Will a Oil/Water Emulsion Freeze Up?

Posted by: George7941

Will a Oil/Water Emulsion Freeze Up? - 03/13/14 07:01 PM

Something is severely contaminating engine (Toyota 4Y) oil in our forklift at work. When I first saw the contamination I figured head gasket leak, so I had an oil sample analysed at a good lab, run by the large local CAT dealer. They found lots of water but no glycol.

So I have been checking various systems on the engine but keep coming back to an antifreeze to oil leak through a blown headgasket. I think the lab made an error and missed the glycol.

Today I transferred the drained contaminated oil from the engine from one container to another. It had been sitting outside with last night's temperature being -17C and today's daytime temperature being -8C. I noticed that there were no chunks of ice in the oil/water mixture. Should I conclude that this indicates antifreeze contamination and not water contamination?

The water is really mixed in with the oil. After a week of sitting motionless, there has been so separation whatsoever of water from the oil in the drained oil container.

I am going to try an experiment tonight and leave a mixture of oil and water outside and see if it ices up. The only problem is that I wont be able to mix the water into the oil as thoroughly as the engine did.
Posted by: spasm3

Re: Will a Oil/Water Emulsion Freeze Up? - 03/13/14 07:44 PM

Is the coolant level dropping in the forklift? That should tell you. Does the forklift get run enough to get good and hot?

I wonder if its a sodium add pack , could the water form an ionic bond with some of the sodium add and not freeze.
Posted by: George7941

Re: Will a Oil/Water Emulsion Freeze Up? - 03/13/14 08:00 PM

I can't tell yet if the coolant level is dropping.

Good thing you mentioned add pack, I was going to use some old power steering fluid in my overnight experiment but I should use some Rotella 15w40 which is what was in the engine.
Posted by: spasm3

Re: Will a Oil/Water Emulsion Freeze Up? - 03/13/14 08:06 PM

I looked up a uoa on rotella, not much sodium. I don't know if calcium would have a similar effect.
Posted by: George7941

Re: Will a Oil/Water Emulsion Freeze Up? - 03/13/14 08:50 PM

I just mixed up 4 parts Rotella 15w40 and one part water in a tomato can and stirred for five minutes with a screwdriver but it did not mix very well. I could still see globules of water. The can is in my shed overnight and I fully expect to see chunks of ice tomorrow morning but it is not going to prove anything because I could not mix it well enough.