BMW K bikes (Bricks)

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1Back to top Go down   Fuel cap gasket Empty Fuel cap gasket on Sat May 09, 2020 9:51 am

Snod Blatter

Snod Blatter
Life time member
Life time member
Hi all, last time I filled 'er up (just before the lockdown started..) I noticed this gasket has kinda melted and come away:

Fuel cap gasket A3NlJxf

I'm guessing this is also related to the distinct aroma of petrol that hangs under the bike cover on warm days. So, first off, I guess I need the most expensive seal set here because it's the only one that seems to have this seal in it. Secondly, does anyone know if I can buy that part separately? And thirdly, can I buy one from somewhere that isn't going to melt when it comes into contact with fuel??

Cheers all!


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1989 K100RS SE ABS 8v  VIN: 0149214
Others: 1.5 x Honda CBX250RS-E, '94 CB250, '95 TRX850, '16 Z250SL
http://justbikethings.blogspot.co.uk/
    

2Back to top Go down   Fuel cap gasket Empty kit on Sat May 09, 2020 1:04 pm

moriarti

moriarti
Life time member
Life time member
Lucky you the seal on mine has turned to stalactite like rock very near impossible
to remove without damage to the seating lip.Buy the BMW kit or just make your own using good cork gasket and sticky stuff to seal it  Laughing dont know anyone that 
just supplies it on its own


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1984 k100 rs red/black VIN  0004449
    

3Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Sun May 10, 2020 1:42 am

volador

volador
Life time member
Life time member
Petrol Tank Cap Gasket 16111456007

Gasket set Fuel Tank BMW 16119062461 Tills.de


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1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

4Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Sun May 10, 2020 8:16 pm

Snod Blatter

Snod Blatter
Life time member
Life time member
Thanks both, the expensive kit it is then..

The gasket appears to be neoprene which I would expect to melt if left in contact with petrol, but if others haven't had the issue then maybe it's a one off??


__________________________________________________
1989 K100RS SE ABS 8v  VIN: 0149214
Others: 1.5 x Honda CBX250RS-E, '94 CB250, '95 TRX850, '16 Z250SL
http://justbikethings.blogspot.co.uk/
    

5Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Sun May 10, 2020 8:26 pm

Laitch

Laitch
Life time member
Life time member
@Snod Blatter wrote:Thanks both, the expensive kit it is then..

The gasket appears to be neoprene which I would expect to melt if left in contact with petrol, but if others haven't had the issue then maybe it's a one off??
It's likely to be made of Viton, a synthetic rubber that is fuel- and heat-resistant.


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1995 K75 81,000 miles
Fuel cap gasket Usa-lo10
    

6Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Mon May 11, 2020 12:09 am

MartinW

MartinW
Life time member
Life time member
I managed to soften one up by soaking it in Oil of Wintergreen for a couple of weeks. However once removed it hardened back up.
Regards Martin.


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K75s Hybrid
    

7Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Mon May 11, 2020 10:10 am

Snod Blatter

Snod Blatter
Life time member
Life time member
Are you all looking at the one that actually does the sealing? I'm talking about the one at the back which has definitely not gone hard, more gone floppy!


__________________________________________________
1989 K100RS SE ABS 8v  VIN: 0149214
Others: 1.5 x Honda CBX250RS-E, '94 CB250, '95 TRX850, '16 Z250SL
http://justbikethings.blogspot.co.uk/
    

8Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Mon May 11, 2020 10:23 am

Laitch

Laitch
Life time member
Life time member
@Snod Blatter wrote:Are you all looking at the one that actually does the sealing?
I think they all do sealing for one purpose or another. Smile The "back" one seems to supply tension and cushioning to the cap in addition to any sealing duties it might provide.

Your assembly has corrosion to an extent that makes me wonder if the water drain line and the vapor line are plugged.


__________________________________________________
1995 K75 81,000 miles
Fuel cap gasket Usa-lo10
    

9Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Mon May 11, 2020 10:28 am

Snod Blatter

Snod Blatter
Life time member
Life time member
Ahhh is that what it does? I was hoping it would make more sense once I took it to bits. I guess that helps explain why they all come as a set.

Fair shout about the drain hole being blocked, I did have an occasion where I opened the cap and a load of water fell into the tank! I just brimmed her and went home.. Seemingly none the worse for it. It's always looked like that while I've owned it though, thought it seemed normal enough.


__________________________________________________
1989 K100RS SE ABS 8v  VIN: 0149214
Others: 1.5 x Honda CBX250RS-E, '94 CB250, '95 TRX850, '16 Z250SL
http://justbikethings.blogspot.co.uk/
    

10Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Mon May 11, 2020 7:58 pm

volador

volador
Life time member
Life time member
Petrol Tank Cap Gasket 16111456007 is made of rubber cellulose material a medium/high density neoprene.

If that's the original cap gasket you got your moneys worth.

Service Bulletin 2196 February 1986

Regards Martin. probably referring to Fuel tank GASKET RING 16111453690 K75 - K1100LT scented with Oil of Wintergreen

Try a lengthy soak in 303 Aerospace Protectant to renew plasticity in rubber. It will never be new again but may become serviceable.

FYI: Rub the Oil of Wintergreen on the chest to kill the COVID-19
Fuel cap gasket 16111453690_3_B
Fuel cap gasket 16111453690_2_B


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1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

11Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Tue May 12, 2020 9:01 am

Gaz

Gaz
Life time member
Life time member
Something to try when attempting to revive rubber bits - Gummi-Pflege.

Funny sounding name but it seems to work. First brought to my attention by our now sadly departed member MikeP.

Read post 131 in the following thread.
Will I never learn

Cheers


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Gaz
1990 K75 6427509; 1987 R80G/S PD 6292136; 2010 G650GS ZW13381; 95 K1100LT 0232224
    

12Back to top Go down   Fuel cap gasket Empty Re: Fuel cap gasket on Tue May 12, 2020 1:48 pm

volador

volador
Life time member
Life time member
Gummi-Pflege  82149407015  no luck not available from the MaxBMW fiche

worthwhile alternates

Genuine Honda 08798-9013 Silicone Grease
rejuvenate rubber seals, lubricating door seals, window channels, sunroof seals

Genuine Honda 08798-9002 Hi Temp Urea Grease
metal-to-metal contact


__________________________________________________
1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

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