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Z3M S50 Vanos solenoid leaking

Discussion in 'Z3 M Roadster & Coupé' started by Z3Mroadster, Jun 15, 2019.

  1. Z3Mroadster

    Z3Mroadster Dedicated Member

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    Hello!

    I have a Z3M, S50 engine!

    My Vanos exhaust solenoid again leaking...I was replaced o-rings before 4500 km!I was again put Viton o-rings...One old o-ring(exhaust/ bigger) was bad !

    Should I put a thicker o-rings? And how much thicker?
    And is better silicone or viton?

    I mean factory nitrile is bad...

    And should I put silicon(or other) around the solenoid to not play?Or some shims?

    Thanks!
     
    #1 Z3Mroadster, Jun 15, 2019
    Last edited: Jun 15, 2019
  2. Pingu

    Pingu Zorg Guru (I)

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    No solenoid seals should leak after 4500km, even nitrile.

    Where did you get the viton seals from? The smaller o-ring is metric, the larger one is imperial (BS021).
     
  3. Z3Mroadster

    Z3Mroadster Dedicated Member

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    From UK ebay!
     
  4. Pingu

    Pingu Zorg Guru (I)

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    I'm very busy at the moment and away from home, but I used to sell the kits and almost definitely have some seals.

    http://www.porterbility.co.uk/vanos.htm

    Feel free to use the information, but I won't be able to sell you any seals for at least a month.
     
  5. Z3Mroadster

    Z3Mroadster Dedicated Member

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    Is the OEM o-rings from S62 the best way?
     
  6. Pingu

    Pingu Zorg Guru (I)

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    I don't know if the solenoids are the same, or if they are viton seals, so I can't advise on that.

    I use seals supplied by an o-ring manufacturer, and have to be bought in packs of 100. The only S62 parts that I have used are the diaphragm springs.
     
  7. Z3Mroadster

    Z3Mroadster Dedicated Member

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    I already have ordinary Viton o-rings!
    But leking...
     
  8. Pingu

    Pingu Zorg Guru (I)

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    According to RealOEM, the S62 seals are cheaper than the S50 ones, but the dimensions of the S62 seals are not shown.

    S50 Items 27 & 28

    S62 Items 3 & 4

    The S50 ones will be correct and should be good for 30,000 miles at least.