The cylinder on the left side (clutch, shifter, kick-stand, I think it's #1, but I forget which way they're numbered) is completely flooded with oil.

Past history of the bike: It's a 2000 CBR 600 F4, about 6000 miles on it. Bought it really cheap as a project for the summer, kid had wadded it up years agoand wrecked the plastics, radiator, headers, muffler, forks and front rim. The bike had been sitting for 2 years before I got it, when I first got it I drained the fluids, coolant was a little murky, but didn't look like oil in it, just looked dirty. The oil had a very small amount of water that drained out first (Less thana quarter of a cup, barely noticed it come out), but I figured that could just be from the bike sitting for 2 years without moving, condensation or leaking seals or something.

I was trying to start it the other day, filled it with fresh coolant and Mobil1 15w50,it cranked over a couple times and wouldn't start.I let it sit for a few minutes, fuel pump was priming, I assumed it just needed a little time. I tried again and the starter wouldn't turn over. Pulled the plugs and that plug was dripping with oil, oil dripping out the exhaust port and down the header pipe,oil everywhere. Cranked it over with plugs out to blow the oil out. Let it sit, and oil eventually flooded in there again.

Next I undid the oil pan drain bolt, and water started gushing out. Tightened it back down real quick and drained my coolant, not a drop of oil in the coolant, still looked brand new. Undid the oil drain bolt again and let all the coolant out (there was a LOT). Eventually got to the oil, obviously the oil was very murky as it had been swished around with coolant from trying to start the engine. Drained all my fluids out and that's how the bike is sitting now.

I can't imagine anything being too terribly wrong, as the bike still does turn over, starter works, tranny is fine, etc. The engine had absolutely no damage to it from the crash, there was a little bit of rash on the stator cover, but that's all. Time between filling the coolant and then draining it all back out of the oil pan was less than an hour, the coolant has to be GUSHING out of something to get there, not just a little leak past a seal or something.

Now my question:
What ways could that much coolant get into the oil pan?

These are my thoughts on it:
Bike sitting for so long maybe the coolant seperated, water froze, something inside split, coolant now leaks into oil pan?
Headgasket is screwed, coolant is going right through it straight into the crankcase and settling into the oil pan?
Oil cooler is cracked, coolant being heavier then oil just flows right through it and into the bottom of the oil pan?
I'm no expert, most of my experience is with Japanese cars, not Japanese bikes, those 3 things are the only thing that came to mind without being able to look inside the engine, does anyone have any thoughts on it? How it happened, what can be done to fix it, how it can be prevented from happening again?

Tomorrow I might try filling the radiator up with water with the oil pan drain bolt out, and see if the water goes straight in and right back out, or if it takes time to leak, or if it only gets in there when the engine is turning over. So if anyone has any internal insight as to how/why this is happening, let me know.

Thanks in advance!
(Here'sa picture of what shape the bike is in now)

 

1st things 1st, get the bike compression tested, as this will pretty quickly give you an indicator, I'm from the old school & reckon that you have a blown head gasket, as the symptoms pretty much match that. Good luck

 

yup. compression test first. blown headgasket will be VERY obvious.

 

Alright, I'll do a compression test today. From the manual it looks like pressure should be 178psi, would I be looking for a drop across all cylinders? Or just one cylinder thats way under the rest?

 

Alright, first the cylinder order was as I guessed, 1,2,3,4 with 1 being left (shifter) and 4 being right (rear brake).

Compression results (Cranked over until compression stopped increasing):
1: 50psi
2: 175psi
3: 100psi
4: 110psi

Before I started the engine was sitting with cylinder 1's intake open. During the test cylinder 3 blew a lot of coolant mixed with oil out the exhaust, and cylinder 4 also blew coolant/oil but less of it. Those 2 cylinders also had coolant floating up the intake ports about 1/8 of an inch deep above the lifter.

I'm guessing this means either the heads are screwed, or the headgasket is toasted. I think its interesting that cylinder 2 was so close to perfect though, manual states that compression should be 178. Could that be a sign that something is bad with that cylinder? ie lots of gunk stuck to piston causing what would have been another 50-100 reading to shoot up to 175?

I'm going to drop the engine out as soon as I can, but the weather is supposed to be real bad for the next 2 days so I probably won't get to it until Thursday.
Stay tuned, and I'm still open to any suggestions anyone might have in case I misdiagnosed this one.

 

well you could use a leakdown tester to guage where the airs going but i think that would be irrelevant....is it coolant in there originally, or did young stunna just go with water and wetter????....if so that spells disaster in the cold....

 

I believe I found the problem:




Poured some water in and it seeped right through. No doubt that would cause a problem when it's pressurized! Continuing my search for how it ended up in the cylinders, but I think I have a good lead on that.

 

yeah dude that looks like the heads(valve and keepers showin) right?....i could only guess full water in cooling sys and left out in cold for a long time and a deep freeze