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Home >> Chevrolet >> 2018 >> Impala Premier, Gas >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 2.5L (LCV)) >> Repair Instructions - On Vehicle >> Cylinder Head Replacement >> Installation Procedure

Installation Procedure

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    NOTE:

    If replacing a cylinder head, oil gallery plugs may need to be transferred to the new cylinder head.

  1. For cylinder head assemble. Cylinder Head Assemble 
  2. GM2726774Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not use any sealing material.

    Install the cylinder head gasket (3) to the block.

  3. Install the cylinder head (2). Ensure the number 1 cylinder is at top dead center (TDC). The key on the crankshaft should be on top in the 12 o'clock position.
  4. Fig 1: Identifying Cylinder Head Bolts With Tightening Sequence
    GM2726776Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    NOTE:

    Always use NEW cylinder head bolts.

    Install the cylinder head bolts.

    1. Tighten the bolts in sequence to 30 N.m (22 lb ft).
    2. Tighten the bolts an additional 190 degrees in sequence using the EN 45059  meter.
  5. Install the exhaust valve rocker arm. Exhaust Valve Rocker Arm Replacement 
  6. Install the fuel pump. Refer to Fuel Pump Replacement .
  7. Install the intake valve rocker arm. Exhaust Valve Rocker Arm Replacement 
  8. Install the exhaust manifold. Exhaust Manifold Replacement
  9. Install the intake manifold. Intake Manifold Replacement 
  10. Refill the engine with NEW oil. Engine Oil and Oil Filter Replacement 
  11. Refill the coolant system. Cooling System Draining and Filling (Vacuum and Fill)Cooling System Draining and Filling (Static)