One problem related to engine head gasket leaking has been reported for the 1998 Ford E-150. The most recently reported issues are listed below.
Lost 2 cylinders on 4. 6l, 0 compression wet or dry. No overheat issues. Mechanic didnt look for leaky head gasket, which must have been the cause. Mechanic said drive home, I drove home more damage insued. Engine replaced at my expense. Extended warranty. Purchased at time of purchase rejected coverage. Ford no help, dealer no help. Im out $6,200.