LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 1997 >> Legacy Outback Limited, Automatic >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> ENGINE MECHANICAL - 2.5L DOHC 4-Cylinder >> Engine Oiling >> Oil Pump >> Disassembly & Inspection

Disassembly & Inspection

  1. Disassemble pump. See Fig 1. Measure tip clearance of rotors. See OIL PUMP SPECIFICATIONS . If clearance is not as specified, replace rotors as a matched set.
    Fig 1: Identifying Oil Pump Components
    G91H02408Courtesy of SUBARU OF AMERICA, INC.
    OIL PUMP SPECIFICATIONS

    Application In. (mm)
    Inner Rotor-To-Pump Cover Side Clearance (1) .0008-.0028 (.020-.070)
    Inner Rotor Tip-To-Outer Rotor Clearance (2) .0016-.0055 (.040-.140)
    Outer Rotor-To-Case Clearance (3) .0039-.0069 (.100-.175)
    Relief Valve Spring (4)
    (1) Service limit is .0059" (.150 mm)
    (2) Service limit is .0071" (.180 mm).
    (3) Service limit is .0079" (.200 mm).
    (4) Information not available from manufacturer.
  2. Measure clearance between outer rotor and oil pump cylinder block rotor housing. If case clearance is not as specified, replace rotor. See OIL PUMP SPECIFICATIONS .
  3. Using a straightedge, measure clearance between oil pump inner rotor and pump cover. If clearance is not as specified, replace rotor or pump body. See OIL PUMP SPECIFICATIONS .
  4. Check oil relief valve and relief spring for wear and damage. Check oil pump case for worn shaft hole, clogged oil passage, worn rotor chamber and cracks. Check oil seal lips for deformation, hardening and wear. Replace components as necessary.
scientia non olet · About LEMON Manuals