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Thread: tapping when hot

  1. #1
    bob1100rtc
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    tapping when hot

    My R1100RT has a tapping sound from the right side chain tensioner at times. The niose will come and go but more often that not is present. It usually starts after the temp hits 5 bars. I have replaced both tensioners, and shimmed the spring in the right tensioner. (this quieted the noise over all but it's still there just not as loud). I use Mobil 15-50 oil with a factory filter. No other noises in the engine. Any ideas????
    Thanks,
    Bob

  2. #2
    K Bikes Complex by Choice cjack's Avatar
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    Quote Originally Posted by Bob1100RTC View Post
    My R1100RT has a tapping sound from the right side chain tensioner at times. The niose will come and go but more often that not is present. It usually starts after the temp hits 5 bars. I have replaced both tensioners, and shimmed the spring in the right tensioner. (this quieted the noise over all but it's still there just not as loud). I use Mobil 15-50 oil with a factory filter. No other noises in the engine. Any ideas????
    Thanks,
    Bob
    Definitely the engine...not the throttle body?
    R1200GS LC Rallye
    Jack Hawley MOA and RA #224, KE9UW ("Chuck")

  3. #3
    bob1100rtc
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    Definately the tensioner. I used a stethascope to isolate the noise.

  4. #4
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    Hi Bob. I've been dealing with the same problem for months. I have 44k miles on my engine and change oil at 3k miles. I became aware of it when I hear the local police bikes and they are extremely quiet and abused beyond belief.

    This is what I have learned:

    1. I also use the Mobil 1 15w50 also. It has the lowest viscosity of any of the synthetics out there(17.1cP). I have not heard your bike but, my chain tap comes and goes at 5 bars. When my engine warms to 6 bars it gets quieter. My chain noise is virtually non-existant. I can send you links on the different oils I have looked at but, the Mobil 1 Vtwin(20w50) has a viscosity I think of 20.1cP and would deliver a bit more pressure at the tensioner.

    2. The work that seems to have helped my bike the most is closing the rocker arm clearances. My dealer at the 600 mile service left the clearances at .006in on the left and .025in on the right. BMW spec.s say they are to be set at the min. .002in and the allowable range is .002in to .016in. If you don't set the clearances to .002 you cannot get a good valve adjustment. If the clearance is too great you can push up on the rocker arm and the feeler gauge will literally fall out of the valve. You may know all of this and I apologize if you do.

    These are my guesses:

    1. You and I have loose main bearings which would reduce the amount of oil pressure at the tensioner.

    OR

    2. The rocker arms were not set up at the dealer correctly and the overhead cams were not as stable in the head as they should be. If the rocker clearances are right and the valves are correct the cam should be closer and more stable to where the oil enters the cam bearing. This would reflected in a higher oil pressure at the tensioner. AGAIN this is just a guess. But, I have seen some improvement since I closed my rocker arm clearance to .002in. and noise continues to get better. Since the tap is getting better SUGGESTS that the rocker arm surfaces need to "wear to mate" with the bearing cap. I have checked the rocker arm clearances after 6k miles and they increased. I'm thinking and hoping I have only to adjust the rocker arm clearnce one more time to get the quiet engine I want.

    What I have read and been told:

    1. Normal oil pressure on an r1150 engine warm and idling is around 20psi at the oil pressure sensor. I will be checking this next if things don't continue to improve.

    2. The oil pressure light on my bike is set to come on at 3.5psi.

    The reason I'm playing with this is I'm retired, bored, and anal to boot. It's a bad combo to have.

    Let me know if you are successful at fixing your problem. These are just my guesses. The rocker arm help and info came from BMWmick - thanks
    Mick.

    Dave Faria
    Austin, Tx

  5. #5
    Encumbered by employment BouncinBob's Avatar
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    Quote Originally Posted by Dave_Faria View Post
    2. The work that seems to have helped my bike the most is closing the rocker arm clearances.

