GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Regal (China) 🢒 Engine 🢒 Engine Mechanical - 2.5L (LB8) and 3.0L (L46) 🢒 Oil Pump Disassemble

    Object Number: 5274 Size: SH
  1. Remove the oil pump driveshaft and oil pump driveshaft retainer.

    2. Object Number: 5275 Size: SH

    Important: DO NOT remove the oil pump screen from the pipe. The pipe and oil pump screen are serviced as a complete assembly.

  2. Remove the oil pump screen (if necessary).

    3. The oil pump screen has a press fit into the oil pump cover.


    Object Number: 5276 Size: SH
  3. Remove the oil pump cover bolts.

    4. Object Number: 5277 Size: SH
  4. Remove the oil pump cover.

    5. Object Number: 5278 Size: SH
  5. Remove the oil pump drive gear and the oil pump driven gear.
  6. Matchmark the gear teeth for assembly.

    7. Object Number: 30401 Size: SH

    Caution: Wear safety glasses in order to avoid eye damage.

    Caution: In some models, the pressure regulator valve spring is under pressure. Remove the retaining pin carefully in order to avoid bodily injury.

  7. Remove the following items:
    8. 7.1. The oil pump pressure relief valve spring straight pin.
    7.2. The oil pump pressure relief spring.

            Caution: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.

    7.3. The oil pump pressure relief valve. If the valve is stuck, soak the pump housing in cleaning solvent.