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The water reservor has engine oil

(1999 Ford Expedition)
in Compton, CA on March 08, 2013
3 months ago we did one side head gasket becouse water inside oil but now i have oil inside the water reservor 1999 ford expedition 4x4 5.4l
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Popular Answer
on March 08, 2013
Engine oil or transmission fluid? Radiator contains the trans. cooler and may be defective. Not sure but could have oil cooler in radiator as well in any event check or have rad. checked first!!
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on March 09, 2013
could it be possible residual from head job try to flush coolant ,clean bottle for overflow and see if it returns
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on March 09, 2013
Good idea!!
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