Here is our ranking of the four distinct Jeep Wrangler generations ... a crack-prone exhaust manifold, and substandard piston rings. These issues often limited the JK engine's operating life ...
like the Wrangler JK, which Jeep debuted in 2007. However, unlike Jeep's CJ designation, the letters JK do not appear to stand in for any two words in particular. Rather, the letters are merely an ...