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Piston Ring Installation Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Properly orient the oil control ring expander as shown before installation. The ends of the expander must be facing toward the top of the piston.
    Fig 1: Aligning Oil Control Ring Expander
    G01815194Courtesy of GENERAL MOTORS CORP.
  2. Using a piston ring expander, install the oil control ring assembly using the following procedure:
    1. 2.1. Install the expander ring (3).
    2. 2.2. Install the two oil scraper rings (4). Expand the rings only enough to clear the piston diameter. Overexpanding the piston rings will distort or crack the rings.
    Fig 2: Installing Oil Control Ring Assembly
    G01815195Courtesy of GENERAL MOTORS CORP.
  3. Install the second and top piston rings using the piston ring expander. Ensure that you do not overexpand the rings.
    Fig 3: Installing Second & Top Piston Ring
    G01815196Courtesy of GENERAL MOTORS CORP.
  4. Once the rings are installed, set the ring gaps for the oil control, second and top ring as follows. Use the piston locating arrow for reference.
    1. 4.1. Lower oil control ring - position 1.
    2. 4.2. Upper oil control ring - position 2.
    3. 4.3. Top Ring - position 3.
    4. 4.4. Oil control ring expander - position 4.
    5. 4.5. Second ring - position 5.
    Fig 4: Setting Piston Ring Gaps
    G01815197Courtesy of GENERAL MOTORS CORP.
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