Quick Disconnects (again)
Moderator: Moderators
fuel line disconnect leaking
I had my bike serviced yesterday. When I got home from the 100 mile trip from the dealer, I noticed that fuel was leaking from one of the disconnects.
1. I thought they might have damaged the O ring. I replaced the O ring with a spare I had. It still leaks. (Note: the O ring I used as a replacement was several years old, but I kept it in a sealed plastic bag.) I ensured that I lubed the O ring before assembly. I also ensured that I depressed the disconnect before joining the two parts.
2. It does not leak when the disconnect is disconnected. It leaks only when I securely join the two ends together. The bike starts and runs just fine, so fuel is going through the connection. But when the engine is off I get still get drip ... drip ... drip
3. The clamps do not appear to be the source of the leak. It is the disconnect, and it only leaks when connected.
Any ideas on what the problem is? Maybe the disconnect itself is bad?
Thanks.
1. I thought they might have damaged the O ring. I replaced the O ring with a spare I had. It still leaks. (Note: the O ring I used as a replacement was several years old, but I kept it in a sealed plastic bag.) I ensured that I lubed the O ring before assembly. I also ensured that I depressed the disconnect before joining the two parts.
2. It does not leak when the disconnect is disconnected. It leaks only when I securely join the two ends together. The bike starts and runs just fine, so fuel is going through the connection. But when the engine is off I get still get drip ... drip ... drip
3. The clamps do not appear to be the source of the leak. It is the disconnect, and it only leaks when connected.
Any ideas on what the problem is? Maybe the disconnect itself is bad?
Thanks.
Bob
2002 Atlanta Blue
Lifetime Member #74
2002 Atlanta Blue
Lifetime Member #74
The OEM disconnects are made by Colder. I found a source for them that is cheaper than the dealer
http://www.mcmaster.com
Here is my order. It ships today.
Products
Line Quantity Part Number Description Unit Price Total Price � Ships
1 2
Each 5012K672 Acetal Quick-Disconnect Tube Coupling Socket for 5/16" Tube Id, 1/4" Coupler, Shut-Off Valve $6.90 $13.80 � today
2 2
Each 5012K712 Acetal Quick-Disconnect Tube Coupling Plug for 5/16" Tube Id, 1/4" Coupler, Shut-Off $6.78 $13.56 � today
3 1
Pack 9464K16 Viton O-Ring AS568A Dash Number 011, Packs of 100 (Same as 9464K342) $7.54 $7.54 � today
$41 including tax and shipping for both disconnects. BMW charges $16 for the socket, $13 for the plug, and $2 for one O ring.
I will also replace the clamps with fuel injector clamps. Is it 5/16" size?
For the future, I am going to replace the plastic disconnects with brass ones. I don't like the idea of plastic parts keeping the gas from saying hello to the hot engine.
http://www.mcmaster.com
Here is my order. It ships today.
Products
Line Quantity Part Number Description Unit Price Total Price � Ships
1 2
Each 5012K672 Acetal Quick-Disconnect Tube Coupling Socket for 5/16" Tube Id, 1/4" Coupler, Shut-Off Valve $6.90 $13.80 � today
2 2
Each 5012K712 Acetal Quick-Disconnect Tube Coupling Plug for 5/16" Tube Id, 1/4" Coupler, Shut-Off $6.78 $13.56 � today
3 1
Pack 9464K16 Viton O-Ring AS568A Dash Number 011, Packs of 100 (Same as 9464K342) $7.54 $7.54 � today
$41 including tax and shipping for both disconnects. BMW charges $16 for the socket, $13 for the plug, and $2 for one O ring.
I will also replace the clamps with fuel injector clamps. Is it 5/16" size?
For the future, I am going to replace the plastic disconnects with brass ones. I don't like the idea of plastic parts keeping the gas from saying hello to the hot engine.
Bob
2002 Atlanta Blue
Lifetime Member #74
2002 Atlanta Blue
Lifetime Member #74
RD-
This exact thing happened to mine. I think if you look real real close at the body of the fitting, you will notice a very fine hairline split.
My dealer tells me he's seen quite a few of these cheap plastic fittings fail.
I just bypassed the whole shootin match with a hunk of pipe and some hose clamps.
At the 12K service I'll pop for the stainless versions.
This exact thing happened to mine. I think if you look real real close at the body of the fitting, you will notice a very fine hairline split.
My dealer tells me he's seen quite a few of these cheap plastic fittings fail.
I just bypassed the whole shootin match with a hunk of pipe and some hose clamps.
At the 12K service I'll pop for the stainless versions.
I had a similar problem with the plastic fuel connectors. About 2000kls after the last (and final) dealer service I noticed a strong fuel smell after a ride. I found a leak at the connection - it was definitely the connector, not the clamps. Because I had previously read other posts about the type of connector fitted (thanks guys) I knew how to disconnect them without damaging them. I found a fine crack in the male connector. The dealer admitted that sometimes they do fracture them during disconnection and I reckon they must have flexed mine which allowed it to crack in time. But they wouldn't cough up the price of new fittings. I replaced them rather than getting into a fight with them over Aus$50.
Next time I will find a stronger alternative - but the dry-break idea is worthwhile retaining for safety.
