Original 1986 [dated Revised August, 1986] Jeep Dealer 4.0/4.2L Six Cylinder Engine Component Service Manual. This Shop Manual is what the Dealer used to Service and Repair the 4.0L & 4.2L Engines in Jeep Cherokee, Wagoneer, Comanche YJ, Wrangler, CJ-7, Scrambler, Grand Wagoneer and Truck Models. It has Information, Specifications, Troubleshooting, Procedures and Illustrations to aid in the Repair of these Engines. It is in good condition with minor wear and soiling [see photos]. Very hard to find Dealer only item that will be a useful tool for the Jeep Owner.