I have this 900x side by side that had been submerged completely in water. over the past year i have been plugging away at it fixing this and that. i have it running and drove it around a little bit and now there is water in the oil. I changed the oil and ran it for a few minutes and it gets gray white mix that quick. during my short road tests the engine did not overheat. my questions; do the cylinder heads have a history of cracking or warping or is this a replace the head gasket type job? is there a history of the blocks on these engines cracking? the thing runs pretty good except for the emulsified oil. thank you in advance for your help