GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Optra 🢒 Engine 🢒 Engine Mechanical - 2.0L (L34 GMDAT) 🢒 Oil Pump Replacement

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1252146 Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the timing belt. Refer to Timing Belt Replacement .
  3. Remove the rear timing belt cover. Refer to Timing Belt Cover Replacement .
  4. Disconnect the oil pressure switch connector.

    5. Object Number: 1252150 Size: SH
  5. Remove the oil pan. Refer to Oil Pan Replacement .
  6. Remove the oil pump pickup tube and support the bracket bolts.
  7. Remove the oil pump pickup tube.

    8. Caution: Refer to Safety Glasses Caution in the Preface section.


    Object Number: 1252149 Size: SH
  8. Remove the oil pump retaining bolts.
  9. Carefully separate the oil pump and the gasket from the engine block and the oil pan.
  10. Remove the oil pump.

Installation Procedure

    Object Number: 1252149 Size: SH
  1. Apply LOCTITE® 242 to the oil pump bolts and RTV sealant to the new oil pump gasket.
  2. Install the gasket to the oil pump and install the oil pump to the engine block with the bolts.

    3. Tighten
    Tighten the oil pump retaining bolts to 10 N·m (89 lb in).


    Object Number: 1252151 Size: SH
  3. Install a new oil pump-to-cranshaft seal. Coat the lip of the seal with a thin coat of grease.

    4. Object Number: 1252150 Size: SH
  4. Coat the threads of the oil pump pickup tube and the support bracket bolts with LOCTITE® 242.
  5. Install the oil pump tube and the bolts.

    6. Tighten

        • Tighten the oil pump pickup tube bolts to 8 N·m (71 lb in).
        • Tighten the oil pump pickup tube support bracket bolt to 10 N·m (89 lb in).

    Object Number: 1252146 Size: SH
  6. Install the oil pan. Refer to Oil Pan Replacement .
  7. Connect the oil pressure switch connector.
  8. Install the rear timing belt cover. Refer to Timing Belt Cover Replacement .
  9. Install the timing belt. Refer to Timing Belt Replacement .
  10. Connect the negative battery cable.