Z3M S50 Vanos solenoid leaking

[Z3Mroadster]

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!

 

[Pingu]

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).

 

[Z3Mroadster]

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).

From UK ebay!

 

[Pingu]

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.

 

[Z3Mroadster]

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.

Is the OEM o-rings from S62 the best way?

 

[Pingu]

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.

 

[Z3Mroadster]

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.

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

 

[Pingu]

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.