Blown head gasket - warpped head - or both.
well, check your oil, engine coolant, and your radiator.
The automatic transmission oil cooler is built into the radiator. If the oil cooler developes a leak the oil mixes with the engine coolant.
When mixed with coolant in the radiator it tends to look like a chocolate milkshake.
An oil cooler works the same as a radiator that cools coolant
check oil for water and radiator for oil, if engine oil has water miced with it ,the oil will be milky looking same does for radiator
Does it have a oil cooler on the engine ?? If it does then oil runs through tubes that are inside of the radiator to cool the oil, and the tubes are leaking oil into the engine coolant. REPLACE RADIATOR. Really need to know what you are working on. Engine size and year. It could verywell be something else. Let us know NEUTZ.
blown head gasket
Oil is not a coolant, it is a lubricant, but it keeps the engine lubricated to prevent friction, which reduces heat and makes is run cooler. Water in the radiator, and the radiator fan, is what keeps the engine cool.
An oil coolant?æ hose is a tube or pipe that allows engine oil to circulate via the radiator in order to cool down. Without an oil coolant hose, oil will get to hot to operate efficiently.
You did not say what you are working on, YEAR AND ENGINE SIZE. But in most cases or designs the water pump can not leak oil into the coolant. The water pump has nothing to do with the engine oil. Does the engine have a engine oil cooler on it ? That would be 2 oil lines just above the oil filter that runs down the side of the engine oil pan a go to the radiator. There are tubes inside of the radiator that oil flows through and they are none to leak oil into the engine coolant that's inside of the RADIATOR. If they are leaking then REPLACE RADIATOR. BUT like I said I don't know what you are working on. Would like to help you with your problem, But need more INFO. NEUTZ.
Does it have 2 lines coming from the top of the oil filter, and going to the radiator. If so that is the oil cooler. You need to replace the RADIATOR Those 2 lines go into the radiator so it can cool the oil, and the tubes are leaking oil into the coolant.
There are two possibilities, one it is most likely the automatic transmission cooler( in the radiator) is leaking transmission fluid. The other, engine is oil entering the cooling system through a leaking headgasket, cracked cylinderhead or engine block.Keep in mind that the engine oil pressure( normally) is allways higher than that of the coolant system , when engine is running.It is rare but possible that engine oil @ say 40 p.s.i. is entering the coolant system, but when the engine is shut off the coolant system pressure is not high enough to leak into the engine oil .It is not uncommon for(in radiator) transmission coolers to leak oil into the coolant system.