Oil Contamination in Water Coolants A Diagnostic Journey Towards Resolution

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 ... GL 450 2007. It's still drivable. I just got an alert yesterday that coolant is low. Is this an expensive fix ? 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 oil cooler or areas where coolant and oil channel closely. Had oil in coolant once- was the oil cooler gone kaput. Was a different engine ... The oil always ends up in the overflow. It floats on the coolant, so it's the first to get pushed out into the expansion tank when the motor warms up. You can refill cooling system with a dishwasher detergent/water mixture (like Cascade) and run that for a few minutes, then drain and refill ... Oil in the coolant could just be a bad oil cooler. I had that a while back and a new cooler and gasket solved it. Give that a go before you ... Water is under pressure from the water pump whereas the oil is not as it is only draining. Hence water in oil but not vice versa and no exhaust ... The problem, in general, is that there is a leak between the lubrication system and the cooling system. There are only few obvious where this can happen. The only thing I would caution is the coolant would need to be flushed, probably with a dish washing detergent like cascade to get the oil out, ...