2002 Jeep Liberty Service Manual and 2.4L Gas Supplement (P/N 81-370-02060)

This two-volume factory PDF set covers 2002 and 2003 Jeep Liberty KJ vehicles, including the Liberty 4x2 and 4x4 left-hand-drive configurations and Cherokee 4x4 right-hand-drive configuration identified in the VIN tables. The 2002 file combines the service manual with the 2.4L Gas Supplement and identifies the base manual as P/N 81-370-02060. DaimlerChrysler prepared the material for professional automotive technicians involved in daily repair work; the procedures assume access to suitable lifting equipment, scan tools, pullers, presses, and precision measuring tools.

• 3,934 PDF pages in two files — 2002 Service Manual and 2.4L Gas Supplement: 1,791 pages; 2003 Service Manual: 2,143 pages.
• Engine diagnosis and repair covers the 2.4L DOHC gasoline engine and 3.7L V6, including compression and leakage tests, engine removal and installation, cylinder-head work, crankshaft and bearing inspection, oil-pump service, timing-system work, and 2.4L balance-shaft timing.
• Transmission and transfer-case service includes NV1500 and NV3550 manual transmissions, 45RFE automatic transmission coverage for 2002, 42RLE and 45RFE coverage for 2003, plus NV231 and NV242 transfer-case diagnosis, removal, disassembly, inspection, and reassembly.
• Axle and driveline overhaul addresses the 186FIA front axle, 2002 198RBI and Chrysler 8¼ rear axles, the 2003 Chrysler 8¼ rear axle, Trac-lok differentials, propeller shafts, half shafts, and inner and outer CV joints.
• Suspension, steering, and brake procedures include ball-joint and control-arm bushing replacement, ride-height measurement, caster/camber/toe adjustment, steering-system diagnosis, disc and drum service, ABS diagnosis, and brake bleeding.
• Electrical diagnosis is supported by system wiring diagrams, connector pinouts, splice and ground locations, circuit-testing procedures, module diagnosis, and PCM/SKIM and ignition-key programming.
• Vehicle-system repair extends to cooling, fuel and emissions controls, heating and air conditioning, restraints, body hardware, glass, lighting, power accessories, and instrument-cluster diagnosis.

Model-Year and Powertrain Scope

Powertrain selection matters when using this set. The 2002 transmission chapter centers on the NV1500, NV3550, and 45RFE, while the 2003 volume adds full 42RLE material alongside the 45RFE. Both years cover Command-Trac NV231 and Selec-Trac NV242 transfer cases. The VIN and vehicle-system sections also recognize the 2.5L diesel configuration and include related clutch, cooling, starting/charging, instrument, and wiring information; the internal engine overhaul chapters cover the 2.4L and 3.7L gasoline engines.

Drivetrain and Suspension Walkthrough

The axle chapters go beyond parts replacement. Factory procedures cover pinion-depth setup, bearing preload, ring-gear backlash, tooth-contact pattern analysis, shim selection, differential case setup, and Trac-lok assembly. Propeller-shaft material includes shaft-angle, runout, balance, and single-Cardan joint service, while the half-shaft section covers CV-joint and boot disassembly, inspection, and assembly.

For front-end complaints, the diagnostic charts separate front-end noise, wheel shimmy, vehicle instability, lead or drift, improper tracking, and excessive steering effort before directing the technician to the related inspection or alignment data. Transmission sections likewise include hydraulic pressure testing, clutch air checks, geartrain and valve-body service, adjustment procedures, and final operational checks. Brake and HVAC chapters add ABS bleeding, base-brake inspection, A/C performance testing, refrigerant recovery, evacuation, leak testing, and charging procedures.

Diagrams, Tools, and Specifications

Representative factory illustrations include C/V Components, Pinion Gear Depth Tools, Shim Locations, Geartrain and Shift Components, the 42RLE Valve Body - Exploded view, and Lubrication Oil Flow. Electrical coverage includes Power Distribution, Bus Communications, Fuel/Ignition, Transmission Control, and Antilock Brake diagrams, together with connector, splice, and ground-location views.

Special-tool callouts include Pinion Depth Set 6774, Dial Indicator C-3339, axle-housing spreader W-129-B, Ball Joint Press C-4212F, and wiring Special Tool Package 6807. The manuals supply component torque tables, fluid types and capacities, inspection and wear limits, clearance data, pressure-test specifications, alignment data, and electrical test values.

Factory Repair Cautions

The 2.4L is described as free-wheeling, but its camshafts must not be rotated independently after the timing belt is removed; valve-to-valve contact can still damage components. On the Chrysler 8¼ rear axle, backing off the pinion nut does not correct an over-crushed collapsible spacer—the spacer must be replaced—and reused ring-gear bolts can fracture.

Many procedures involve heavy drivetrain assemblies, loaded suspension parts, pressurized cooling or refrigerant systems, and supplemental restraints. The manual’s vehicle-support, pressure-release, refrigerant-recovery, and electrical-isolation precautions are part of the repair.