1999 Jeep Grand Cherokee WJ Service Manual (P/N 81-370-9118)

• Covers 1999 Jeep Grand Cherokee WJ models equipped with 4.0L and 4.7L V-8 gasoline engines, plus the 3.1L diesel engine
• Original OEM publication (Form No. 81-370-9118)
• Features 120+ diagnostic figures, exploded diagrams, and detailed torque tables for the 14-series fuel system and 11-series exhaust system
• Available as an instant download the moment your payment clears
• Fully searchable PDF format to locate exact part numbers and specs in seconds
• Provides the exact baseline specification data used for the WJ platform service procedures

Technical Scope and Documentation

Skip the generic manuals. This factory reference provides the exact baseline data needed to correctly maintain the WJ platform. It details critical maintenance intervals, mapping out both normal Schedule A and severe-service Schedule B requirements. You get the definitive specs for engine oil, coolant capacities, and transmission fluids, alongside complete diagnostic parameters for the Powertrain Control Module (PCM) and fuel delivery components. Always depressurize the fuel lines and observe standard shop safety protocols before servicing any high-pressure fuel components mentioned in this guide.

Specification and Data Highlights

Having the right torque numbers prevents snapped bolts and cracked housings. This manual covers exhaust manifold, catalytic converter, and muffler torque specs, detailing exact values like 31 Nm (23 ft. lbs.) or 61 Nm (45 ft. lbs.) depending on the specific connection. For the fuel system, it provides vital baseline reference values including the 49.2 psi operating pressure and exact injector resistance measurements. You will also find strict parameters for fuel pressure leak-down tests, verifying that system pressure does not drop below 30 psi for five minutes.