Three problems related to engine belts and pulleys have been reported for the 1998 Ford Expedition. The most recently reported issues are listed below.
While driving crankshaft/ pulley snapped off the motor. Lost all power to vehicle. After towing vehicle to mechanic, there was not a reason for crankshaft to snap.
Consumer states the engine has been replaced with a remanufactured engine 3 times once being due to a faulty connection rod, and an out of balance crankshaft, the serpentine belt, thermostat and gasket have also been replaced, also, the engine light was illuminating, dealer replaced spark plugs.
The air conditioning compressor broke. Due a defective bolt the belt slipped off, and the car stopped in the middle of the freeway. Also, the engine check light kept coming on. Upon notification of dealer, the mechanic stated that the light was on because of the belt slipping off. Repair work was done. The bolts were replaced, and the light still came on. The dealer cannot duplicate the problem.