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Fuel Line Quick Disconnect Question

Posted: Sun Dec 18, 2011 2:43 am
by ebincia
I am aware of the issues concerning the BMW OEM quick disconnects. I replaced the plastic OEMs with metal quick disconnects and replaced all crimp connectors on my last three BMWs. Recently I acquired a 2003 K1200GT which has the OEM quick disconnects. The new metal quick disconnects are here on my workbench. However, I will not have time to put then on until January, 12 because I will be out of town. The possibility of a leak while I'm away concerns me.

My question: How much fuel will escape if one of the quick disconnects were to spring a leak while I'm away? My reasoning suggests that it would only leak until the pressure in the lines is exhausted which would be a minimal amount of fuel and not a major safety concern.

Thanks in advance for your input.
Ebincia

Re: Fuel Line Quick Disconnect Question

Posted: Sun Dec 18, 2011 9:36 am
by Buckster
I'm no expert on it, but I think most QD's fail when the bike is running probably due to the pressure created by the fuel pump. I wouldn't worry about.

Re: Fuel Line Quick Disconnect Question

Posted: Sun Dec 18, 2011 12:42 pm
by sweatmark
My question: How much fuel will escape if one of the quick disconnects were to spring a leak while I'm away? My reasoning suggests that it would only leak until the pressure in the lines is exhausted which would be a minimal amount of fuel and not a major safety concern.
Congrats on the new bike. There's a lot of motor in there!

I don't recall anyone experiencing any significant fuel loss/leak unless the quick-connect actually breaks (typically the male half) and separates a fuel line. That's what happened to me during one particular tank removal.

Your logic seems correct: if a slight leak should develop (unlikely in the absence of any mechanical stress), then fuel would leak until pressurized line equalizes with atmosphere. But since the fuel pump is not a positive displacement device, the line pressure will drop as soon as the pump is turned off, and residual line pressure should subsequently be very low.

Of course, the answer to any concerns is the following: you simply task me with the job of fuel line leak inspection and K-bike battery charging via test rides. I'll drop by during weekly business calls in Springfield. Glad to help!

Still have your R1150R? Or did you make a trade @ BMWOR?

Re: Fuel Line Quick Disconnect Question

Posted: Mon Dec 19, 2011 12:58 am
by ebincia
Thanks all for your advice.

Sweatmark,

Yes, I still have the "R"...will keep it another while. This is a relatively short trip only two weeks. I may take you up on the bike checking this summer. I'll zap you a PM when I get back...we need to do brew , or coffee early next year.

Re: Fuel Line Quick Disconnect Question

Posted: Sat Apr 07, 2012 3:51 am
by Airman
ebincia wrote:I am aware of the issues concerning the BMW OEM quick disconnects. I replaced the plastic OEMs with metal quick disconnects and replaced all crimp connectors on my last three BMWs. Recently I acquired a 2003 K1200GT which has the OEM quick disconnects. The new metal quick disconnects are here on my workbench. However, I will not have time to put then on until January, 12 because I will be out of town. The possibility of a leak while I'm away concerns me.

My question: How much fuel will escape if one of the quick disconnects were to spring a leak while I'm away? My reasoning suggests that it would only leak until the pressure in the lines is exhausted which would be a minimal amount of fuel and not a major safety concern.

Thanks in advance for your input.
Ebincia
I hadn't really thoought about this, but I use the old plastic connector to drain the tank. Just plug in it in and put the hose in the gas can. That leads me to believe that if the connector was broken a similar result would occur. I realize this is a pretty late reply, but those connectors seem to interest all BMW owners.