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1Back to top Go down   brown oily sludge when i drained oil Empty brown oily sludge when i drained oil Mon Aug 17, 2020 2:10 pm

ballochman

ballochman
active member
active member
drained the oil on my k75s today brown sludge is what came out any ideas?thanks in advance guys

    

MartinW

MartinW
Life time member
Life time member
What colour is it, is it milky, it could be water? Check to see if your water level is down. When was the last oil change? Is the bike new to you?
Regards Martin.


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1992 K75s
    

moriarti

moriarti
Life time member
Life time member
Brown oil DEFO water contamination.Run a compression test to identify blown head gasket ect.Oil/water pump maybe suspect also.This engine will need  SERIOUS Flushing  ;BMW;


__________________________________________________
1984 k100 rs red/black VIN  0004449 Now sold to Olaf
    

92KK 84WW Olaf

avatar
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Whats the history of the engine? Last oil change? had the bike long? any leaks of coolant? condensation inside engine, etc etc

Need to know more.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 48,061 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 61,190 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
There is a weep hole on the water/oil pump on the front of the engine. 

Is it blocked?  If so, coolant getting past the water pump shaft seal will be able to get into the oil past the oil pump shaft seal.  If the hole is plugged with dirt, etc, when you clear it, I would expect coolant to come out.  That will tell you that you need to rebuild the pump.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

BobT

BobT
Life time member
Life time member
When you start the bike do you ride it till the engine gets hot? Do you only do short journeys that never get the oil up to temperature? Do you ever start the bike and not ride it?
All of these things can destroy an engine.

    

Laitch

Laitch
Life time member
Life time member
MartinW wrote:What colour is it, is it milky, it could be water?
The description seems chocolate milky or unbaked fudgy.


__________________________________________________
1995 K75 90,000 miles
    

ballochman

ballochman
active member
active member
hi guys
the bike is new to me it lay covered for 12 years I got it running before I stripped it down to build a cafe racer.the water pump leakage hole is clear the oil was like milk chocolate.I have stripped the waterpump .but what is worrying me is there was water in number 3 cylinder when i was trying to get the bike running so im thinking the head gasket is away.when i got the bike it was just an engine in a frame i put water in it then ran it for about 15mins .so i drained the oil then noticed the crud i dont know whether to replace the engine yet i ordered a gasket so i will check the head anyway the engine has only done 16k miles.

    

Suzi Q

Suzi Q
Life time member
Life time member
I think that removing the head is the right way to go - whether the stuff in the cylinder is coolant from a leaky gasket (or worse) or just rainwater that has found its way in during storage.
It is possible to reuse head gaskets, so take care removing it just in case its okay.


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Sometimes I'm not really Suzi Quatro.
    

ballochman

ballochman
active member
active member
cheers
i have a gasket on the way anyway and i have a pump rebuild kit but the pump now seems a bit stiff i might look for a replacement.if there is no joy with the head I will source a replacement engine.yet when i checked the compression 1 and 2 had 150 and three has 210.i did oil the cyclinders to unstick them when i got the bike but maybe the high compression and the fact that i found water in number 3 point to a gasket failure

    

Suzi Q

Suzi Q
Life time member
Life time member
Don't abandon the engine just because of crud, this stored-for-a-long-time mystery engine ended up running just fine with good compression - and the head gasket was reused too:
brown oily sludge when i drained oil 01611
brown oily sludge when i drained oil 02011
And this sludge that was in it takes some beating:
brown oily sludge when i drained oil 00512


__________________________________________________
Sometimes I'm not really Suzi Quatro.
    

ballochman

ballochman
active member
active member
if i find a crack or damage then i will consider an engine i put one in my st1300 this year as it was cheaper than honda gaskets.im hoping it will just be the gasket

    

Dai

Dai
Life time member
Life time member
If the rebuilt pump is a bit stiff, chances are you've driven the big gear hard up against the housing. Give the nose a sharp rap with a hammer and then try turning it again.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

ballochman

ballochman
active member
active member
thanks will do

    

Rick G

Rick G
admin
admin
Most definitely water contamination either from a bad pump or head gasket. Check the coolant for oil and a leakdown test to check for head gasket damage.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

ballochman

ballochman
active member
active member
unfortunately the engine has no water attached I had stripped it all down for painting when i dropped the oil and went to change the pump kit as it had a leak from the right hand side area of the cover high up.but during my getting it running process i blew out the cylinders with air and number 3 had water in it.thus suspecting the gasket.before i put the water in and got the bike running the oil had been old but black when i removed it the colour was brown it only ran up and down the carpark too

    

Rick G

Rick G
admin
admin
If there is water in one cylinder then the head needs to come off.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

92KK 84WW Olaf

avatar
Life time member
Life time member
If it was sitting and leaking at an injector O ring water can enter a cylinder through an open or badly seated valve.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 48,061 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 61,190 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

ballochman

ballochman
active member
active member
so took head off and all appears good so maybe the pump is the cause I will fit a new kit in the pump and a new head gasket and take it from there.thanks for your help guys
dont know how to post pictures or i would show you

    

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