Roll over Valve Hose Hazard!!! - BMW Luxury Touring Community
 
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post #1 of 10 Old Aug 19th, 2008, 1:01 am Thread Starter
 
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Roll over Valve Hose Hazard!!!

I have had several incidents of over pressure venting when removing the gas cap. On occasions even felt the tank shape change when the cap was removed. This weekend while performing the 12K shuffle I discovered the hose pinched shut. I would assume that it was assembled at the factory this way. The hose was pinched between the back edge of the fuel tank and the top left corner of the crankshaft cover. If you notice your tank venting air when the cap is removed I would have this item checked ASAP.
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post #2 of 10 Old Aug 19th, 2008, 9:40 am
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Re: Roll over Valve Hose Hazard!!!

often that hiss when opening the gas cap means the cannister has collapsed from overfilling.

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post #3 of 10 Old Aug 19th, 2008, 9:41 am
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Re: Roll over Valve Hose Hazard!!!

Quote:
Originally Posted by PWelty
I have had several incidents of over pressure venting when removing the gas cap. On occasions even felt the tank shape change when the cap was removed. This weekend while performing the 12K shuffle I discovered the hose pinched shut. I would assume that it was assembled at the factory this way. The hose was pinched between the back edge of the fuel tank and the top left corner of the crankshaft cover. If you notice your tank venting air when the cap is removed I would have this item checked ASAP.
Another thing to check is your cannister under the rear seat. It's probably clogged. Most of us here have just disconnected it. In CA, I wouldn't tell my neighbor though. LOL
There should be no "swoosh" when removing the gas cap as BAD things will begin to happen inside the tank. Fix the problem ASAP!.


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Bought used K1200LT number 3. This one is green/teal with 31,369(now 7/29/2018 54,143) miles and is an '02. The first 2 bikes made it to near 150,000 miles.
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Due to heart health, the Dr says not to ride under 40 degree air temp. Ugh! Now it is harder to get my 18000 miles a year in just in the summer. Guess that stopped my 20 degree rides now.
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78 years young!
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Love this LT bike and still waiting for my first speeding ticket. LOL
Vern
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post #4 of 10 Old Aug 19th, 2008, 8:47 pm Thread Starter
 
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Re: Roll over Valve Hose Hazard!!!

You can't plug a removed canister... I removed the canister when this problem first reared it's ugly head. Unfortunately this cannisterectomy failed to solve the problem. The dealer failed to find the problem as well. The hose was pinched so hard and 12K worth of crankcase cover contact reshaped the line so badly I had to replace the entire hose. This is a significant problem if you take the bike up any altitudes above 4000 feet this could cause a catastrophic failure do to atmospheric pressure change.
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post #5 of 10 Old Aug 20th, 2008, 11:17 am
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Re: Roll over Valve Hose Hazard!!!

Ok what about the mud dauber wasp that builds one in the end of the hose. What then? I know this was man made (or induced) but I don't see a catastrophic failure happening at 4000 ft. It is just a vent line and will collapse the tank and possibly damage the fuel sender. Yeah if you don't notice it you could suffer from fuel starvation just like if you ran out of fuel.

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post #6 of 10 Old Aug 20th, 2008, 11:47 am
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Re: Roll over Valve Hose Hazard!!!

Quote:
Originally Posted by jzeiler
Ok what about the mud dauber wasp that builds one in the end of the hose. What then? I know this was man made (or induced) but I don't see a catastrophic failure happening at 4000 ft. It is just a vent line and will collapse the tank and possibly damage the fuel sender. Yeah if you don't notice it you could suffer from fuel starvation just like if you ran out of fuel.
I was puking a quart or more of tranny fluid all OVER the place every time I cold started started my 88 Chevy truck - but - the tranny worked just fine! All I could think was man, this is going to be expensive... I kept dumping fluid in until I had the time to look at it.

I never could figure it out and finally took it to a pro for diagnosis. He pulled the pan, changed the filter, test drove and told me there was absolutely NOTHING wrong with the tranny (to the tune of $170.00).

While he was lowering it off the lift he poked his head up in the tunnel and noticed that the tip of the vent hose was packed with mud:

Courtesy of an insect just trying to build a nice home for his family.


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post #7 of 10 Old Aug 20th, 2008, 1:00 pm
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Re: Roll over Valve Hose Hazard!!!

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Originally Posted by RonKMiller
I was puking a quart or more of tranny fluid all OVER the place every time I cold started started my 88 Chevy truck - but - the tranny worked just fine! All I could think was man, this is going to be expensive... I kept dumping fluid in until I had the time to look at it.

I never could figure it out and finally took it to a pro for diagnosis. He pulled the pan, changed the filter, test drove and told me there was absolutely NOTHING wrong with the tranny (to the tune of $170.00).

While he was lowering it off the lift he poked his head up in the tunnel and noticed that the tip of the vent hose was packed with mud:

Courtesy of an insect just trying to build a nice home for his family.
I can't even begin to count how many "Check Engine" lights are set by spider webs in the hoses of car evaporative emissions systems....

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post #8 of 10 Old Aug 20th, 2008, 3:17 pm
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Re: Roll over Valve Hose Hazard!!!

Quote:
Originally Posted by Tat_n_Telle
I can't even begin to count how many "Check Engine" lights are set by spider webs in the hoses of car evaporative emissions systems....
HAHA - those little buggers set off my smoke alarms in my house every once and a while too - only at 3:00 am of course!


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post #9 of 10 Old Aug 20th, 2008, 4:00 pm
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Unhappy Re: Roll over Valve Hose Hazard!!!

Quote:
Originally Posted by PWelty
You can't plug a removed canister... I removed the canister when this problem first reared it's ugly head. Unfortunately this cannisterectomy failed to solve the problem. The dealer failed to find the problem as well. The hose was pinched so hard and 12K worth of crankcase cover contact reshaped the line so badly I had to replace the entire hose. This is a significant problem if you take the bike up any altitudes above 4000 feet this could cause a catastrophic failure do to atmospheric pressure change.
Who mentioned PLUG a REMOVED cannister?

I said to REMOVE the plugged cannister.

Somehow, your fuel tank isn't allowing air in as fuel is going out. I just mentioned ONE of many possibilities as a couple others have done. When you posted your question, I didn't see any mention of your already removing the cannister.
Sorry I tried to help.

Have a nice day, and good luck.


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Bought used K1200LT number 3. This one is green/teal with 31,369(now 7/29/2018 54,143) miles and is an '02. The first 2 bikes made it to near 150,000 miles.
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Due to heart health, the Dr says not to ride under 40 degree air temp. Ugh! Now it is harder to get my 18000 miles a year in just in the summer. Guess that stopped my 20 degree rides now.
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78 years young!
04 Honda Reflex.....Hers (it mostly sits)
Converted HD rider.
Love this LT bike and still waiting for my first speeding ticket. LOL
Vern
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post #10 of 10 Old Aug 20th, 2008, 5:22 pm
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Re: Roll over Valve Hose Hazard!!!

Of course you can Plug a Removed cannister. How else to prevent Ron's bugs from making it into a nice insect motel while sitting on the back shelf?

Still Just Jerry

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