Need help to diagnose engine trouble...

[Jacob 'Berg]

Originally Posted by 95jersey

We'll the problem is worse. Went to drain my oil and it looks like a shamrock shake. It is mint blue (color of my coolant) with the consistency of sludge/milk shake. Even with most of the oil drained my sight glass is still covered in sludge. Probably going to have to fill with Kerosene to get the sludge out. I imagine this is in my coolant system as well. so will need to drain and flush that. I could just explode right now in fury...

Obviously the coolant and oil mixed hence why I was overheating and the blue sludge. It can't be mixing at the head because there is no oil there, so the only other thing must be the water pump seals must be shot and allowed coolant/oil to mix.

Hopefully that is my only problem. Does my diagnosis sound correct?

Yes, sounds like water pump seal. Cheap and easy fix. Probably the over heating made the seal fail. I just had to replace the seal on my '05. I replaced the seal and then filled the tranny with cheap ATF. Ran the bike up and down the street at low RPM, drained the ATF, and filled with tranny oil. No residual coolant in the tranny at all.