    2. The rocker arms were not set up at the dealer correctly Let me know if you are successful at fixing your problem. These are just my guesses. The rocker arm help and info came from BMWmick - thanks
    Mick.

    Dave Faria
    Austin, Tx

    Sounds like you guys need to get some K bikes.
    Bouncin Bob Malehorn
    Treasurer - BMWMOA
    Mentor OH
    98 K12RS RIP
    02 K12RS
    03 R1150R Hers
    69 H1

  6. #6
    Slow & Easy
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    Sounds like you guys need to get some K bikes.
    __________________
    Bouncin Bob Malehorn
    Treasurer - BMWMOA
    Bowling Green & Mentor OH
    K12RS

    Just curious, does this mean you've had a lot of problems or no problems with your K bike???

    Dave Faria
    Austin, Tx

  7. #7
    K Bikes Complex by Choice cjack's Avatar
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    Quote Originally Posted by Dave_Faria View Post
    Sounds like you guys need to get some K bikes.
    __________________
    Bouncin Bob Malehorn
    Treasurer - BMWMOA
    Bowling Green & Mentor OH
    K12RS

    Just curious, does this mean you've had a lot of problems or no problems with your K bike???

    Dave Faria
    Austin, Tx
    I'm kind of into the new K transverse four K bikes. I haven't seen any issues to speak of, but they look easy to work on.
    R1200GS LC Rallye
    Jack Hawley MOA and RA #224, KE9UW ("Chuck")

  8. #8
    Encumbered by employment BouncinBob's Avatar
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    Quote Originally Posted by Dave_Faria View Post
    Just curious, does this mean you've had a lot of problems or no problems with your K bike???

    Dave Faria
    Austin, Tx
    It means I don't have rocker arms to mess around with adjusting. check the clearance on the bucket shims once every 60,000 miles, might find one or two just out of spec.

    The R bike doesn't get many miles, I tune it once a year in the sping.
    Bouncin Bob Malehorn
    Treasurer - BMWMOA
    Mentor OH
    98 K12RS RIP
    02 K12RS
    03 R1150R Hers
    69 H1

  9. #9
    jingdog
    Guest
    It only takes one.

  10. #10
    Jfixit
    Guest
    Is there a how to link on setting the rocker arm clearences on an 1150?

  11. #11
    bob1100rtc
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    Thanks for the info dave. I checked my records and it has been 4000 miles since my last oil change. I will change my oil this weekend and let you know the results. I previously has Royal purple in there and had no problems . But my local dealer stopped carrying it so I switched to the more readily accessable mobil. I'll post the results and we can compare notes.

  12. #12
    Slow & Easy
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    Bob I still like the Mobil1 15w50 but, here is some info from my file that may help you. The Royal Purple 20w50 you use to use had a viscosity of 19.79. Other oils in my list that might be available are Mobil 1 Vtwin 20w50(20.9), Amsoil MCV 20w50(20.04), and BMW 15w50(18.15). I listed the BMW oil even though it has a lower viscosity that your Royal Purple. The least expensive oil in my area was the Mobil1 Vtwin at Autozone.

    Good Luck
    Dave Faria
    Austin, Tx

  13. #13
    Have you tried better earplugs? That technique has solved numerous oilhead problems.

  14. #14
    Slow & Easy
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    Quote Originally Posted by JimMoore View Post
    Have you tried better earplugs? That technique has solved numerous oilhead problems.

    I think it's kinda cool to have a bike that's ALMOST as quiet as a Goldwing but, can run off and hide to throw rocks at most rice rockets don't you??

    Take Care
    Dave Faria
    Austin, Tx

  15. #15
    Quote Originally Posted by Dave_Faria View Post
    I think it's kinda cool to have a bike that's ALMOST as quiet as a Goldwing but, can run off and hide to throw rocks at most rice rockets don't you??
    Yep. Every time I ride one of my oilheads without earplugs I think the thing is coming apart underneath me. Put the earplugs back in and ahhh, silence.

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