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Thread: How can I check the vanos pressure?

  1. #1
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    How can I check the vanos pressure?

    I want to check it, I know (OK?) that the right pressure is 100 bar (warm engine). What kind of pressure gauge I need? Where have I plug it? The 100bar pressure is at idle or accelerating? I noticed nothing of rattle with cold engine, and the DIS camshaft intake/exhaust angle measure are better with cold engine, is it possible that the pressure was higher with cold engine?

    Someone gave me 2 options: vanos filter cavity or over vanos filter, bleed screw.

    I thing that is not correct on vanos filter cavity because the vanos would be without filter?¿

    Thanks a lot!

  2. #2
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  3. #3
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    Quote Originally Posted by kovrol View Post
    Thanks!

    I see that the pressure is 105 bar, I have compared with other similar links too. Everythings 105 bar.

  4. #4
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    For anyone doing this, be really careful about the hose fittings you use and never stand in front of the gauge. 105 BAR (about 1,500 psi) is a lethal pressure if a fitting comes loose. I was pretty nervous when I did mine and spotted a slow leak.

  5. #5
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    Thanks for your advice.

    Did you adjust it at 105 or 100 bar?

    Yesterday I bought a gauge and hose with the fittings, the problem for the shopman was the fitting close to the vanos. I have not my car here, I know that the thread is M10 with 1 mm of picth, that is ok because I took him the original screw-filter. I worry the clearance to the nearest vanos cap. Could you take a picture or give me a drawing with measures of this fitting?

    Thanks a lot.
    Last edited by boxter; 06-11-2014 at 05:00 AM.

  6. #6
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    Hi, I think that all is ok finally. I filed the hose end nut, now the nut has exactly the same diameter than vanos screw-filter. I have put some washers to match the original length of the vanos threaded hole. This way I will have good sealing, I hope!
    Last edited by boxter; 06-12-2014 at 11:32 AM.

  7. #7
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    This morning I checked the vanos pressusure,I used a 90 degrees connector to do it better.I rebuild vanos 10 000km ago with beissan seals.the pressure at idle is 75 bar.The adjust nut was marked with paint,it had the original set up.I modified the lenght but the pressuse did not increased.When i accelerated the presure was 90.I adjusted it to 100 bar but temporally when the rpm increased.
    What happened?
    Last edited by boxter; 06-15-2014 at 06:51 AM.

  8. #8
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    The vanos pressure should be 100bar at idle, and also at higher rpm... When you blip the throttle rapidly it does shoot below 100bar, as the system uses some of this pressure to advance or retard the cams.
    Try to get another pressure regulator, your existing one seems faulty... Hope you come right!

  9. #9
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    Hi friend! Thanks!

    I have updated info: I desconnected the valve, The seal cone presented a notch wear, I had other used valve, the seal cone had too this wear but lighter. I cleaned with brake cleaning but I could not disassemble the dumper piston and seal plate (43 pag.)ttp://es.scribd.com/doc/91511075/6/Infinitely-variable-high-pressure-inlet-VANOS

    I assembled all with the "new" seal cone and the pressure was 100 bar during some minutes after to adjust the adjuster piston at 4.1mm more or less the factory length. After a while the pressure decreased a bit to 85 bar and when I tightened the adjuster piston the pressure at idle did not increased, if I accelerated the pressure reached 100 bar (at 4.1mm) or 110 bar (more tightening) promptly and only to reach 3500 rpm, more rpm did not produce more pressure increase. After to accelerate, at idle the pressure was 85 bar or less.
    I will try to get other pressure regulator or sand a little the seal cone to ensure the correct settle place. It could be that the seal cone did not settle correctly.

    There is other part, 41 pag. part 10 (non return valve), I don´t know where is it? Could it be failing?

    A person told me that the pressure acumulator( 8 part) is bad, but I think that is not logical reasoning.
    Last edited by boxter; 06-17-2014 at 11:28 AM.

  10. #10
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    Hey Boxster,

    What are your symptoms? You mention camshaft angles not being ok... Can you elaborate on the numbers? Best to take a pic of it in inpa and post it for us.

