    andyglym Shiny Dust Caps Make Your Zed Go Faster.
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    If I did that I'd rip my back box off on the first cattle grid, bottom out for a couple of hundred yards through the field track then finish it off on the next cattle grid. :arghh: left, left, left, left and left for me
     
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  7. gookah

    gookah Zorg Guru (IV)
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    they can be really vicious,
    those viscous fans can ;)
     
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  8. t-tony

    t-tony Zorg Expert (I)
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    Great minds and all that .................... ;) Mind you, I have lost some skin off my knuckles changing these in the past Pete.=))=))

    Tony.
     
  9. Mint

    Mint Zorg Expert (I)
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    Dont know what you mean Pete;):whistle:
     
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  10. gookah

    gookah Zorg Guru (IV)
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    did you mean Peat? :whistle: ;)
     
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  11. t-tony

    t-tony Zorg Expert (I)
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    On behalf of my mate Dave ................. T**T!! =))=))

    Tony.
     
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  12. Grumps

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    :D
     
  13. Synclare

    Synclare Zorg Guru (III)
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    I have a new Meyle one also. still in the bag, waiting for it to stop raining to get to Tony's to have it fitted. Arm not up to strength yet :( The coupling seems tight to turn on the mounting nut though. Mine appears to drive all the while causing fan roar. Could you confirm item No. as 314 115 2701 M0846? BMMotormec confirmed that as being the one for my 2.8 but invoice states it for a 5 series Can you stop it turning when engine running and cold?
     
  14. t-tony

    t-tony Zorg Expert (I)
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    You should be able to stop it running with a rolled up newspaper Adrian. Some brave people use their fingers although I don't recommend that method myself.

    Tony.
     
  15. Mint

    Mint Zorg Expert (I)
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    Adrian, I bought mine from bmwmotormec but I don't know the number you quoted as mine is for my 2.2, my item was #11527505302. However according to RealOEM mine is used on 3, 5, 7 series and X5 and Z3.
     
  16. Dino D

    Dino D Zorg Guru (IV)
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    Is it true @t-tony that these have to be stored the ‘right way’ up or else the fluid goes in the wrong places or something and new ones may be faulty because of it?
    I’ve had no luck with these and after two new ones it’s all binned, just use the electric fan only now (but don’t do track work)
     
  17. t-tony

    t-tony Zorg Expert (I)
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    I haven't heard that Dino and can't really see that it's true because they're most likely to be stored and shipped lying flat but spend their lives sitting vertical.

    Tony.
     
  18. Synclare

    Synclare Zorg Guru (III)
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    Yes that's the chappie, £53.99. Both my 2.0 litre engines spin freely,one about 10 revs before stopping the other about 4. The one that stops after 4 revs cannot be stopped once engine running. My 2.8 would turn a piece of 2x1 into kindling!! How many revs (cold) does your new coupling spin before stopping Dave? Clearly my 2.8 is overdriving.
     
  19. GZed

    GZed Dedicated Member
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    Mine too - is it anything to be worried about (apart from losing a few horsepower?)
     
  20. Mint

    Mint Zorg Expert (I)
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    The old one was very loose but the new one only spins about 1/4 revolution before stopping. Like your 2.8 I wouldn't fancy trying to stop it when the engine is running. It does make a lot more noise on start up than the old one but soon quietens down. Time will tell..

    I've just looked on the box the new one came in and it does have the Meyle #314 115 2701 MFC0045 as the code but also in small numbers underneath 1152 7505 302 which is the BMW code.