mechanic checked and said it could be caused by the therostat housing is this possible and how to id and repair
i have oil in my coolant , where could it be comeing from on 1991 Ford Ranger
seek a 2nd opinion. did you over heat trk at all?
1 more answer
check to see if you have oil cooler lines going into the radiator. if so, the radiator may be damaged and need replacement.