BMW K bikes (Bricks)


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1Back to top Go down    Petrol tank and fuel pump on Mon Jul 03, 2017 11:54 am

timo27

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Hi, with ref. to my 1984 k100, one thing thats been on my mind is that of the wiring of the fuel pump in the tank covered in fuel?? do they ever blow up.

    

2Back to top Go down    Re: Petrol tank and fuel pump on Mon Jul 03, 2017 12:00 pm

Holister

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You mean like this?

    

3Back to top Go down    Re: Petrol tank and fuel pump on Mon Jul 03, 2017 12:02 pm

timo27

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Yes you got it .......

    

4Back to top Go down    Re: Petrol tank and fuel pump on Mon Jul 03, 2017 12:14 pm

92KK 84WW Olaf

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Never heard of it happening and may cars use a similar arrangement. You need an arc short aross a gap, like a spark plug, in fuel vapour, to get a big bang. So always disconnect battery and power off when working in tank....even if you pull the tank plug connector.


__________________________________________________
1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 58,645 now 60,500miles
    

5Back to top Go down    Re: Petrol tank and fuel pump on Mon Jul 03, 2017 8:38 pm

MartinW

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That's why you should always wear ear plugs.
Regards Martin.

    

6Back to top Go down    Re: Petrol tank and fuel pump on Mon Jul 03, 2017 8:38 pm

RicK G

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I have never heard of it happening. To ignite petrol in liquid form is almost impossible and even the vapour needs to have the air vapour mix right to ignite. I think these figures are right but I will stand corrected. If the mix is less than about 3 to 1 or over 18 to 1 then it wont ignite. That's why a lean mix wont ignite in an engine and a flooded engine wont start. Usually the pump and gauge are below the fuel level and also the air to vapour mix above the fuel level is like a flooded engine.
Almost since the advent of electric fuel gauges there has been 12v connections inside the tank and those senders would be far more likely to develop a fault where arcing would occur than a fuel pump.


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

7Back to top Go down    Re: Petrol tank and fuel pump on Tue Jul 04, 2017 4:53 am

Holister

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I think the worst that could happen is if you had a leaking fuel line and fuel got onto a hot engine. That might set your pants on fire affraid

I think if I was the guy second from the right, I'd be moving off pretty quick.


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

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