BMW X3 2005

Oil Pump



Check the oil pressure produced by the engine. The engine should be at normal operating temperature. If the oil quality and type or oil filter condition cannot be determined, replace the oil and filter before testing the oil pump and oil pressure.

  1. Start the engine and check the oil pressure at different engine speeds (RPM).
  3. The oil pump is capable of producing 7.4 psi at 700 RPM.
  5. If the oil pressure is low, remove oil pump and inspect:

    Oil pump case for cracks or damage or oil seepage
    Relief plunger for smooth operation
    Relief spring for deformation or a break

  7. Inspect the surface that mates with the oil filter for any damage.

Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions section.
  3. Drain the engine oil.
  5. Remove or disconnect the following:

    Negative battery cable
    Oil pan
    Oil pump sprocket wheel and chain
    If the oil pump is integrated with the oil scraper, remove oil pump with the scraper
    If the oil pump and scraper are two parts, remove oil pump intake pipe
    Oil pump

    Click image to see an enlarged view

    Fig. Showing oil pump mounting bolts



To install

  1. Check dowel sleeves for damage and correct installation position.
  3. Check the seals on the oil pipes and replace it if necessary. Lubricate the seals with oil.
  5. Check the seal in the oil pump and replace it if necessary.
  7. If the oil pum