thick milky oil in crankcase

[osageII]

last year i re-sealed the engine in my 79 reinell. the old oil was ofcourse black and was then changed. after re-wiring the boat last year i finally got it started and had some timing problems. i put the boat away for the winter. this year i re-started the engine, to find that the thermostat was stuck closed. after jacking with that i found out my oil was milky. since the oil change, this engine has only been run maybe 1 hour total. the engine purrs like a kitten, doesn't smoke, steam, it's not hard to start. some ideas please. engine is a small block chevy, v-8. volvo penta set up. thanks..

 

[mrtim1]

Re: thick milky oil in crankcase

Well I don't know where you live but if you put it away for the winter and now the oil is milky the water in the block may have froze and you now have a cracked block.

 

[Fouled Plug]

Re: thick milky oil in crankcase

Could just be condensation caused the water in the oil. If the problem doesn't reoccur after an oil change and run-in, may be nothing to worry about. If you notice more gunk on the inside of the valve covers or in crank (also check heat exchanger if so equipped for goopy coolant) it could be a head gasket failed, or perhaps a cracked block. Depends on the climate where you are or if the motor was winterized correctly. Keep us posted!

 

[osageII]

Re: thick milky oil in crankcase

well, i did another oil change and ran the engine for about two minutes, and the crankcase filled up with water again. no heat exchanger on this one, the raw water never circulates back out of the motor. no water out of the exhaust. this sounds bad to me. the engine starts right up and runs smooth cracked block maybe?? i'm hoping for something easier like valves or something, what do you guys think???

 

[mrtim1]

Re: thick milky oil in crankcase

Ok from what I here this is a raw water cooled engine that is also not pumping water now (least of your problems).It sounds like you have a cracked block which means you need a new or rebuilt engine ,and being a volvo with the sea water pump mounted to the front of the crank when it froze it probbly pushed out the cover of the pump(the brass cover on the front of the pump that is held on with 4 screws) and that is why you are not pumping water .I can't see it being a ex. manifold or head gaskets because the water would first have to go into the cylinders and it would be hard to turn over ( if at all ) and by the amount of time it takes to turn the oil milky. I think it's time to pull the engine down. By the way where do you live?