I have a 98 lin navigator the oil was changed a week ago then oil started showing in the radiator. no mater how many times i flush it out it would seep back. there is no oil water mix in engine and radiator is brand new. the oil filter to block gaskets have been changed also. help any ideas where the oil is coming from?

 

Any chance its transmission fluid and not engine oil? Was the radiator and oil filter adapter gaskets changed before this condition started or after the oil was first discovered in the radiator?

 

The radiator is new, the transmission lines have been by-passed to two aux coolers. It has less than120,000 miles on it and has never ran hot. All of this happened after a oil change.

 

So you have no coolant in the engine oil that is in the engine or at least that shows on the dipstick? If the coolant in the radiator has oil in it then you must have oil in the entire cooling system? Is the engine running ok with no smoking out the tailpipe? Where are you seeing the oil in the coolant, the degas bottle?

 

Oil is in the radiator and fill botel look like chocolate milk on bottom with a 1/4 inch of dark but trans fluid is clean and engine oil look like clear cooking oil no mix