On my ford fiesta there's oil in water tank but no water in the oil wot does this mean?
On my ford fiesta there's oil in water tank but no water in the oil wot does this mean?
It likely means that you have a head gasket fault or a crack or porosity in the block or head. With the fiesta the most likely cause will be head gasket. You don't necessarily get water in the oil as the pressure that the oil is under is higher meaning it flows one way. Also small amounts of water in oil boil off and get breathed into engine.
If you have had a head gasket done recently it could be they haven't cleaned out the water system properly, if this is a possibility I advise getting the coolant flushed and replaced first but if not then I think you need a new gasket.
The head gasket has blown. There are inumerable places where this can happen and in this case it is between an area with oil and the coolant so blowing oil one way into the water coolant.
Ask a Ford dealer to pressure test the transmission cooler on the right hand side of the radiator end tank. If the transmission cooler is leaking *transmission fluid is leaking into the coolant.
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