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Oil Pump Disassemble

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the fasteners (8) holding the pump housing halves (7, 1) together.
  2. Remove the inner (drive) and the outer (driven) rotors (5, 6) from the housing. Note the orientation of the pump rotors.
    Fig 1: Identifying Oil Pump Components
    G01815249Courtesy of GENERAL MOTORS CORP.
  3. The outer rotor has a dimple identifying its outer surface. The dimpled side of the outer rotor must always be facing outward.
    Fig 2: Identifying Outer Rotor Outer Surface
    G01815250Courtesy of GENERAL MOTORS CORP.
  4. Remove the oil pressure relief valve components (2-4) as follows:
    1. 4.1. Remove the threaded pressure relief valve cap (4).
    2. 4.2. Slide the pressure relief valve spring (3) and pressure relief valve piston (2) out of its bore.
    Fig 3: Identifying Oil Pump Components
    G01815251Courtesy of GENERAL MOTORS CORP.
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