Tick. Tick. Tick. That's the sound our Ford 4.0-liter, over-head valve (OHV) engine was making in our 1991 Ford Explorer after 250,000 miles. The Ford 4.0L V-6 engines, built in Germany, are found in ...

In the early '90s, Ford debuted the all-new Ford Explorer outfitted with the 4.0L V-6. Needless to say, with millions sold over the years, the Explorer has gone on to be one of Ford's biggest success ...