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Thread: '12 RT Valve Adjustment Inquiry

  1. #1
    Registered User liv2ride's Avatar
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    '12 RT Valve Adjustment Inquiry

    Hello fellow owners/enthusiasts.

    Yesterday I conducted the 12k mile service. When checking valve clearance I noted that all valves loosened since the 6k mile service, though some appeared to loosen quite a bit. Below you will find the comparison.

    6k Miles
    LEFT INTAKE
    Upper: .18
    Lower: .18

    LEFT EXHAUST
    Upper: .35
    Lower: .35

    RIGHT INTAKE
    Upper: .20
    Lower: .20

    RIGHT EXHAUST
    Upper: .36
    Lower: .36

    12k Miles
    LEFT INTAKE
    Upper: .24
    Lower: .22

    LEFT EXHAUST
    Upper: .39
    Lower: .41

    RIGHT INTAKE
    Upper: .22
    Lower: .21

    RIGHT EXHAUST
    Upper: .38
    Lower: .39

    Although only two are out of spec on the loose side I will adjust all, with larger shims, to bring more toward center of range.

    This being my first BMW I am looking for input on whether this appears normal. How much impact would engine temp have on these measurements? I ask because the 6k was conducted in a closed garage where the 12k was conducted in a car port where there was a steady breeze and cooler temp ~10 degrees Fahrenheit, cooler.

    Thanks in advance.

    Scot
    Last edited by liv2ride; 11-10-2013 at 05:00 PM. Reason: Adjust formatting.
    2012 R1200RT - Fluid Grey Metallic

  2. #2
    Registered User wvpc's Avatar
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    Similar results

    The motor temperature is supposed to be cold for the valve measurement. If there were a 10 degree F difference it shouldn't be an issue. There is a Excel (xlsx) file labeled Custom_shim_ spreadsheet. It is very helpful in determining your needs with regards to shim sizes, etc. Well worth looking at. Are you aware of it? For some reason I can't attach it but I am sure it is archived. If you cannot find it let me know.

    Your valve clearances are a bit looser than mine but the overall results are similar. I had to adjust the throttle side upper exhaust as it went out to .406 mm at 18K. When the next valve needs adjustment I'll do the full custom shim adjustment.
    12 R1200 RT
    83 R100 RT

  3. #3
    Registered User liv2ride's Avatar
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    Quote Originally Posted by wvpc View Post
    The motor temperature is supposed to be cold for the valve measurement. If there were a 10 degree F difference it shouldn't be an issue. There is a Excel (xlsx) file labeled Custom_shim_ spreadsheet. It is very helpful in determining your needs with regards to shim sizes, etc. Well worth looking at. Are you aware of it? For some reason I can't attach it but I am sure it is archived. If you cannot find it let me know.

    Your valve clearances are a bit looser than mine but the overall results are similar. I had to adjust the throttle side upper exhaust as it went out to .406 mm at 18K. When the next valve needs adjustment I'll do the full custom shim adjustment.
    Thanks for the feedback. No, I am not aware of a "custom" shim spreadsheet; you can e-mail it to me if it cannot be attached to the forum. I'll send my email address via PM.

    My plan is to obtain, already on order, the next largest size shim to bring all eight a little tighter.
    2012 R1200RT - Fluid Grey Metallic

  4. #4
    Registered User wvpc's Avatar
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    liv2ride

    PM sent.
    12 R1200 RT
    83 R100 RT

  5. #5
    Registered User wvpc's Avatar
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    Camhead valve shim spreadsheet

    I found this thread on the ADV forum via PhotoBiker. Very helpful for Camhead valve adjustments.



    http://www.advrider.com/forums/showthread.php?t=670668
    12 R1200 RT
    83 R100 RT

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