K11 Owners Group

simonlap · Posted: Fri Jul 15, 2011 11:42 am Post subject:

Got the new monoshock on and it feels like a new bike, BUT, lost some coolant when got back and checked levels, there is no sign of coolant leak from any hose or connection as I did them all and used a quality rubber sealant and cleaned off all the aluminium hose stubs. oil was a bit high and only 130 miles since rebuild and the oil looks very dirty so i drained it and looked closely, seems like just dirty oil and feels ok. Put the same oil back in. Topped up coolant and went for another test, needed to top up coolant again. It was on the lower level. Will keep an eye on it.
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K1100rs 1992 model
F650 ST 1996 model
ride it like you stole it, fix it like it's your first girlfriend

DLBass · Posted: Fri Jul 15, 2011 12:21 pm Post subject:

Is the system over pressuring, and losing fluid once the bike is hot?
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Ernie-NH · Posted: Fri Jul 15, 2011 3:57 pm Post subject:

Simon....

Do you have a small ( 0.062 " ) bypass hole in the thermostat ??

Regards......// Ernie in NH
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AMA,, American Deaf Bikers
Airhead Beemers Club
'11 G650gs
'95 K1100LT
'76 R100/7

simonlap · Posted: Fri Jul 15, 2011 4:15 pm Post subject:

would that be looking straight on at the thermostat housing or from under the housing? BTW, the coolant has dropped again and the oil level has risen, oil is chocolate milk and it's new oil at £25 for 5 litres. This is getting expensive now.
_________________
K1100rs 1992 model
F650 ST 1996 model
ride it like you stole it, fix it like it's your first girlfriend

SugarHillCTD · Posted: Fri Jul 15, 2011 4:31 pm Post subject:

Simon,

Do you see any fluid at the "weep hole" below the oil/water pump assembly?

After you get the bike up to operating temperature then shut it off, do you smell anything?

The combined brain power of the OG will get this nailed down. Wink

John
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John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

simonlap · Posted: Fri Jul 15, 2011 4:46 pm Post subject:

The weep hole is clear as far as I can tell, (and dry) I can put a small drill bit up the hole about 2 or more inches, there is no hot coolant smell when the bike is hot. Do I go ahead and order the seal kit, oil and filter?
_________________
K1100rs 1992 model
F650 ST 1996 model
ride it like you stole it, fix it like it's your first girlfriend

Ernie-NH · Posted: Fri Jul 15, 2011 6:30 pm Post subject:

Hi Simon....

Hey John, this sounds familiar ""oil level has risen, oil is chocolate milk"" !

Simon, you'll have to check out the combo "oil pump/water pump" since they run on a common shaft.. Sounds to me like 'oil/water' crossover...( ie: the water pump seal has failed ) precisely at that location. John ( aka SugarHill ) did a photo workup of this area when he overhauled his previous RS... check it out once some one of us finds it and tells you where it is.

Good luck.....// Ernie in NH
_________________
AMA,, American Deaf Bikers
Airhead Beemers Club
'11 G650gs
'95 K1100LT
'76 R100/7

drikko · Posted: Fri Jul 15, 2011 6:47 pm Post subject:

Scott_Anderson · Posted: Fri Jul 15, 2011 7:38 pm Post subject:

Id say that if the weep hole is clear, the problem is elsewhere. I seem to remember Rydor had the same problem, his was a head gasket.
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Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
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1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

SugarHillCTD · Posted: Fri Jul 15, 2011 8:00 pm Post subject:

That is what I was thinking too Scott, unfortunately. Crying or Very sad

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John & Cathy

'92 K100RS4V Pearl White SOLD
'04 K1200GT
IBA Several-SS1k, BBG, 50CC NYC to S.F.

merlin geikie · Posted: Fri Jul 15, 2011 9:03 pm Post subject:

SugarHill writes:

simonlap · Posted: Sat Jul 16, 2011 4:15 am Post subject:

Thanks for the input so far guys. The brick runs fine ever since i owned it. 10 years stood idle and now all these problems. If i'm gonna strip the head out should I do the water and oil pump seals at the same time do you reckon?
_________________
K1100rs 1992 model
F650 ST 1996 model
ride it like you stole it, fix it like it's your first girlfriend

Scott_Anderson · Posted: Sat Jul 16, 2011 8:07 am Post subject:

simonlap · Posted: Sun Jul 17, 2011 2:53 pm Post subject:

Well I've been real busy this wekend and only just had time to drain the oil 5 mins ago. Thought you may like to see before and after oil which has done no more than 200 miles in 4 days.

