GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Century 🢒 Engine 🢒 Engine Mechanical - 3.1L 🢒 Oil Pump Replacement

Removal Procedure
  1. Remove the oil pan. Refer to Oil Pan Replacement .

    2. Object Number: 190530 Size: SH
  2. Remove the oil pump bolt.
  3. Remove the oil pump and the oil pump driveshaft.
  4. Inspect the driveshaft at both ends for rounding of the corners.
  5. Inspect the oil pump. Refer to Oil Pump Cleaning and Inspection .

Installation Procedure

    Object Number: 190530 Size: SH

    Important: Rotate the driveshaft as necessary in order to obtain the engagement with the oil pump drive unit.

  1. Install the oil pump driveshaft and the oil pump.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the oil pump mounting bolt.

    3. Tighten
    Tighten the bolt to 41 N·m (30 lb ft).

  3. Install the oil pan. Refer to Oil Pan Replacement .