Conquering Oil-in-Water Coolant Challenges A Practical Approach

GL 450 2007. It's still drivable. I just got an alert yesterday that coolant is low. Is this an expensive fix ? Coolant and oil mixing is a bad sign. This is because it usually points towards the failure of an important part in your engine/cooling system. An oil/coolant ... Contamination between oil and coolant could be caused by a faulty oil cooler, turbo, cracked head, or faulty head gasket. Overheated now coolant in oil. Help ... Most likely the seal in the water pump that separates the oil from the coolant has failed. Not a big deal. Fill it up in the radiator and run the car for a few days. Then drain the coolant. Fill with just distilled water. Run for another few days. 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 ... Why is there oil in my coolant? ... The presence of oil in a vehicle's engine coolant can be an indication that oil from the oil circulatory ... Check your transmission dipstick for possible coolant contamination, also. That "film of oil" in your coolant overflow tank may not be that much ... Unless someone put oil in your coolant reservoir it's not likely an accident. There are several things it could be, none of them good. A mechanic told me that it could only be from a leaking head gasket. I'd like to rule out the possibilities that it could be oil leaking into ...