Is it worth doing a photo library of the strip down and putting a new head gasket on? Takes time to do but it might come in handy for future reference if no one has put one up yet.
Si.

_________________
K1100rs 1992 model
F650 ST 1996 model
ride it like you stole it, fix it like it's your first girlfriend

Ernie-NH · Posted: Sun Jul 17, 2011 3:42 pm Post subject:

Hi Simon...

If you do go ahead and pull the water pump be sure to download and save a great pictoral "how to" on the IBMWR site. ( K bikes ) The article was compiled by Jon Diaz... and there is a secondary write up with pictures on the same theme there by Don Forsman... ie" all the do's and dont's..

Good luck........// Ernie in NH
_________________
AMA,, American Deaf Bikers
Airhead Beemers Club
'11 G650gs
'95 K1100LT
'76 R100/7

merlin geikie · Posted: Mon Jul 18, 2011 12:15 am Post subject:

Simonlap shows us;

robleyd · Posted: Mon Jul 18, 2011 2:27 am Post subject:

Plus, there are a couple of videos on oil/ware pump overhaul by m1ks in the Tech stickies forum which are most useful.

http://k11og.org/forum/viewtopic.php?t=8250
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David, owner of:
1996 K1100 LT

Rafal · Posted: Mon Jul 18, 2011 6:11 am Post subject:

Hello!

I am reading this topic and have seen few in the past about water in oil problem. In all cases problem of water/oil pump is touched.
There is only one case, when water can get into oil via seals on pump shaft, usually the source of the leak is head gasket.
So called "weep hole" has two main roles. 1st is to indicate ASAP that there is a seal failure. 2nd is to prevent pumping oil into coolant and vice versa. A leak will be released outside via hole, that ventilates the area between seals.
The only case when mentioned pumping can occurs is when ventilation channel is totally stuck - I can think abut self stuck, only by some one who wants to hide the failure.
To check the situation I recommend a zip tie (or sth. elastic) and go through the weep hole, it should go ~2" - take a look at channel routing.
If there is no leak form this area the pump is all right, no need to touch it.

Best regards,
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Rafal
K1100RS is a real beast (in Marrakesh Red)
K75S is a real beauty - she has gone Sad

, but not to far Smile

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simonlap · Posted: Mon Jul 18, 2011 12:51 pm Post subject:

well I got to thinking last night. Coolant in the oil, not the other way around. Coolant pressure at most 16 psi. Oil pressure going to important moving bits aboput 40 psi max. Most of the oil in the engine is under gravity to the sump. Unless I had some corrosion between water jacket and oilway in the block then the coolant had to enter a different route. There are no circumstances that allow expanding gasses in the cylinders to inject coolant into the oil without massive coolant loss and significant rise in sump pressure which would find it's way out via the rubber sump or cam cover gasket as these are only designed to contain oil under no pressure. They just stop your oil leaking over your garage floor. The only other place for cross contamination is therefore the oil/water pump area. BUT..... the weep hole is clear and dry. So I take the pump off after having to drill out two of the bolts in the most awkward position. Lo and behold, the orange 'O' ring is as dry as the Arizona sand and brittle. It snapped as i pulled the sealant off it after I took a photo. There I think is the answer. Im gonna put a new one in, fill her up and give it a whirl.

_________________
K1100rs 1992 model
F650 ST 1996 model
ride it like you stole it, fix it like it's your first girlfriend

Inge K. · Posted: Mon Jul 18, 2011 1:17 pm Post subject: