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Oil Pump

  1. Check clearance between lobes of rotor with a feeler gauge. If clearance exceeds 0.010" (0.25 mm), replace both rotors.
  2. Inspect clearance between outer rotor and pump body, using a feeler gauge. Maximum clearance is 0.012" (0.30 mm)
  3. To check rotor ends, place a straightedge across pump body and measure clearance rotor and straightedge, using a feeler gauge. Then place straightedge across cover and measure clearance between straightedge and cover.
    Fig 1: 1970 cc Oil Pump Assembly
    G09359787Courtesy of MAZDA MOTORS CORP.
    Fig 2: 1415 cc Oil Pump Assembly
    G09359788Courtesy of MAZDA MOTORS CORP.
    OIL PUMP SPECIFICATIONS

    Application Clearance In. (mm)
    Rotor-to-Rotor .002-.006 (.051-.052)
    Rotor-to-Body .006-.010 (.152-.254)
    End play .002-.004 (.051-.102)
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