GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2008 🢒 H3 🢒 Engine 🢒 Engine Mechanical - 3.7L 🢒 Oil Pump Replacement

Removal Procedure
  1. Remove the engine front cover. Refer to Engine Front Cover Replacement .

    2. Object Number: 659575 Size: SH
  2. Remove the oil pump cover bolts.
  3. Remove the oil pump cover.
  4. Mark the inner and the outer gears in relation to the oil pump housing.
  5. Remove the inner and the outer oil pump gears.
  6. Remove the oil pump pressure relief valve plug.
  7. Remove the oil pump pressure relief valve and the spring.
  8. Clean and inspect the oil pump. Refer to Oil Pump Cleaning and Inspection .

Installation Procedure

    Object Number: 659575 Size: SH
  1. Install the oil pump pressure relief valve and the spring.

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

  2. Install the oil pump pressure relief valve plug.

    3. Tighten
    Tighten the plug to 14 N·m (124 lb in).

  3. Install the oil pump outer and inner gears as removed.
  4. Install the oil pump cover.

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

  5. Install the oil pump cover bolts.

    6. Tighten
    Tighten the bolts to 10 N·m (89 lb in).

  6. Install the engine front cover. Refer to Engine Front Cover Replacement .