GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC C-Series Medium Duty Truck B7 🢒 Engine 🢒 Engine Mechanical - 6.5L 🢒 Oil Filter Adapter and Bypass Valve Assembly Replacement

Removal Procedure

    Object Number: 69524 Size: SH
  1. Remove the oil filter from the engine block. Refer to Engine Oil and Oil Filter Replacement .
  2. Use a screwdriver in order to remove the oil filter bypass valve.
  3. Use the following steps in order to remove the oil cooler bypass valve:
    4. 3.1. Install a 4.8 mm (3/16 in) sheet metal screw into the hole in the cup plug.
    3.2. Use two heel bars in order to remove the cup plug.
    3.3. Use a slide hammer in order to remove the oil cooler bypass valve.
  4. Clean the recess in the block.

Installation Procedure

    Object Number: 59939 Size: SH
  1. Use the following steps in order to install the oil cooler bypass valve:

    2. • Use a socket in order to drive the bypass valve into the bore.
    • Drive in the bypass valve until it is seated on the shoulder in the bore.
  2. Install the cup plug for the oil cooler bypass valve.

    3. The cup plug has an orifice hole that prevents an air lock from occurring. An air lock will block the oil flow.

  3. Install the oil filter bypass valve. Use a socket to drive the oil filter bypass valve into the bore until it seats against the shoulder in the bore.
  4. Install the oil filter on the engine block. Refer to Engine Oil and Oil Filter Replacement .