Fuel line quick disconnect failure - K-Bikes.com - Excellence in Motion
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post #1 of 29 (permalink) Old Apr 17th, 2006, 12:57 pm Thread Starter
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Fuel line quick disconnect failure

I had the rather disconcerting experience last week of having the fuel line quick disconnect fitting on my 03 K12GT fail, soaking my leg with gas while sitting at a stoplight. Visions of the "Human Torch" from childhood comics flashed through my head.

Anyway, checking back through maintenance records I see that my dealer (Blue Moon - ATL) replaced the line back at the 12K service due to a recall by BMW, so I'm more than a bit surprised to see a failure after only 10K additional miles.

Now I am wondering whether any of the rest of you have experienced similar failures either pre- or post-recall exchanges. Also, I noted a comment from Bobwms in another thread (http://www.k-bikes.com/forums/showth...ight=fuel+line)
about carrying spare barbed connectors for those emergenicies when quick disconnects break. Again, I am curious about the frequency of of this type of failure. My guess is that spewing of gasoline on riders at high pressure is not a good thing, especially when hot engines are close by! :wtf

At least the beast still has 6 months of warranty, so roadside service will tow from Athens to Norcross. But now I'm stuck without a ride for 10 days of great weather.

Looking forward to hearing any feedback.

-Jeff

-Jeff
2003 K1200GT (Blue...of course!)

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post #2 of 29 (permalink) Old Apr 17th, 2006, 1:09 pm
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Just found a broken male end quick disconnect on my 2001 KRS while renewing the fuel line filter. The QD was cracked at the locking feature but not yet leaking. Only a few miles extra and I would have had your experience. The part was approx $16 and easy to replace. I relieved the stress on the new part and the other QD assembly with cable ties across the U-bends of the fuel lines. Glad neither of our experiences caused fires.
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post #3 of 29 (permalink) Old Apr 17th, 2006, 1:28 pm Thread Starter
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Okay, will answer my own question. As soon as I sent the last note this great little "Similar Threads" tool found two previous threads that my woefully inadequate keyword search missed.

Obviously, these plastic disconnects are a poor design, and after-market metal versions are a better answer as long-term replacements. See

http://www.omega.com/pdf/tubing/coup...t-lcseries.asp

(ala Bobmws -- Thanks!)

Sorry for consuming bandwidth unnecessarily.

-Jeff

-Jeff
2003 K1200GT (Blue...of course!)

I may not have gone where I intended to go, but I think I have ended up where I intended to be.
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post #4 of 29 (permalink) Old Apr 17th, 2006, 1:34 pm Thread Starter
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Definitely glad to hear you caught the problem before any flames did. Given the content of some threads I've come across since sending my first note, I'm a bit surprised there hasn't been more chatter about this problem. The potential for real harm to someone seems pretty high to me.

I also feel less guilty now about using bandwidth to discuss something that's had some previous, albeit limited, coverage.

-Jeff
2003 K1200GT (Blue...of course!)

I may not have gone where I intended to go, but I think I have ended up where I intended to be.
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post #5 of 29 (permalink) Old Apr 17th, 2006, 6:25 pm
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It would be interesting to know how the disconnect failed. The acetal body because it was squeezed into the tight space and under constant tension/vibration or the 'O' rings either not suitable for fuel or damaged by previous disconnect operations. Only a careful check of the damaged disconnects would give more clues as to what failed and why.



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post #6 of 29 (permalink) Old Apr 17th, 2006, 8:49 pm Thread Starter
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In my case it was definitely the acetal body -- cracked through and clean around at the base of the male plug. Had to be mainly heat and vibration -- hasn't been touched except whatever the service shop folks did at the 18K check. Thebill from my 12K service check says the recall maintenance was performed at that stage, but if I read the recall info correctly the correction mainly involved an O-ring replacement. Could be that someone in the shop wasn't careful during the replacement and stressed/bent the male end of the fitting. Otherwise, the acetal body has a weak design.

-Jeff
2003 K1200GT (Blue...of course!)

I may not have gone where I intended to go, but I think I have ended up where I intended to be.
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post #7 of 29 (permalink) Old Apr 17th, 2006, 10:42 pm
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I had the same problem, the plastic will crack.
I just put a solid brass connector in place of the plastic quick dissconnect.

Bazra
aka; The Flash
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post #8 of 29 (permalink) Old Apr 17th, 2006, 11:00 pm
 
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I don't see why you need a quick disconnect here. I would replace them with brass couplings with hose clamps. Just make sure the tank is about empty when you change the fuel filter. Better the spill a little gas during maintenance than have a QD fail on you in the middle of the desert. FYI, the RT guys have reported some failures of their quick disconnects IIRC. --Jerry
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post #9 of 29 (permalink) Old Apr 23rd, 2006, 2:44 pm
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I think plastic QDs should be replaced every 12 to 18K miles, right?
I already carry barbed couplers/clamps for an emergency fix, but like the idea of not making a royal mess every time tank comes off. Although that's not often; every 12K miles. I still prefer the QDs though.
Will check mine for stress, as somebody suggested being the possible culprit... and makes sense. Good day.
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post #10 of 29 (permalink) Old Apr 25th, 2006, 9:35 pm
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Quote:
Originally Posted by jeffdean
Obviously, these plastic disconnects are a poor design, and after-market metal versions are a better answer as long-term replacements. See...
Had placed an order a couple of weeks ago with Omega and just got mine today. Very nice.
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Black 2002 K1200RS - "The Beast" (over 100k miles)
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