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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (Engine Mechanical - 3.6L (LF4) - Repair Instructions (3 Of 4)) >> Repair Instructions >> Piston and Connecting Rod Overhaul >> Assemble Procedure

Assemble Procedure

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  1. GM1210818
    NOTE:
    • The piston is directional and must be installed in the engine block in the proper direction. The dot on the top of the piston must face the front of the engine.
    • The piston is model dependent and may not appear exactly as shown.

    Lubricate the piston pin bores in the piston (1) and the connecting rod (2) with prelube lubricant. Adhesives, Fluids, Lubricants, and Sealers

  2. GM1210796

    Assemble the piston (3) and piston pin (2) to the connecting rod (4). Properly orient the piston when reusing a marked connecting rod.

  3. Align the piston pin bore with the connecting rod pin bore.
  4. Slide the piston pin (2) into the piston (3) and the connecting rod (4).
    5. NOTE:

    New piston pin retainers must be used. Never reuse the piston pin retainers.

  5. Install NEW piston pin retainers (1) using the EN-46745  Piston Pin Clip Remover/Installer. Align the EN-46745  Piston Pin Clip Remover/Installer to the notch in the piston.
  6. GM1467767

    Ensure that the piston pin retainers (1) are fully seated in their grooves.

  7. Repeat these procedures for the remaining pistons.
  8. GM5366804

    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.

  9. GM1316533

    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.
    10. NOTE:

    The lower compression piston ring (2) is thicker and will not fit in the upper compression rings (1) position.

  10. Install the lower compression piston ring (2) onto the piston with the mark facing the top of the piston.
  11. Install the upper compression piston ring (1) onto the piston with the mark facing the top of the piston, if required.
  12. GM5366806

    Once the rings are installed, set the ring gaps for the piston rings as follows. Use the piston location arrow for reference.

    1. Piston Compression Lower Ring (1) 30 degrees
    2. Piston Compression Upper Ring (2) 30 degrees
    3. Piston Oil Ring Rail- Upper (3)
    4. Piston Oil Ring Rail Spacer (4)
    5. Piston Oil Ring Rail- Lower (5)
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