Next time I will find a stronger alternative - but the dry-break idea is worthwhile retaining for safety.
Brass Fuel Line Connectors
These are the go! Solid brass and quite cheap. I have ordered a set, but follow this thread for all the info you need:
http://www.advrider.com/forums/showthre ... +connector
http://www.advrider.com/forums/showthre ... +connector
Argue your limitations and they are.
'05 Rockster
'05 Rockster
I plan to install the Omega ones in the future, but they are back ordered for a while.
http://www.omega.com/pdf/tubing/couplin ... series.asp
http://www.omega.com/pdf/tubing/couplin ... series.asp
Bob
2002 Atlanta Blue
Lifetime Member #74
2002 Atlanta Blue
Lifetime Member #74
Is there a replaceable O ring on these? There seemed to be some debate about these on the ADVRider forum. I did not read the whole thread.HiOSilver wrote:I just received these from Smallparts.com:
They look nice. Show us some pics when you get them installed.
Anyone else think that the fuel lines are too short, and the factory disconnects are too darn hard to get off? You have to somehow get the clamps off and pull the barbed connectors out without damaging the fuel lines. The whole disconnect set-up -- plastic disconnects, crimp-on clamps, and short fuel lines -- is not German engineering at its finest. Or maybe it is the triumph of bean counters over engineers.
Bob
2002 Atlanta Blue
Lifetime Member #74
2002 Atlanta Blue
Lifetime Member #74
What were those engineers thinking when they designed this piece of crap.rdsmith3 wrote: Anyone else think that the fuel lines are too short, and the factory disconnects are too darn hard to get off? You have to somehow get the clamps off and pull the barbed connectors out without damaging the fuel lines. The whole disconnect set-up -- plastic disconnects, crimp-on clamps, and short fuel lines -- is not German engineering at its finest. Or maybe it is the triumph of bean counters over engineers.
About 6 months ago, the clamps came loose, gasoline was jetting out of the hoses. I tightened them up and the leak stopped.
But yesterday when I started smelling gasoline I asumed it was the same problem again. I was only about 5 miles from home but sitting in stop-and-go traffic and 98 F temperature.
The plug of the quick disconnect had cracked and was pissing gasoline that was coming right down on the red hot pipe. I was so angry.
A piece of low quality plastic between the fuel line and a red hot pipe!!!! How can a bike this expensive run so much risk?
I called the dealer and asked if they have a repalcement. This is a dealer who won't stock up even a license plate light bulb. They said they have a lot of that quick disconnect in stock. Bad sign of course. The plug alone is $16.95. I asked if they have a better alternative, because if I replace that same piece with another one I am getting rid of the bike pronto.
Then I remembered this thread. Now I have a couple of brass disconnects in order from small parts.
Frankly, for the first time -ever- I am not feeling comfortable riding this bike. Now I know it can leave me stranded somewhere 100s of miles away from home. So, it can be costly and totally ruin a good time.
I used to take BMW as one of the best engineering around. Not anymore. I even think they are recless for leaving people run a risk of fire. Plus, I read all over the internet that dealers advise riders to have a spare quick diconnect because they can break. Oh give me a break.
Nobody is sure perfect, but she practiced tirelessly !
I love this bike, but the fuel disconnect design -- the whole package -- is really poor. The other big design fubar is the use of a conventional battery (in my 2002 model) that requires maintenance, but doing the maintenance requires you to remove the gas tank. And every time you remove the gas tank, you risk damaging the fragile fuel disconnects.
Bob
2002 Atlanta Blue
Lifetime Member #74
2002 Atlanta Blue
Lifetime Member #74
I really like the look of those brass QD's, I went to the link on ADVrider and there seems to be a problem with the "O" rings swelling. Making it impossible to reconnect them, once disconnected. Unless you have a couple days to let the "O" rings dry out and shrink back to normal size. The other options are pretty expensive, except some more plastic ones made for aircraft. I am of the mind to exclude plastic QD's, but thought perhaps if these are rated for aircraft, they should hold up pretty well. Anyone have any experience with these? http://www.wicksaircraft.com/catalog/pr ... index.html
Don
Don
2004 Ferro R1150R the stealthiest color
When everything's coming your way, you're in the wrong lane.
When everything's coming your way, you're in the wrong lane.
There seems to be no final verdict on that problem as some people report they do and others say they can disconnect and reconnect with no problem !owldaddy wrote:I went to the link on ADVrider and there seems to be a problem with the "O" rings swelling. Making it impossible to reconnect them, once disconnected.
Is that your impression, too, or is there something I am not reading ?
Nobody is sure perfect, but she practiced tirelessly !
I thought the same thing -- no final verdict. Also, it was unclear to me if you can replace the O rings, as you can with the cheap plastic disconnects.popgazer wrote:There seems to be no final verdict on that problem as some people report they do and others say they can disconnect and reconnect with no problem !owldaddy wrote:I went to the link on ADVrider and there seems to be a problem with the "O" rings swelling. Making it impossible to reconnect them, once disconnected.
Is that your impression, too, or is there something I am not reading ?
Bob
2002 Atlanta Blue
Lifetime Member #74
2002 Atlanta Blue
Lifetime Member #74