    With regards to the one way valve (part 10) as referred to by you:

    I had this fail on my vanos unit. It became evident after the beisansystems seal kit was done.
    It produced a "thumping" noise, and could be seen by the camshaft angles. Here's a video which shows what it was doing on my car :

    http://youtu.be/mJEZzFUbig4

    The one way valve is internal to the unit, and cannot be replaced!!!! Still being investigated though.

    i had to get another vanos unit to solve this, obviously with new seals as well...

    With regards to the vanos oil pressure. I have seen on a S50B32 having exactly 100 bar, at idle.
    I measured mine, with the new vanos unit yesterday, and got about 85 to 90 bar on idle. If you increase rpm, it gets to 100. I think it's ok like that.
    Last edited by 444YYY; 06-22-2014 at 02:34 PM.

  11. #11
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    Low pressure vanos oil tª 95-100ºc/bad seals beissans?

    Hi! Thanks!

    Yesterday changed my pressure limiting valve, I used other one with new seals and I did the test again, the pressure is 100 bar at idle with oil temp. 50ºC to 80ºC (oil), with 85-95ºC the presure decreased to 67 BAR!!

    I think that the pressure valve is ok, because with oil 50-80ºC , the pressure is ok.

    What happens?? the besissan seals have 7000km...

    I thought that the no return valve was picture number 39 and part 16:pressure valve.??
    http://es.scribd.com/doc/91511075/6/...re-inlet-VANOS

    Do you think that the pressure accumulator is failing?

    The pressure is constant, when I accelerate the pressure decreases 15 bar aprox.

    I do not know what can I do:

    1/Bad beissan seals?
    2/pressure Limiting valve? Between 50-80º C (oil), pressure 100-90 bar, with 90 bar I accelerate and the pressure increase one moment to 100 bar. But with 100-95º oil, the pressure is 65-70bar (cte) but if I accelerate the pressure does not increase.
    3/No return valve?? Is not this part that I thought?
    4/I use BMW CASTROL EDGE LL04 5w30, could someone check the pressure with this oil?

    Thanks
    Last edited by boxter; 06-23-2014 at 09:01 AM.

  12. #12
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    Ok, let's take this back.
    One step at a time

    1. Is yours a s50b30 or s50b32?

    2. Why do you want to measure the vanos pressure? What is the exact problem? Share proper in-depth details, take a video so we can understand the problem better.

    3. The one way valve is part of the vanos body. It is NOT a separate part with a part number. It cannot be removed and changed... Check Realoem.com for details - it's not even shown!

    http://realoem.com/bmw/showparts.do?...04&hg=11&fg=15

    4. My results with regards to pressures that I have mentioned were with 0w40 oil - Mobil 1.

    Thanks

  13. #13
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    1/S50B32
    2/I changed seals and I want to know if my vanos is 100%. I have slow response or lag with WOT, with fast throttle touch. I have 100bar with cold engine (50-70ºC oil temp) and warm engine low pressure (65 bar) no codes error.
    3/ I thing that it is item 10 and 16 respectivily, it is fitted downstream hight pressure:
    4/5w30 castrol edge bmw.
    5/Beissans told me it could be solenoids leakage..

    Last edited by boxter; 06-25-2014 at 03:14 AM.

  14. #14
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    If you have access to another set of solenoids... Try them...
    Otherwise it's probably the one way valve in the vanos unit...

  15. #15
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    I have resistance 3.5 ohm and I am going to clean with ultrasonic, do you know what solvent I must use? Gasoline?

  16. #16
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    It turned out somehow? I have the same problém

  17. #17
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    Quote Originally Posted by M3Power CZ View Post
    It turned out somehow? I have the same problém
    If you aren't holding 100bar pressure at warm idle you need to rebuild your vanos. There is no way around this..

  18. #18
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    Quote Originally Posted by JCooper View Post
    If you aren't holding 100bar pressure at warm idle you need to rebuild your vanos. There is no way around this..
    or the pressure regulator is not working anymore

  19. #19
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    Is this solved?

  20. #20
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    The low pressure improved replacing oil for 5w40
    Now I have 65 at idle with warm engine but over 900rpm 100bar.I finised the research.
    I would like to check seals beissan.Accumulator of pressure and feed valve 1112130854.Also clean solenoids.
    I think that some seal is bad.
    Beissan told me that it is impossible...but I want to check it
    Do you think that the accumulator botlle could be bad?
    Last edited by boxter; 04-20-2017 at 05:18 PM.

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