Two problems related to engine oil leaking have been reported for the 1998 Ford Expedition. The most recently reported issues are listed below.
Dealership says oil leak due to engine block being mis-cast. Dealership recommends new engine to fix the problem. Heads could be replaced but problem would reoccur again. This problem has occurred in many engines and Ford is aware of this but is offering no help with the cost of replacement or recall on the engine to anyone but those who have Ford extended warranties. This is the original engine that was put in the truck. The defect has always been there and is not something that has occurred over time. Cost of new engine approximately $4,500.
Vehicle had been leaking oil since it was bought. But, dealer couldn't find where the leak was coming from.