BMW K bikes (Bricks)


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1Back to top Go down   HELP!!! FUEL LEAK!! Empty HELP!!! FUEL LEAK!! Wed Sep 08, 2010 6:59 pm

mook

mook
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Coming home from work today I smelled fuel.
Looked down, and on the LH side of the bike, and sure enough there's fuel pissing onto my hot exhaust!

Looking closer, at the back end of the Fuel injection pipe(?) there's a fuel pipe which snakes back in and then forward.
this pipe was leaning against the engine, and I guess after 25 years, the vibration/heat wore a hole.

the result when the engines running the fuel just pisses out onto the road.

I've looked here: and I can't find the fuel pipe listed. the closest is at the other end of the fuel injection pipe.
"Fuel hose 8x13mm part no. 16121180409

is this the right replacement part?

thanks!

    

2Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 9:26 pm

Crazy Frog

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Are you talking about the hose feeding the fuel rail? Is that hose #2 you are looking for?
All the hoses are under 'fuel preparation' They are also selling straight hoses by the meter.

HELP!!! FUEL LEAK!! Fuel_h10


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HELP!!! FUEL LEAK!! Frog15HELP!!! FUEL LEAK!! Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

3Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 9:31 pm

mook

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Nope. My hose is the feed hose, at the other end of the fuel rail.
it travels in front of the ignition coil towards the centre of the bike.

are all fuel lines on this bike the same size?

    

4Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 9:33 pm

Crazy Frog

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this one?

HELP!!! FUEL LEAK!! 13311461011_1_B


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HELP!!! FUEL LEAK!! Frog15HELP!!! FUEL LEAK!! Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

5Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 9:35 pm

Crazy Frog

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I believe that all the fuel hoses are the same diameter, but some are pre-formed. If you use a straight hose, it maybe pinched when bending on tight spots


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HELP!!! FUEL LEAK!! Frog15HELP!!! FUEL LEAK!! Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

6Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 9:44 pm

mook

mook
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hope this pic works,
the line I'm on about is behind the one with the spring around it


HELP!!! FUEL LEAK!! Dsc01511



Last edited by Crazy Frog on Wed Sep 08, 2010 9:57 pm; edited 1 time in total (Reason for editing : rotated the picture)

    

7Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 9:51 pm

ReneZ

ReneZ
Life time member
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That's (5) the vacuum line between the fuel pressure regulator and the throttle barrel. That shouldn't leak any petrol, otherwise your fuel regulator is shot. From the above I assume/understood you meant the hose between the aft end of the fuel rail and also the fuel pressure regulator; that would be No. 6. The fuel pressure regulator is a pain to get at as fitted on the inner side of the throttle bodies.


__________________________________________________
Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland HELP!!! FUEL LEAK!! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

8Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 9:52 pm

ReneZ

ReneZ
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Oops, where did the drawing go??


__________________________________________________
Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland HELP!!! FUEL LEAK!! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

9Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 10:00 pm

mook

mook
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ReneZ wrote:That's (5) the vacuum line between the fuel pressure regulator and the throttle barrel. That shouldn't leak any petrol, otherwise your fuel regulator is shot.
Well is was pissing fuel out and only when the fuel pump was turning. Maybe I wasn't clear, the fuel line I am on about is behind the one with the spring around it
ReneZ wrote:From the above I assume/understood you meant the hose between the aft end of the fuel rail and also the fuel pressure regulator; that would be No. 6. The fuel pressure regulator is a pain to get at as fitted on the inner side of the throttle bodies.
that's the one! exactly!

thanks!

    

10Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 10:01 pm

Crazy Frog

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ReneZ wrote:That's (5) the vacuum line between the fuel pressure regulator and the throttle barrel. That shouldn't leak any petrol, otherwise your fuel regulator is shot.

I will second the motion Very Happy
The membrane in your fuel regulator may be cracked and leaking.


