DIY: Charcoal Canister Removal on F800GS (with pictures!!)

[JRWooden]

Has anyone figured out what is done on non-USA bikes with the tap on the tank that would connect to the CC?

Is it simply capped off?

[Singletrack_mind]

Originally Posted by JRWooden

Has anyone figured out what is done on non-USA bikes with the tap on the tank that would connect to the CC?

Is it simply capped off?

Post #30, page 2.

The valve is still there, but the line it's in just vents to atmosphere instead of going into a carbon canister.

[JRWooden]

Originally Posted by Singletrack_mind

Post #30, page 2.

The valve is still there, but the line it's in just vents to atmosphere instead of going into a carbon canister.

STM:

Sorry I'm confused .... it's saturday...
Here' is the picture for USA bikes of the tank ... it looks the same to me?



See next post for other picture ... since I can only upload one picture per post....

[JRWooden]

Here is the CC layout on US bikes ... on Euro bikes what happens to the tank fitting to which #9 is attached, or does that attach somewhere else the fiche is not too clear on that ..............

['Flagger]

You can get the Euro version of the microfiche here:

http://www.realoem.com/bmw/index.do

[YetiGS]

Originally Posted by JRWooden

Here is the CC layout on US bikes ... on Euro bikes what happens to the tank fitting to which #9 is attached, or does that attach somewhere else the fiche is not too clear on that ..............

Attachment 297388

My understanding is that the line (#9) leaves the tank, goes through the little valve (#8) and then runs to where I have my filter where it vents to the atmosphere.

[JRWooden]

Originally Posted by YetiGS

My understanding is that the line (#9) leaves the tank, goes through the little valve (#8) and then runs to where I have my filter where it vents to the atmosphere.

Wow... so they use TWO of the "ventilation valves" P/N: 16117721943 ?
Item #8 in the CC diagram, and item #17 in the tank diagram....
Item #17 being downstream of the tip-over valve and item #8 being connected directly to the tank ....

That kinda makes my head hurt ... more .... I think it is time for .......

[Singletrack_mind]

Originally Posted by JRWooden

Wow... so they use TWO of the "ventilation valves" P/N: 16117721943 ?
Item #8 in the CC diagram, and item #17 in the tank diagram....
Item #17 being downstream of the tip-over valve and item #8 being connected directly to the tank ....

That kinda makes my head hurt ... more .... I think it is time for .......

I'm pretty sure that "Ventilation valve" (PN 16117721943) which appears in both the carbon canister diagram and the fuel tank diagram is actually the same piece. It certainly bears the same part number, and I am not aware of that valve being in two places on my bike. I think it's just a question of how the parts diagrams are drawn up. The exact same tank diagram is used for the euro model, so it has to include the valve, but in the USA they add the Carbon Canister diagram and include the valve again because it's part of the system. Just a little overlap.

[YetiGS]

Originally Posted by Singletrack_mind

I'm pretty sure that "Ventilation valve" (PN 16117721943) which appears in both the carbon canister diagram and the fuel tank diagram is actually the same piece. It certainly bears the same part number, and I am not aware of that valve being in two places on my bike. I think it's just a question of how the parts diagrams are drawn up. The exact same tank diagram is used for the euro model, so it has to include the valve, but in the USA they add the Carbon Canister diagram and include the valve again because it's part of the system. Just a little overlap.

Exactly. There's just one valve.

[JRWooden]

Ok my last stupid question for today:

So, what we're saying is that the hose that is shown as #18 in the tank diagram is the same as #7 in the CC diagram (for USA bikes)?

[YetiGS]

Originally Posted by JRWooden

Ok my last stupid question for today:

So, what we're saying is that the hose that is shown as #18 in the tank diagram is the same as #7 in the CC diagram (for USA bikes)?

Yes.

[JRWooden]

Thank you ...
Some of us are in the slow group

Where is that damn valve located physically on the bike??

I wondering what the downside would be of taking the thing out completely....

[ebrabaek]

Originally Posted by JRWooden

Thank you ...
Some of us are in the slow group

Where is that damn valve located physically on the bike??

I wondering what the downside would be of taking the thing out completely....

18 inches behind the filler neck..... Take off the right side tank plastic... you will see it.... Little 25mm long aluminum canister....by 7mm diameter....

NONE



Erling

[JRWooden]

Ok my new replacement tank (about 6 months old) has started to crack, small crack at present, but it's there.
I still have the canister system installed as original - did did not want to get in a fight about the tank swap not being covered because I HAD removed the canister ...

I think the replacement tank should have a 2-year warranty maybe parts only ... not labor ???

I know the dealer inspected the pressure/vacuum valve when my new tank was installed, but may not have checked for a plugged canister.


If the canister is working properly I think air should pass freely in both directions on all three fittings of the canister (in from tank / out to engine / vent).

Does this sound right? I likely should either inspect the canister ............ once I'm sure I know what to expect....

Then make a plan ....

[ebrabaek]

Originally Posted by JRWooden

Ok my new replacement tank (about 6 months old) has started to crack, small crack at present, but it's there.
I still have the canister system installed as original - did did not want to get in a fight about the tank swap not being covered because I HAD removed the canister ...

I think the replacement tank should have a 2-year warranty maybe parts only ... not labor ???

I know the dealer inspected the pressure/vacuum valve when my new tank was installed, but may not have checked for a plugged canister.


If the canister is working properly I think air should pass freely in both directions on all three fittings of the canister (in from tank / out to engine / vent).

Does this sound right? I likely should either inspect the canister ............ once I'm sure I know what to expect....

Then make a plan ....

Yeppers on the 24 month warranty on the parts... At least thats what my dealer states as well. Personally I would rip out the cc... Just for good measure. I reinstalled the pressure/vacuum valve in my filter....as it is minimizing the fuel oders venting to the outside...and I have had no issues with over pressurized tank. My opinion..... Even with an over pressurized tank....ie... malfunctioning vent system..... it will NOT cause the tank to crack...... You would need to engage with pressures and vacuum numbers....far greater than what the bike would tolerate..... I really think bad casting is the issue here.... Mine is '09....HOT desert.... lots of uv..... not a thing... Just imho....

Erling