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Home >> Jeep >> 1987 >> Cherokee Limited >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 4.0L 6-CYL - VIN [M] & 4.2L 6-CYL - VIN [C] >> Lubrication >> Oil Pump >> Reassembly & Installation

Reassembly & Installation

  1. If removed, install oil pressure relief valve, spring, retainer and cotter pin. See Fig 1. Apply light film of non-hardening sealing compound around end of tube and press fit tube to pump body. Ensure tube support bracket is aligned with bolt hole in pump body.
    Fig 1: Oil Pump and Filter Assembly
    G91532Courtesy of AMERICAN MOTORS/JEEP CORP.
  2. Install idler shaft, idler gear and drive gear into pump body. Prime pump by filling pump cavity with petroleum jelly. Do not use grease. Apply sealer around perimeter of pump cover. Install and tighten pump cover. Using new gasket, install and tighten oil pump. Install oil pan and refill crankcase.
OIL PUMP SPECIFICATIONS

Application In. (mm)
Gear-to-Body Clearance .002-.004 (.05-.10)
Gear End Clearance .004-.008 (.10-.20)