

Ford 4.0L OHV V-6 Valvetrain Clatter Issue

It was time to bench our Explorer from future trips until we could address them with an engine rebuild. There are a few common problems associated with Ford 4.0L OHV V-6 engines though and we were seeing signs of them, namely valvetrain clatter and coolant consumption. With proper maintenance, these Ford 4.0L OHV V-6 engines are reliable and ours had powered us on many adventures deep into the backwoods and desert without any worries. The Ford 4.0L V-6 engines, built in Germany, are found in Ford Explorers and Rangers through the year 2000 when production of the OHV engine stopped and the concurrent 4.0-litre SOHC engine took over. 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.
