Another alternator hits the dust and not under warranty

Discussion in 'Parallel Universe' started by C5!, Jul 11, 2011.

  1. C5!

    C5! Been here awhile

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    here is the stator "rewired"
    supposedly with high temp wires and glass-type resin.
    we'll see what happens when installed

    Attached Files:

    #41
  2. LukasM

    LukasM Long timer

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    From what I have seen I would say the average life expectancy of the F-series stators is around 30-50k miles, with a few exceptions on either end (more seem to die earlier than survive longer).
    #42
  3. ragtoplvr

    ragtoplvr Long timer

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    Not to raise alarm but looking at your picture of the rewound stator, there is enough varnish that the space between the poles is filled.

    Harley Davidson used to attach the leads between the poles and fill the space with epoxy. I have seen 100's of Harley stators where the poles with the epoxy failed, from the extra insulation of the epoxy. The newest versions use a different lead attachment system.

    The purpose of the varnish or resin dip is to keep the wires from vibrating and failing. A thin coat does this just as well as a thick one. Where an alternator is exposed to water with road salt, like on cars, the thick dip is often better, Enclosed in a crankcase, water should not be an issue and I personally would prefer a thin Dip

    Now this is NOT a HD, so maybe it does not apply, It will be an interesting experiment.

    And I only know about HD

    Your stator may be fine, the wire used might be higher temp than BMW used, and the thick varnish may not be an issue. But if it fails again, opt for thinner varnish coat.

    Rod
    #43
  4. C5!

    C5! Been here awhile

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    Noooooooooooooooooooooooooooooo ! :eek1
    #44
  5. C5!

    C5! Been here awhile

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    Got the bike back from the dealer yesterday.
    Rode only about 5km back home and just by curiosity touched the alternator cover once parked, and couldn't even touch it so hot it was... would that be normal? Left the bike in the garage and came back an hour later and the cover was still hot. Obviously not as hot as initially but still... As in the past I never worried about the temperature of the alternator I never took notice of that and don't know if that is normal... but coming out of that experience, and about to start another 1000 km trip, I am a bit worried. Should I? on a "normal" bike, does the alterator cover gets as hot? and keep so long in dissipating the heat once stopped??
    #45
  6. JRWooden

    JRWooden Long timer

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    Now cut that out .... I got enough to worry about ... :lol3
    Since the stator runs at WOT all the time ... I'm not sure how the system could fail to make it run any harder?

    Is the right side substantially hotter than the right side?

    Break out the thermal imaging cameras! :wink:
    #46
  7. TheCowboy

    TheCowboy back in the saddle again

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    I just ran out and checked the temp of my alternator side vs the clutch side (after 45 minutes of shutdown) - the alternator side was considerbly warmer than the clutch side. So I would say it was normal. Since the exhaust pipe is so damn close that might have somthing to do with it. I am thinking of wrapping the exhaust pipe with some of that tape that the hotrodders use.

    TheCowboy
    #47
  8. JRWooden

    JRWooden Long timer

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    Cowboy ... that is a fine idea...
    Please report back if the improvement is dramatic...
    I don't see how it could hurt and keeping that heat away from the alternator can't be a bad thing........... :clap
    #48
  9. Crash-n-Skid

    Crash-n-Skid WileeeCoyote

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    I've been thinking about this one. Reading this thread has me thinking about it more.
    Argus BB-SBM12-PS Battery Bug Battery Monitor for Motorcycles and Power Sports

    http://www.amazon.com/Argus-BB-SBM12-PS-Battery-Monitor-Motorcycles/dp/B0029VY4G4/ref=pd_sbs_auto_2
    #49
  10. Gangplank

    Gangplank Advenchaintourer

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    I had one of those on my F650. I used it to track when the voltage was running low and could turn off or down my running lights & brights.

    Planning to put one on the F8GS.
    #50
  11. Gangplank

    Gangplank Advenchaintourer

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  12. itsatdm

    itsatdm Long timer

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    Touched my engine case at a fuel stop today. You could fry eggs on that thing. Do not know if it was internal heat from the rotor or external from the exhaust, but can't believe it is a good thing.

