blown head gasket....not good.
Could b Transmission Fluid because the transmission cooler is in the radiator-especially IF the water has a red tint 2 it,IF it has a automatic transmission.
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.
Lack of coolant in the radiator. Fan not working. Not enough oil.
blown head gasket
It Could Be a Bad Gasket that causes water to mix with coolant more than likely you will see white dough like substance in radiator.
if this vehicle is automatic,the most likely cause would be the transmission fluid cooler. it is a tank inside the radiator that cools the transmission fluid. if by any reason the tank leaks it would contaminate your water/coolant/antifreeze. answer a cracked head will allow oil into water jacket in head, going from there thru to radiator if it was a bad head gasket, u would have water in oil instead
I would have to guess that your radiator has a hole in it. Look andd see if your transmission lines go to a tank on the radiator. If this is the case then the radiator will have to be replaced. You transmission line is leaking oil into the coolant. Is there also coolant in the transmission? This is the only way that I can see this happening. Now if you were just having coolant in the transmission then I would say that there was a head gasket issue. well I hope this helps you.
You may have a blown head gasket. Have it pressure tested. The head gasket keeps the cylinder head sealed from the water that circulates through the heads to keep them cool. If the gasket gets a hole in it, then there is a gap in which oil can get into your coolant. Make sure what you are seeing is OIL in the coolant first.
You are getting water into the coolant. Most likely cause is a failed radiator/oil cooler. If the coolant level keeps reducing and transmission oil level keeps increasing then the above answer is correct.
no oil in engine or water in radiator will cause engine to seriously o/heat! and eventually seize! major engine damage!!
The automatic transmission oil cooler is built into the radiator. If the oil cooler developes a leak the oil mixes with the engine coolant.
Oil and water do not mix. oil will float on top of coolant if you remove radiator cap this will be very visible, on the other hand coolant in oil will look milky white.
Pressurized oil lines go from the block through to the head. If the head gasket is leaking at that point and allowing a small amount of pressurized oil to seep between the line and the coolant jacket you could get oil in the radiator. Another possibility is that perhaps someone used water pump lubricant which is nothing more than an emulsified oil (oil blended with water). Over time the oil can separate from the coolant and that might be all you're seeing, especially if it isn't much oil. If it's RED oil it could be comming from the transmission cooler line. That runs through one of the radiator tanks and if the transmission line is leaking you could certainly get oil in the radiator... but it' would be red.