ouch +1 for the coolant leak. probably cracked head gasket. Yank the heads and check it out. Have you done anything else to the motor lately? If something with the intake it could possibly be that you didn't set the gaskets right and it leaked through there. good luck
It's possible this guy took apart his motor and spilled some coolant in the motor during disassembly but it usually isn't milky white because it can't mix real well when it is standing. Looks like a headgasket leak to me or lower intake.
Don't mean to hijack the thread, but i am getting coolant in my oil, but the engine runs ok. I am about to rebuild the engine, any suggestions? I hope the head isn't cracked...TFS T/W 185 CNC $$$$$
Looks like coolant in your oil as others have stated. Probably blew the HG between a water jacket and an oil passage.
For others that have coolant in their oil get it fixed asap before driving the car. Straight water is bad enough since it reduces the oils ability to provide lubrication, coolant however is worse cause it can start to eat away at your bearings. So if its leaking get it fixed asap.