    My Polymar skid plate wraps around 1/2 the pipe and I wonder if it is contributing to the heat. Going to have to look into that.
    #52
  13. dbh

    dbh d00d

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    I'm following this thread with interest, as my rides often take me to remote locations where a charging system failure would be highly problematic. I keep an eye on my battery voltage.

    I have a Garmin 276c plugged into the GPS power plug near the battery and have configured 2 things on this unit.
    1. one of the fields displays the voltage
    2. one of the alarms is set to alert me to voltage falling below 12V

    Normally I glance down while riding and see 13.7V +/- 0.1V regardless of the electrical loads I typically use. Occasionally, 2 or 3 times/day, I will notice a low voltage alarm and see a voltage of around 10V lasting for a second or two. Since I'm using CAN-bus supplied power from that plug, I've been wondering if this brief voltage drop is just part of the normal operation of the bike. It's not just turning off the power, since that would show the GPS internal battery which is around 7V.

    Anyway, I thought I'd mention the GPS display and alarm capabilities in case others here have a Garmin hard-wired to their bike.
    --
    dbh
    #53
  14. Gangplank

    Gangplank Advenchaintourer

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    I wonder if this is available on the 60Csx? Just got one & waiting for it to arrive. Plan to hardwire it direct to the battery. Would be cool if it doubles as a battery monitor.

    I also have been wondering if the failures are related to running extra accessories and how they are wired. I just can't see how if the alternator fails during warranty period it isn't covered :huh
    #54
  15. JRWooden

    JRWooden Long timer

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    Could it be your radiator cooling fan kicking?
    That would probably temporarily drop the voltage down to that range as it came up to speed...
    #55
  16. Gangplank

    Gangplank Advenchaintourer

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    Totally agree. When I had the single light one noted above and would ride with the riding lights around town at a light, the fan would kick on and it would turn yellow or even red (discharging state) for a few moments. I'd click off the running lights and it would go to yellow and back to green really quickly.
    #56
  17. dbh

    dbh d00d

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    That certainly fits with the symptoms and is something easily tested by toggling the fan and watching the voltage.
    However, when I noticed it on the road, I was riding at highway speeds on a relatively cool day and I would be surprised if the fan kicked on at all since even idling on a hot day takes several minutes to activate the fan.

    Now the geek side of me wants to put a little indicator lamp on the fan circuit. :D
    --
    dbh
    #57
  18. Midnullarbor

    Midnullarbor Been here awhile

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    A klutzy question - do the stock instruments give any warning or indication that the electrical power generation system has suddenly "gone fishing"? Or do you simply find out, a few hours later, when the flat battery shuts everything down?

    That LED voltmeter is sounding a better and better idea.
    #58
  19. Olvi

    Olvi Ice Butt

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    Can this be a cooling problem? Since the stator seems to "burn", for me it indicates that heat dissipation is not adequate. Then that falls down to oil cooler and oil quality. If the cooler and/or alternator cover is cover by s*hit, cooling will suffer heavily. If the cooling capacity is designed to clean surfaces then - according to idea of dual purpose bike - there is a huge design flaw.

    Yet, this can be also a poor quality of stock alternator workmanship - you know - the cheapest offer syndrome i.e. designed and manufactured by economist.

    A was about to install a carbon protector on the alternator cover (since it was close to crack on one hit) but reading this topic gave me a second thought. Well, if a put some heat transfer paste between the cover and "cover"...:rofl

    For me this sounds like I'm about to install toothbrush as a standard equipment on my bike and clean oil cooler after every trail or dirt ride. You know, BMW should place toothbrush to tools under the seat to clean the oil cooler daily...
    #59
  20. C5!

    C5! Been here awhile

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    the only good news, I haven' been caught off guard this time!!.
    I was indeed in the middle of nowhere when the Voltage monitoring Led I had installed started to go from green to flashing yellow and flashing red.
    I disconnected the headlamp, turned around and rode 100 and some km to the nearest city where the computer went blank right in front of a garage...

    Right now handed the stator to the guy who did the rebuilt this morning and he told me he'll investigate what happened.

    Attached Files:

    #60