July 24, 2019April 21, 2020 What Breaks When: 5.9 24-Valve CumminsDiesel Performance Parts, Diesel Truck Maintenance, Dodge Cummins Written By: Lawrence "LT" Tolman From 1989 until 1998, the Dodge Ram pickups powered by the 5.9-liter Cummins 12-valve engine had a mechanica… read more.