BMW K bikes (Bricks)

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1Back to top Go down   radiator cap ...parts missing ? Empty radiator cap ...parts missing ? on Mon Dec 22, 2014 6:47 pm

charlie99

charlie99
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hi guys ,
just noticed this today

I think there should be a gasket - rubber on the inner (lower) sealing shoulder of the radiator cap

can someone confirm this ?

might explain a few things about expansion into the reservoir


radiator cap ...parts missing ? 20141222


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Oradiator cap ...parts missing ? Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

2Back to top Go down   radiator cap ...parts missing ? Empty Re: radiator cap ...parts missing ? on Mon Dec 22, 2014 7:17 pm

Inge K.

Inge K.
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Part #17 11 1 460 759.
The valves in the cap won't function properly without it, no pressure and
vacum build up....as the fluid/vapour rather takes the easiest way.



Last edited by Inge K. on Mon Dec 22, 2014 7:24 pm; edited 1 time in total


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

3Back to top Go down   radiator cap ...parts missing ? Empty Re: radiator cap ...parts missing ? on Mon Dec 22, 2014 7:19 pm

sidecar paul

sidecar paul
Life time member
Life time member
Yes Charlie, there should be a rubber gasket there. Here's a pic of my old style cap compared to the newer style. 

radiator cap ...parts missing ? Sam_0824

The gaskets do tend to swell with age, as can be seen looking at the old gasket compared with the new one.

Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015) 
....No CARS never ever!
    

4Back to top Go down   radiator cap ...parts missing ? Empty Re: radiator cap ...parts missing ? on Mon Dec 22, 2014 7:40 pm

charlie99

charlie99
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thanks guys what I thought

I can easily hear fluid pumping back and forwards to the reservoir just by clamping the bypass hose with my fingers

I don't think that that should happen 

cheers again

ill try and make one today ...tyre tube rubber ?


oh  btw ..cleaned up now


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Oradiator cap ...parts missing ? Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

5Back to top Go down   radiator cap ...parts missing ? Empty Re: radiator cap ...parts missing ? on Mon Dec 22, 2014 7:51 pm

Inge K.

Inge K.
VIP
VIP
The gasket is higher/thicker than the grove in the cap.
If you use a material that have the same thickness as the grove,
it could be that you don't get enough pressure on the sealing surface.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

6Back to top Go down   radiator cap ...parts missing ? Empty Re: radiator cap ...parts missing ? on Mon Dec 22, 2014 8:21 pm

blaKey

avatar
Life time member
Life time member
Charlie, I have a spare cap and a spare rubber gasket that's yours if you want it/them.

Crappy time of year due to gatherings/travel etc, but if anything can be organized, I will be in Bris Vegas on Christmas morning (Indooroopilly) if that helps.


__________________________________________________
Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

7Back to top Go down   radiator cap ...parts missing ? Empty Re: radiator cap ...parts missing ? on Mon Dec 22, 2014 9:19 pm

charlie99

charlie99
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thanks inge and blakey

will look around for something

no big rush I guess, its been like it as long as I can remember    or fell out one time and I didn't notice

trust bmw to build in a little trickery


cheers

mean while ready for a start ...but no go  yet ..checking stuff ...a can of "start you barstard " might be purchased today

grin


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Oradiator cap ...parts missing ? Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

8Back to top Go down   radiator cap ...parts missing ? Empty Re: radiator cap ...parts missing ? on Tue Dec 23, 2014 6:01 pm

sidecar paul

sidecar paul
Life time member
Life time member
A new gasket is 2.5 mm thick, Charlie.

Cheers,
Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015) 
....No CARS never ever!
    

9Back to top Go down   radiator cap ...parts missing ? Empty Re: radiator cap ...parts missing ? on Tue Dec 23, 2014 8:43 pm

charlie99

charlie99
VIP
VIP
thanks paul ...yep that helps

cheers


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Oradiator cap ...parts missing ? Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

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