emulsified engine oil

[overdrawn]

hoorah
just as the fine weather is here my boat with twin 3.0 mercruisers goes wrong BAH !!!!!!!
engine oil is turning milky,but no loss of coolant on the fresh water side or mayonaise in the coolant header tank,most common suggestion is rotten manifold but i dont see how water is getting into the oil from there. surely the thing would hydraulic
HELP /forums/images/graemlins/confused.gif

 

[hlb]

You got water in the oil. It wont hydraulic, less gallons appeared. More likely to Seize up first anyway.

 

[overdrawn]

/forums/images/graemlins/smile.gif thanks i realise that,whats confusing is where did it come from as there is no coolant loss

 

[shetland536]

might be simple!
running ok,coolant level constant.
condensation maybe,may occur with short journeys but should dissapear after a decent run.oil level should return to normal.thats with bike motors anyway,good luck,look on the bright side!

 

[overdrawn]

nice cheery thought ta,unfortunately the port motor is fine and i dont do short runs thanks tho

 

[pelicanpete]

Could be blown head gasket. Water leaks into the oil keeping the apparent oil level correct and oil passes into the water jacket. No loss of fluids but you get emulsified gunge.

 

[chuckaduck]

is it both engines or one ?

 

[cortez]

Although you say your coolant level appears ok, your exhaust manifold/risers are sea water cooled, I think you may need to replace manifold/risers/riser to manifold gasket.

 

[overdrawn]

just the stb one

 

[overdrawn]

i agree,but i dont understand how the water is getting into the oil rather than the cylinders as there are no oilways in that area

 

[LittleShip]

The oil cooler could be the problem,
Do you get any oil from the exhaust?
When the engine is turned off and the oil pressure drops the water can then get into the oil ways and emulsify the oil. Remove the oil heat exchanger and have it checked, they should be considered consumables and replaced approx every 3-4 years.
It will be raw water that is in the engine so you will need to give it a good flush through with flushing oil and then change the filters. With luck you shouldn’t have any long term damage. /forums/images/graemlins/smile.gif

Experience talking here. /forums/images/graemlins/crazy.gif

Tom

 

[qetoo]

That happened to me when the exhaust manifolds rusted through.
Mine are sea water cooled, even though the engine block has a closed fresh-water cooling system.

 

[chuckaduck]

then it is definitley head gasket or worse but unlikely to be worse pop the head off and you will find out

 

[overdrawn]

Spot on cortez,manifold and riser absoloutely rotten as pears. so will need to do the port engine as well no doubt. Acronym for boat BRING OUT ANOTHER THOUSAND /forums/images/graemlins/crazy.gifAnd thanks everyone for your thoughts now where did i put that new interest free card /forums/images/graemlins/smile.gif