The engine first appeared in the 1987 XJ Cherokee and ... of almost two decades, Jeep's 4.0 liter straight six engine had good and bad years, separated primarily by an upgrade to the multi-port ...

For its first two years, the only engine options in the Cherokee ... Jeep models and enjoy plentiful supplies of rebuild kits, salvage yard replacements, and aftermarket upgrades. XJ Cherokees ...