Okay, let me first say that I've searched the forums and found out that: Milky oil WITH low coolant levels mean (obviously) that the coolant is somehow getting into the oil. *this is me* Unless the water pump weep hole is completely blocked, it's impossible for the source of coolant to be here without both seals being blown and seeing coolant/oil out the weep hole. Main suspects are the head gasket and the o-rings between the cylinder and case. *most probable so far, with my knowledge* SO, here's my condition....just picked up an '05 450 from a guy (at a very attractive price after finding these issues) and the oil is waaaay too full after running for 5 or so minutes and is a milky color (more greyish than white) and the coolant was low. The motor sounded fine, started well, and ran smooth with a slight power loss compared to my other one. What I am wondering is there any other component that could cause the coolant --> oil mix other than the head gasket and o-rings? While I have it apart, I plan on a new topend (I don't know how many hours are on it), including piston/rings/timing chain. Any other ideas, I'd like to have all the parts available when I tear into it. Thanks a bunch!!!