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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Mechanical - 3.6L (Ly7) (Repair Procedures -- 3 Of 5)) >> Off-Vehicle Repair Instructions - Part 2 >> Piston and Connecting Rod Assemble >> Piston Ring Installation Procedure

Piston Ring Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Oil Control Ring Installed Position
    GM240809Courtesy of GENERAL MOTORS CORP.
  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.
    2. Fig 2: Identifying Piston Rings
    GM1316533Courtesy of GENERAL MOTORS CORP.
  2. Using a piston ring expander, install the oil control ring assembly using the following procedure:
    1. Install the expander ring (3).
    2. Install the 2 oil scraper rings (4). Expand the rings only enough to clear the piston diameter. Overexpanding the piston rings will distort or crack the rings.
    3. Fig 3: Expanding Piston Rings
    GM1316504Courtesy of GENERAL MOTORS CORP.
  3. Install the second and top piston rings using the ring expander. Ensure that you do not overexpand the rings.
    4. Fig 4: Identifying Piston Ring Gaps
    GM316688Courtesy 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 location arrow for reference.
    1. Lower oil control ring - position 1
    2. Upper oil control ring - position 2
    3. Top Ring - position 3
    4. Oil control ring expander - position 4
    5. Second ring - position 5
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