Oil in water but no water in oil. 2004 F-350 6.0 diesel

you have to determine the reason for the seizure
check the following
remove injector and see if the engine turns over--hydraulic lock from water or diesel ( leaking injector)
remove the pump housing and check for a blockage --stone, stick etc --in the impeller stopping the engine from turning over
10w -30 is a light oil and I would be using 20w 40 diesel oil instead of the petrol oil you have used

Where are you finding this? Diesel and water would normally only mix if water was getting into the fuel tank. Are you sure it is diesel? If you are finding it in the coolant reservoir it is more likely to be engine oil. This usually suggests a blown head gasket.

Radiator is faulty , the oil cooling compartment has made a hole to the water section...

Hi, it sound like you drove your car without water or Oil. check if the car has water or oil, if you drove it without water your head will need to be checked and serviced, if you drove without oil you will need to redo the whole engine

check to see if you have a water leak into the sump
change over to diesel oil and change the oil filter every month for at least 6 months
diesel oil is the same as petrol engine oil but with a heavier detergent additive so it will clean out the sludge and deposit it in the filter

There is nothing that you can use to absorb the water that can get everywhere because the absorbent on the markets are not of the right viscosity to reduce friction while the engine is running. The engine has to be running to get the solution everywhere. For example WD 40 is actually water displacer. Can you use it for lube? NO, it is to light weight and too expensive, Another water absorber is alcohol (ethanol) but it is too light. The answer is to drain the oil that is present, change it and run the engine to operating temperature. This will heat everything to the boiling point of the water and it will turn to steam. Leave the engine fill cap for the oil off, and after running it for about 30 minutes, you should change the oil again. You can use diesel fuel in the oil if you want to attempt to flush any globes out that the water may have created but don't put more than 1qt of diesel fuel in the engine and make sure that the level is not too high. In other words if the engine takes 4 qts of oil, use 3 and add the diesel. Run it and 30 minutes later, drain it.

This is almost certainly due to a blown head gasket, which will have to be replaced. Oil and water systems will need to be flushed and refilled with clean oil and coolant

good day is this diesel engine or petrol?both tipes it may be the head gasket blown,causes overheating.on diesel it a posiblity that is can be the oil cooler mixing those 2 also.

Hi,
the diesel system on your vehicle works on a continous 'loop". Tank to engine....engine to tank. The fuel filters and the water separator are very susceptible to the diesel fuel 'clouding" , making the fuel heavier to push around the system. The 'clouding' is actually a type of wax which is normally held in suspension within the body of the fuel and thus is not a problem.

The wax starts to plug up the fuel system, and cause lots of problems. The fuel, being harder to push around the system, takes more pressure to move it. This will result in diesel leaqkage at any and all outlets to atmosphere at the pressure end.

The problem is usually resolved by adding an additive to the fuel tank, or having a water separator with a heater., There are also weap-around heating cables which can be fitted to fuel lines to aleviate the same problem. If your water separator has an automatic dump valve, you might like to check that it is functioning correctly and the water content is not freezing and providing an exit for the diesel fuel.

Good luck.

you could have a blown head gasket, have a compression check done to see if there is any low cylinders,

a head gasket failure does not always allow water to get into the oil, the failure point can also be between the water jacket and the cylinder bore