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HELP!!! FUEL LEAK!! Frog15HELP!!! FUEL LEAK!! Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

11Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 10:07 pm

mook

mook
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Hmmm... I'm certain it in no6 as ReneZ described,
running from the aft end of the fuel rail in behind the throttle bodies.

you can see it there in the pic, going down under the TPS

    

12Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 10:24 pm

Crazy Frog

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mook wrote:
I've looked here: and I can't find the fuel pipe listed. the closest is at the other end of the fuel injection pipe.
"Fuel hose 8x13mm part no. 16121180409

is this the right replacement part?

thanks!

Yes this is part # 16121180409


__________________________________________________
HELP!!! FUEL LEAK!! Frog15HELP!!! FUEL LEAK!! Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

13Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 08, 2010 10:31 pm

mook

mook
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Thanks for your help guys!

    

14Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Thu Sep 09, 2010 12:37 am

ReneZ

ReneZ
Life time member
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No worries, and now you'll need to get at that regulator to replace it. "Our thoughts are with you" Very Happy


__________________________________________________
Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland HELP!!! FUEL LEAK!! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

15Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Thu Sep 09, 2010 12:48 am

phil_mars

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I just used aftermarket high pressure fuel injection hose with no problems and no sharp bends either.

Granted the regulator is not fun to get at but a stubby screwdriver and a lot of patience will sort it out. Smile


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Regards,
Phil
    

16Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Thu Sep 09, 2010 12:48 am

Crazy Frog

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ReneZ wrote:No worries, and now you'll need to get at that regulator to replace it. "Our thoughts are with you" Very Happy

Amen!


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HELP!!! FUEL LEAK!! Frog15HELP!!! FUEL LEAK!! Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

17Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Thu Sep 09, 2010 1:02 pm

Ajays

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Hmm,
I didn't find it difficult to get at the regulator...once the filter box is out of the way there is a lot of room to work. whilst there I removed the Vacuum switch that was found unecessary by BMW and not fitted on later models. I also have removed the suction pipe (with the spring protector) and capped it off as the other three are on the advice of Ned's experience.
It may of course just be a perished fracture pipe at the fuel rail connector.
Cheers Ajays


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HELP!!! FUEL LEAK!! Th_Kengine_gif

AJAYS
    

18Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Fri Sep 10, 2010 1:25 pm

whhoon

whhoon
active member
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good morning

i own an early 85 k100 rs and i got lost in that last little bit. are you saying you unhooked the fuel regulator vacuum line? i have previously removed and capped the vacuum switch for timing control as per forum concensous,but the fuel regulator?

    

19Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Fri Sep 10, 2010 5:02 pm

ReneZ

ReneZ
Life time member
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Its being done. Some feel that the bike surges less in lower revs etc. It can't do any real harm if you want to try (just make sure you cap off the pipe on the throttle body. You might get some afterburning in the exhaust though.


__________________________________________________
Greetings from Florida Australia! Having a 'new' K     Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Scotland HELP!!! FUEL LEAK!! Rain
BMW K1200GT - 2003 (ZK01223) Florida
BMW K1200GT - 2004 (ZK27240) Australia
    

20Back to top Go down   HELP!!! FUEL LEAK!! Empty Re: HELP!!! FUEL LEAK!! Wed Sep 15, 2010 12:17 pm

mook

mook
Silver member
Silver member
well Got it sorted.

Unfortunately the replacement clip I got with the hose was the wrong size,
Luckily I didn't completely destroy the original clip, so was able to re-use it.

An absoloute PITA to loosen the clip to remove the hose, bit of finesse, bit of brute force got it done.

Seems to me either:
The original Fuel hose here was too long and therefore rubbing against the hot engine block.
or:
Someone has previously changed this hose and put too much material on there.

either way, I shortened the replacement, so it is well clear of the block.

I'd be interested to know if anyone elses hose touches the block here....

    

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