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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Engine Mechanical - 6.0L (L96 LC8)) >> Repair Instructions - Off Vehicle >> Cylinder Head Assemble

Cylinder Head Assemble

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools 

J-8062  Valve Spring Compressor - Head Off

Equivalent regional tools: Special Tools 

  1. GM1559870Courtesy of GENERAL MOTORS COMPANY

    Clean the cylinder head valve spring shim area.

    2. NOTE:

    When using the valves and related components again, install the parts to their original location.

  2. Install the valves (228) into the proper port. Separating Parts 
  3. Install a NEW valve stem oil seal (222).
  4. Install the valve spring (223).
  5. Install the valve spring cap (224).
  6. GM260151Courtesy of GENERAL MOTORS COMPANY

    Using the J-8062  spring compressor, compress the valve spring.

  7. Install the valve stem keys.
    1. Use grease in order to hold the keys in place and remove the J-8062  spring compressor.
    2. Ensure the keys seat properly in the groove of the valve stem.
    3. Tap the end of the valve stem with a plastic face hammer to seat the keys, if necessary.
  8. GM64315Courtesy of GENERAL MOTORS COMPANY

    After installation, measure the valve spring installed height.

    Measure from the base of the valve spring to the top of the valve spring. If the spring installed height is not within specification, the valve and/or cylinder head must be replaced. Engine Mechanical Specifications (LC8 VIN B) , or Engine Mechanical Specifications (L96 VIN G) 

  9. Install the remaining valves, springs, and other components.
  10. GM1559875Courtesy of GENERAL MOTORS COMPANY

    Install sealant to the threads of the coolant temperature sensor (725). Adhesives, Fluids, Lubricants, and Sealers 

    11. CAUTION:

    Refer to Fastener Caution

  11. Install the coolant temperature sensor into the left cylinder head and tighten to 20 N.m (15 lb ft).
  12. GM1559878Courtesy of GENERAL MOTORS COMPANY

    Install sealant to the threads of the cylinder head plug (229). Adhesives, Fluids, Lubricants, and Sealers 

  13. Install the cylinder head plug to the right cylinder head and tighten to 20 N.m (15 lb ft).
  14. GM1559873Courtesy of GENERAL MOTORS COMPANY

    Apply threadlock to the sides of the cylinder head plugs (216). Adhesives, Fluids, Lubricants, and Sealers 

  15. Install the cylinder head plugs into the cylinder head.

    A properly installed plug should be installed 2.5 mm (0.1 in) below the end face of the head.

  16. GM2215304Courtesy of GENERAL MOTORS COMPANY

    Install the rivet plug (1) into a rivet gun.

  17. GM2202713Courtesy of GENERAL MOTORS COMPANY

    Insert the rivet into the coolant passage of the cylinder head.

  18. Squeezing the handle of the tool, install the rivet.
  19. GM2046466Courtesy of GENERAL MOTORS COMPANY

    Inspect for proper installation of the rivet (1).

    A properly installed plug should be installed flush with the surface of the head.

  20. GM1408862Courtesy of GENERAL MOTORS COMPANY

    Installation of the first design coolant air bleed cover (313) and bolt (312) may be used instead of the rivet plug to complete the repair. Tighten the coolant air bleed bolts to 12 N.m (106 lb in).

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