I have a friend who has a 2001 expedition 5.4L 2WD and he told me that there was a milky substance inside the reservoir where you put the coolant in. My first assumption was that it needs a new radiator. Would an OEM radiator have a heat exchanger? Could it be transmission fluid? Could it also be a blown head gasket? How can I eliminate one of these so that i give a precise diagnostic? Are there any tests i can do to the radiator?

 

Wrong forum...This is the Excursion forum...

 

Moved to the 5.4L engine forum.

Stewart

 

did you check the oil? see if its milky. my money is on head gasket.