GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC P42 Commercial Chassis 🢒 General Information 🢒 General Information 🢒 Oil Filter Adapter and Bypass Valve Assembly Replacement

Removal Procedure

    Object Number: 4554 Size: SH
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Position a suitable container in order to drain the engine oil.
  3. Disconnect the engine oil cooler pipes. Refer to Engine Oil Cooler Hose/Pipe Replacement .
  4. Remove the engine oil filter. Refer to Engine Oil and Oil Filter Replacement .
  5. Remove the oil filter adapter bolts.

    6. Object Number: 4559 Size: SH
  6. Remove the oil filter adapter and the oil filter adapter gasket.

    7. Object Number: 4556 Size: SH
  7. Remove the oil filter adapter seal (O-ring).

    8. Object Number: 4555 Size: SH
  8. Clean all sealing surfaces.
  9. Remove the oil filter bypass valve.
  10. Clean and inspect the oil filter bypass valve bore for damage.

Installation Procedure

    Object Number: 188023 Size: SH
  1. Install a new oil filter bypass valve.
    2. 1.1. Install the oil filter bypass valve into the oil gallery bore until slightly below flush with the surface of the engine block.
    1.2. Using a pointed punch, stake the engine block area around the oil filter bypass valve.

    Stake in 3 locations 120 degrees apart.


    Object Number: 4556 Size: SH
  2. Install a new oil filter adapter seal (O-ring) into the groove in the oil filter adapter.

    3. Object Number: 4555 Size: SH
  3. Install the oil filter adapter with a new oil filter adapter gasket.

    4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the oil filter adapter bolts.

    5. Tighten
    Tighten the oil filter adapter bolts to 21 N·m (15 lb ft).

  5. Install the engine oil filter. Refer to Engine Oil and Oil Filter Replacement .
  6. Connect the engine oil cooler pipes. Refer to Engine Oil Cooler Hose/Pipe Replacement in Engine Cooling.
  7. Lower the vehicle.