BMW K bikes (Bricks)

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1Back to top Go down    leaking bolt near water pump on Sun Mar 13, 2016 1:28 pm

Paul Friday

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Looking at the front of the engine, facing to the rear of the bike. There is a hose connected that goes through the tunnel in the sump. Just above the hose connection is a socket-head bolt. Mine appears to leak water. The Haynes manual says the drain plug is underneath the pump, so what's this?
The bike is a 1985 K100.
Thanks

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2Back to top Go down    Re: leaking bolt near water pump on Sun Mar 13, 2016 1:41 pm

ReneZ

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Picture?


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

Rene


BMW K100 - 1985 (0030029)
BMW K1200GT - 2003 (ZK01223)
    

3Back to top Go down    Re: leaking bolt near water pump on Sun Mar 13, 2016 2:32 pm

robmack

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Could it be leaking from the thermostat housing? Is it that you are referencing?


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Robert
1987 K75 @k75retro.blogspot.ca
2011 Moto Guzzi V7 Racer
http://k75retro.blogspot.ca/
    

4Back to top Go down    Re: leaking bolt near water pump on Sun Mar 13, 2016 2:46 pm

ReneZ

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Sounds like the lub oil pressure control slide bolt, but that shouldn't leak water...


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

Rene


BMW K100 - 1985 (0030029)
BMW K1200GT - 2003 (ZK01223)
    

5Back to top Go down    Re: leaking bolt near water pump on Sun Mar 13, 2016 9:08 pm

88

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Paul - k1100, k100 or k75. Most people put their bike and the frame number in their signature, helps enormously figuring out what you're looking at. There's a sticky on posting pics in the forum area. Post one up and you'll get better quality answers. Right now we're only guessing.


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88....May contain nuts!

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick!
Mods: k1100 screen and stands

K1100rs 1995, Remus exhaust.
    

6Back to top Go down    Re: leaking bolt near water pump on Sun Mar 13, 2016 10:52 pm

Holister

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The rusty socket head plug just above the coolant inlet in this pic I found??
A quick parts check and internet search shows it uses a relatively common gasket ring used in oil pumps and is also used in Karcher pressure washers. A20X24-CU (BMW part #07119963342)


But maybe its the radiator hose that's leaking and not the plug.


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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
    

7Back to top Go down    Re: leaking bolt near water pump on Mon Mar 14, 2016 1:14 am

RicK G

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That is the oil pressure reliefe valve there. If it were leaking coolant then you have bigger problems than a leaking seal. As the Kaptain has said it is most likely coming from the radiator hose just below or dripping down from the top joint of the same hose.


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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
    

8Back to top Go down    Re: leaking bolt near water pump on Sun Mar 20, 2016 5:36 am

Paul Friday

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Yes, that's the bolt. Oil pressure relief really shouldn't be leaking water. Eek! I guess that the water leak will be somewhere above it and the water is dripping onto the bolt head. Not another new radiator.... This will be my fourth.
Thanks.

http://www.theostry.com
    

9Back to top Go down    Re: leaking bolt near water pump on Sun Mar 20, 2016 6:21 am

charlie99

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it shouldn't be the radiator

more likely the seals in the water / oil pump have given up ....and someone has undone the cap bolt to the oil pressure valve ...and not replaced the fractured seal under the bolt head ...and possibly hasn't tensioned it up properly

there maybe other issues in the coolant system if oil / water has been transferring(highly likely )
possibly the radiator cap relief valves and seal has been affected possibly letting undo pressure to retain in the system and bleed across to the oil pump ..likely after stopping the engine ?!!

it might pay to remove the tank and inspect the radiator cap ...and the water reservoir for oil contamination plus any sign of milkiness in the oil

just some thoughts ....

we don't - shouldn't go replacing stuff that is unlikely ...without proving the fault first

and I haven't seen any proving so far...
good luck

but get backto us after inspecting some more stuff


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

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

10Back to top Go down    Re: leaking bolt near water pump on Sun Mar 20, 2016 9:13 pm

K75cster

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G'day Paul, If it appears wet and rusty then that may be a result of the rain its ridden through, or if its wet now then that may be an indication the radiator hose is leaking at that point where it attaches to the water pump spigot. You know you will loose the coolant from the motor when you undo that hose clamp and check to see how or if its been leaking, Either way to investigate its best to have a few items ready if all you have to do is replace that hose. New glycol coolant and hose clamp or hose to start the inspection.


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Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

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