Cam chain noise

Discussion in 'Parallel Universe' started by rwcfrank01, Feb 11, 2020.

  1. rwcfrank01

    rwcfrank01 Adventurer

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    I’m in the market for a used F800GS and looked at one today. It was loaded with goodies like Matris fork inserts and Wilburs rear shock etc. when the owner fired it up from cold I heard the cam chain slap for about 2 seconds then the noise went away and the bike purred. Is this normal? 42,000 kilometers on the odo.
    #1
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  2. Strawdog

    Strawdog Strawdog

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    Normal mine has F800GS 85000 KM on current engine it all good
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  3. rwcfrank01

    rwcfrank01 Adventurer

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    Did it make the noise when new?
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  4. nonchuck

    nonchuck Adventurer

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    Mine did/does.
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  5. kaspilo

    kaspilo Been here awhile

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  6. adventuro

    adventuro Adventurer

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    My 2010 has done it since day one, hasn't gotten any worse, 36,000 miles later. Wife's 2017 700gs can set for a month and no rattle on start up. I think they redesigned the tensioner at some point.
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  7. bmwroadsterca

    bmwroadsterca RadioFlyer

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    As long as it goes quiet then there is no issue.
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  8. SnoDrtRider

    SnoDrtRider I've been lost here before...

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    My 2013 800 had the rattle at 20,000 miles when I got it. I got tired of hearing it plus every once in a while it made a rattle for a split second sitting at a stop so I decided it was time to do the manual tensioner as linked to previously rather than take a chance.
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  9. Strawdog

    Strawdog Strawdog

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    SnDrtRider what brand did you get ?
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  10. SnoDrtRider

    SnoDrtRider I've been lost here before...

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    The California Motor Works one linked to above by Kaspilo...
    When I did the install I pulled the cam cover and check the valve clearance while I was in there as well.
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  11. shuswap1

    shuswap1 Long timer

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    That's a great time to install the tensioner. I won't be doing the same, however, at a cost of $250 per bike(we have 2) in Cdn funds I can't justify that cost for a simple tensioner. I've installed them on other bikes but that is just a bit too much graft for me.
    I guess if you make it for a BMW and there are no competitors? Similar (most) tensioners are in the $US30-60 range, which is more palatable.
    Anybody know of alternative manufacturers?
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  12. SnoDrtRider

    SnoDrtRider I've been lost here before...

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    The thing is most of the tensioners on bikes that have tensioners available for $40-$60 have a problem that their tensioners lock and cannot collapse but in locking they put too much tension on and cause the chain to stretch.
    The BMW tensioners rely on oil pressure to keep them tight without applying too much pressure which is a good thing EXCEPT if you stall a bike on an uphill and for some reason you roll backwards with the clutch out the timing chain can easily jump a tooth without the oil pressure keeping the tensioner snug.

    When I bought mine a few years ago they were $170 (us)... I would rather spend $170 or even $250 to prevent a problem that could result in a repair bill in the thousands.
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  13. shuswap1

    shuswap1 Long timer

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    Can't argue with that, but I have never heard of that happening in over 50 years of wrenching my stuff. I am referring to tensioners that don't ratchet, are fully manual, which is the only type I have actually installed to date. It does take some care to get them just right during the initial install. So that's why I thought the perfect time to do this is while in there checking Valve clearances and can pay extra attention to the manual tensioner and get the tension set just as it should be.
    If I thought this would ward off a serious issue the tensioner would be changed, I just have never heard of this happening. There are other good reasons to change the tensioner....but I'd prefer a less costly option, given that I'd be looking at over $500 to do both our bikes.
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  14. dpike

    dpike BeeKeeper Supporter

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    there's a thread here somewhere where an inmate was machining the plunger with tighter tolerances to build pressure faster i think and had good luck with it iirc. i thought he was going to produce them.
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  15. SnoDrtRider

    SnoDrtRider I've been lost here before...

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    I think shimming the spring or a slightly heavier spring would work as well.
    I wonder if anyone has compared a new spring to a used one both free length and tension?
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  16. NCD

    NCD Dirty Hairy Supporter

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    I have. I replace my stock tensioner every 12-18K miles. The new spring is always about 1mm longer than the used one coming out. I have often considered shimming the spring with a 1mm washer of some sort but never found anything I felt confident using.
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  17. Shakey23

    Shakey23 Been here awhile

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    I have 96,000 miles on my 2013 800. It just makes noise. If it goes away it’s fine. I replaced my timing chain at 75,000 miles via the master link method posted on this site. It wasn’t difficult. While there I checked the valve clearance and they were still in spec. I change my oil every 5,000 miles. It’s a beast. Runs like a champ and I would highly recommend buying one! At 90,000 miles I took in on a 2,000 mile trip to Colorado and rode around on the alpine loop. I did have some cosmetic damage from dropping it but nothing that made me have to stop riding. I would recommend a GSA rather than the standard GS as they have a larger fuel tank. Going across New Mexico got a little hairy! Fuel stations are few and far between sometimes!
    #17
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  18. sieg

    sieg Wearing out tires......2 at a time, day after day. Supporter

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    Had or have 2, 700gs, 1, 650 twin gs, 1, 800 gs. They all did/do it. The highest mileage one at 85000 of course did it the worst. (Or best, the way I look at it.) I would not use a manual adjuster because the factory one confirms two thing at start up. 1, I have good oil pressure, 2, my cam chain tensioner is working.
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  19. Zoef zoef

    Zoef zoef Long timer

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    And not having the risk with a wrongly adjusted manual tensioner leading to too much wear.
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  20. rwcfrank01

    rwcfrank01 Adventurer

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    Just picked this up with 12000 kilometers, no cam chain noise, yet 60341815635__6E8E0182-1E26-4645-923F-762262C6D4F3.jpg
    #20