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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 - On Vehicle >> Cylinder Head Replacement - Left Side >> Installation Procedure

Installation Procedure

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.
WARNING:

Wear safety glasses in order to avoid eye damage.

CAUTION:

Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.

NOTE:

If installing a new cylinder head it is necessary to install a new engine coolant air bleed plug into the rear coolant passage of the cylinder head. Cylinder Head Assemble 

NOTE:
  • Do not reuse the cylinder head bolts. Install NEW cylinder head bolts during assembly.
  • Do not use any type of sealant on the cylinder head gasket (unless specified).
  • The cylinder head gaskets must be installed in the proper direction and position.
  1. GM63235Courtesy of GENERAL MOTORS COMPANY

    Clean the engine block cylinder head bolt holes (if required).

    Thread repair tool J 42385-107, found in J 42385-200  Thread Repair Kit may be used to clean the threads of old threadlocking material.

  2. Spray cleaner into the holes. Refer to Adhesives, Fluids, Lubricants, and Sealers  for the correct part number.
  3. Clean the cylinder head bolt holes with compressed air.
  4. Check the cylinder head locating pins for proper installation.
  5. GM1332950Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    When properly installed, the tab on the left cylinder head gasket will be located left of center or closer to the front of the engine.

    Inspect the displacement markings (1) on the gasket for proper usage.

  6. GM63169Courtesy of GENERAL MOTORS COMPANY

    Install the NEW left cylinder head gasket onto the locating pins.

  7. GM1424500Courtesy of GENERAL MOTORS COMPANY

    Install the cylinder head onto the locating pins and gasket.

  8. Install the NEW cylinder head bolts.
  9. Fig 1: Cylinder Head Bolt Tightening Sequence
    GM260150Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Tighten the cylinder head bolts.

    1. Tighten the M11 cylinder head bolts (1, 10) a first pass in sequence to 30 N.m (22 lb ft).
    2. Tighten the M11 cylinder head bolts (1, 10) a second pass in sequence to 90 degrees using J 45059  Angle Meter.
    3. Tighten the M11 cylinder head bolts (1, 10) a final pass in sequence to 70 degrees using J 45059  Angle Meter.
    4. Tighten the M8 cylinder head bolts (11, 15) to 30 N.m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.
  10. GM5165026Courtesy of GENERAL MOTORS COMPANY

    Install the battery negative cable ground (2) and the battery negative cable ground bolt (1) and tighten bolt to 40N.m (30 lb ft).

  11. Install the pushrods. Valve Rocker Arm and Push Rod Replacement 
  12. Install the left exhaust manifold. Exhaust Manifold Replacement - Left Side (L96, LC8)
  13. Install the coolant air bleed pipe. Engine Coolant Air Bleed Pipe Replacement (L96, LC8)
  14. Install the engine cover. Engine Cover Replacement
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