Three problems related to loud engine noise have been reported for the 1997 Ford Explorer. The most recently reported issues are listed below.
When starting up the car, a loud noise came from engine. My personal mechanic advised it was a timing chain. Ford towed it to the dealership and I found out that there was additional warranty coverage for this part. It was a failed timing chain guide. They are now in the process of reviewing it for Ford to pay for repairs. Entire engine may need replaced.
While driving at 50 mph heard a loud noise, and then saw smoke coming out of engine. Vehicle was totalled.
While driving vehicle heard a loud noise and vehicle stalled. Also, opened hood to check, and found a hole in engine block, size of a silver dollar. Consumer had gotten notices for camshaft guide and retentioner, but was not honored because vehicle had gone over the mileage. Contacted dealer, could find nothing, but did see metal shavings.