Oil in Coolant Reservoir A Symptom of Serious Engine Issues

Oil filter housing gasket is common failure point and can cause this - coolant runs through there. You should also change your oil when you do the gasket as ... If there's oil in the coolant reservoir it could be a head gasket. If you open the radiator cap with the engine cold is there oil present under it? There's evidence of oil residue in the coolant overflow tank in my 2012 Outback 3.6R. It has 150K miles, and has been dealer maintained. A blown head gasket allowing oil into the coolant would also allow coolant into the oil, causing a frothy or milky look. The mixture of coolant and oil reduces the efficiency of both fluids. This results in more friction and heat causing severe overheating and wear and tear to ... Yes, oil can leak into the cooling system but that does not mean coolant will necessarily simultaneously leak into the oil. For example, if you ... If you have oil in the coolant jug then you have a blown head gasket. Depending on if it's overheating your car is going to die. It seems that one of the aluminum heads developed a pinhole leak in one of the STEEL freeze plugs, which then leaked water into the crankcase ... The oil drops are suspended and floating in the coolant. Check your oil level next and look for white goo on the inside of the oil filler cap. Transmission fluid would be physically impossible. It has to be engine oil. Oil cooler replacement is the #1 suspect given the timing.