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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1496 (Engine Mechanical - 5.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Cylinder Head Replacement - Left >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
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).

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

  2. Use spray cleaner GM P/N 12346139, or GM 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).
    Fig 1: Identifying Cylinder Head Locating Pins
    G02129159Courtesy 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.
    Fig 2: Identifying Fitting Position Of Cylinder Head Gasket
    G02129160Courtesy of GENERAL MOTORS CORP.
  6. Install the NEW cylinder head gasket.
    Fig 3: Installing Cylinder Head Gasket
    G02129161Courtesy of GENERAL MOTORS CORP.
  7. Install the cylinder head.
    Fig 4: Installing Cylinder Head
    G02129162Courtesy of GENERAL MOTORS CORP.
  8. Install NEW cylinder head bolts (1, 2, 3).
    Fig 5: Installing Cylinder Head Bolts
    G02129163Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  9. Tighten the cylinder head bolts.

    Tighten 

    1. 9.1. Tighten the M11 bolts a first pass in sequence to 30 N.m (22 lb ft).
    2. 9.2. Tighten the M11 bolts a second pass in sequence to 90 degrees using J 36660-A  .
    3. 9.3. Tighten the M11 bolts (1, 2, 3, 4, 5, 6, 7, 8) to 90 degrees and the M11 bolts (9 and 10) to 50 degrees a final pass in sequence using J 36660-A  .
    4. 9.4. Tighten the M8 bolts (11, 12, 13, 14, 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.
      Fig 6: Tightening Cylinder Head Bolts In Sequence
      G02129164Courtesy of GENERAL MOTORS CORP.
  10. If equipped, install the auxiliary A/C bracket bolt (5).

    Tighten 

    Tighten the bolt to 20 N.m (15 lb ft).

  11. Install the pushrods. Refer to VALVE ROCKER ARM AND PUSH ROD REPLACEMENT   .
  12. Install the left exhaust manifold. Refer to EXHAUST MANIFOLD REPLACEMENT - LEFT (5.3L ENGINE)  in Engine Exhaust.
  13. Install the coolant air bleed pipe. Refer to COOLANT AIR BLEED PIPE ASSEMBLY REPLACEMENT (5.3L ENGINE)  in Engine Cooling.
  14. Install the generator bracket.
    Fig 7: Locating Auxiliary A/C Bracket Bolt
    G02129165Courtesy of GENERAL MOTORS CORP.
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