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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> ENGINE MECHANICAL - 4.8L, 5.3L, AND 6.0L (2 Of 4) >> On-Vehicle Repair Instructions >> Cylinder Head Replacement - Left >> Installation Procedure

Installation Procedure

CAUTION: Wear safety glasses in order to avoid eye damage.
NOTE: 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.
IMPORTANT:
  • 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. Clean the engine block cylinder head bolt holes (if required).
    Fig 1: Checking Cylinder Head Bolt Holes
    GM832969Courtesy of GENERAL MOTORS CORP.

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

  2. Use spray cleaner GM P/N 12346139, P/N 12377981 (Canadian P/N 10953463), or equivalent into the hole.
  3. Clean the cylinder head bolt holes with compressed air.
  4. Check the cylinder head locating pins for proper installation, location (a) 8.3 mm (0.327 in).
    5. Fig 2: View Of Proper Location For Cylinder Head Gasket Tab
    GM832963Courtesy of GENERAL MOTORS CORP.
  5. When properly installed, with FRONT on the left side, the tab on the cylinder head gasket should be located left of center or closer to the front of the engine.
    6. Fig 3: View Of Cylinder Head Gasket (Left)
    GM832962Courtesy of GENERAL MOTORS CORP.
  6. Install the NEW cylinder head gasket.
    7. Fig 4: View Of Left Cylinder Head
    GM832958Courtesy of GENERAL MOTORS CORP.
  7. Install the cylinder head.
    8. Fig 5: View Of Left Cylinder Head
    GM1424500Courtesy of GENERAL MOTORS CORP.
  8. Install NEW cylinder head bolts.
    9. NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
    Fig 6: Cylinder Head Bolts Tightening Sequence
    GM832971Courtesy of GENERAL MOTORS CORP.
  9. Tighten the cylinder head bolts.

    Tighten: 

    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  .
    3. Tighten the M11 cylinder head bolts (1-10) a final pass to 70 degrees using J 45059  .
    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. Install the pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  11. Install the left exhaust manifold. Refer to Exhaust Manifold Replacement - Left (4.8L, 5.3L, and 6.0L Engine) in Engine Exhaust.
  12. Install the coolant air bleed pipe. Refer to Coolant Air Bleed Pipe Assembly Replacement (4.8L, 5.3L, and 6.0L) in Engine Cooling.
  13. Install the intake manifold. Refer to Intake Manifold Replacement .
  14. Install the generator bracket. Refer to Generator Replacement (4.8L, 5.3L, and 6.0L Engines) in Engine Electrical.
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