My oil is actually slimy sludge K75 - Water eek what next?

[The Mighty Gryphon]

Have you checked the weep hole between the water and oil pumps?  I suppose it is possible that with a blocked cooling system pressure relief valve in the filler cap and a plugged weep hole coolant under high pressure in an overheating engine could feasibly push into the oil pump and then into the sump. 

Of the two scenarios I can envision, I hope that is the problem as it will be a lot less expensive to correct.

[bluebossa]

When I filled it up yesterday morning, I did notice lots of brown deposits on the water filler cap, it did seem all funked up, even though system was dry.. I took it to the kitchen and washed it up before refitting, didn't check to see that it was blocked though, as didn't know it was a thing... I haven't taken pump off.. what does the weep hole do?

Thanks again, helpful and here's hoping!

Have you checked the weep hole between the water and oil pumps?  I suppose it is possible that with a blocked cooling system pressure relief valve in the filler cap and a plugged weep hole coolant under high pressure in an overheating engine could feasibly push into the oil pump and then into the sump. 

Of the two scenarios I can envision, I hope that is the problem as it will be a lot less expensive to correct.

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[bluebossa]

Just tuning in, when Bike came back originally, then conked, I cleaned up 4 pin.. plus greased it back up...

Hey Johnny - what do you mean 4 Pin? Non comprendi?

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[Laitch]

what does the weep hole do?

The weep hole allows fluid that is bypassing seals to drip onto the underside of the pump or onto the pavement thereby indicating a leak in the pump system.

[bluebossa]

Just took cap off, still gunky... seems like gauze is blocked, maybe this is the culprit?

Pic attached...time for a new one?

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[The Mighty Gryphon]

How long has that red stuff been in there? 

Regardless of what else you might be doing on this bike, it sure looks to me like it's in desperate need of a cooling system flush.  If what the photo shows in the filler is in the radiator I would be surprised if the engine didn't overheat every time you started it.

About the cap.  An overnight in soak in vinegar would be a good start.

[bluebossa]

Just got my garage, sump off, water in via cap and straight out the bottom around the oil filter... into a catch tray

Lovely...

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[johnny]

greetings...

looks like somebody put dex in there which is a no no... that dex is prolly eating it alive from inside out...

j o

[Laitch]

Lift the tank and dump three liters of distilled water into the radiator. If it flows out of the crankcase, you're brilliant.

Just got my garage, sump off, water in via cap and straight out the bottom around the oil filter... into a catch tray

You're brilliant!

Any cracks or holes visible in the pump case? Did it flow quickly or trickle into the sump? Are the shaft seals tight or compromised? Is the impeller shaft loose? Have you looked up into the crankcase?

[bluebossa]

Not looked up into Crankcase but it flowed fast, through in seconds .. impeller shaft seams to move freely...

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[bluebossa]

greetings...

looks like somebody put dex in there which is a no no... that dex is prolly eating it alive from inside out...

j o

What's dex?

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[bizzaro]

So the water went straight to the oil pan! :mbird did some make it to the pump?  Man you must have a large crack/hole inside the engine somewhere.

Nice guys screw up too.. :nono.....Mighty Gryphon's analogy sadly may be accurate. And worse, they most likely will not own up to it.  I have never heard of letting a bike run idle for two hours? WTF,  :nono

[bluebossa]

Guess if I block the hose that goes to the pump and then fill it, might reveal more now pump is off... Still not quite sure what I'm looking at... As then water would go via crankcase?

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[stokester]

What's dex?

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DexCool is GM's long-life organic acid technology (OAT) coolant used in all GM products for almost two decades.  It is orange in color and looks almost pink in a surge tank or reservoir when diluted.  In the early days there was an issue where DexCool would react to the silicone gasket material on the plastic intake manifolds causing leaks.  The OAT technology is used in most all long-life coolants today and it is recommended that you NOT mix types.

I use Prestone long-life in my bricks.

[Laitch]

Guess if I block the hose that goes to the pump and then fill it, might reveal more now pump is off... Still not quite sure what I'm looking at... As then water would go via crankcase?

It'll take some inspection work for certain. Pour some distilled water via a funnel into the opening at the end of the channel to the right of the impeller.

[bluebossa]

It'll take some inspection work for certain. Pour some distilled water via a funnel into the opening at the end of the channel to the right of the impeller.

I blocked both side hose and the opening you mention. Poured water and came out of block above Oil filter in a flood... Guess that means cracked somewhere? as pump is off now... #knackered then

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[bluebossa]

DexCool is GM's long-life organic acid technology (OAT) coolant used in all GM products for almost two decades.  It is orange in color and looks almost pink in a surge tank or reservoir when diluted.  In the early days there was an issue where DexCool would react to the silicone gasket material on the plastic intake manifolds causing leaks.  The OAT technology is used in most all long-life coolants today and it is recommended that you NOT mix types.

I use Prestone long-life in my bricks.

Thanks, never come across it...

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[bluebossa]

Short update after leaving the problem for a while - I couldn't face it for a few weeks so just needed to leave it sulking in the Garage.. while I re-grouped. After weighing up a Donor Bike, or Selling or Engine I've decided..... drum roll...

I decided to source a second hand Engine and pressed the button this evening on a 53k 94 Engine - planning a full Engine swop and then take a further dig into where the crack, hole, whatever is in the existing unit after swopping it over...

Wish me luck - all tips on Engine changes welcomed - seen the Video on YouTube and looks straightforward enough... will keep you all updated, thanks for the support...

Anything to check or overhaul mid change also welcomed... Gear position indicator already on the list...

[beemuker]

Short update after leaving the problem for a while - I couldn't face it for a few weeks so just needed to leave it sulking in the Garage.. while I re-grouped. After weighing up a Donor Bike, or Selling or Engine I've decided..... drum roll...

I decided to source a second hand Engine and pressed the button this evening on a 53k 94 Engine - planning a full Engine swop and then take a further dig into where the crack, hole, whatever is in the existing unit after swopping it over...

Wish me luck - all tips on Engine changes welcomed - seen the Video on YouTube and looks straightforward enough... will keep you all updated, thanks for the support...

Anything to check or overhaul mid change also welcomed... Gear position indicator already on the list...

that seems the quickest and most cost effective way to go. I'm glad there are so many donor bricks around,

[Motorhobo]

Scud did a two-bricks-to-one project in which he swapped engines, among other things.

http://www.motobrick.com/index.php/topic,7638.0.html


I did a similar thing and put the engine from my first K75 (which had frame damage from a front-ender) onto Gary Weaver's infamous '94 K75 frame but most of it was repeating Scud's excellent thread so I didn't bother to document it. The downside of what you're doing is that you don't have the disassembly preceding the reassembly like Scud and I did. There are a lot of details that doing a tear-down first could help with. I recommend reading the Scud thread in its entirety.

BTW I built two engine dollies from plywood and 8 casters from Harbor Freight. The extra engine is still on the one dolly way in the corner of the garage. The other one currently has my sidecar tub while I work on the tug bike. You can never have too many dollies!

Good luck!