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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (Engine Mechanical - 1.4L (LV7) - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Cylinder Head Disassemble (North America) >> Intake and Exhaust Valve Components Removal

Intake and Exhaust Valve Components Removal

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Spark Plugs
    GM4179379Courtesy of GENERAL MOTORS COMPANY
  1. Remove the spark plugs (1).
    2. Fig 2: Special Tool To Remove/Install Valve Stem Keys
    GM4171317Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.

    CAUTION:

    Do not compress the valve springs less than 25.0 mm (0.984 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage.

    NOTE:
    • Many internal engine components will develop specific wear patterns on their friction surfaces.
    • Components MUST be separated, marked, or organized in a way to ensure installation to their original location and position. Take precautions in order to prevent interchanging of parts.
    • Tag or mark each part immediately when removed. Indicate location, direction, or orientation when necessary.
  2. Using EN-8062  compressor and EN-43963  adapter, compress the upper valve spring retainer down until the valve stem keys are discharged from spring load. Use a suitable tool and a bit of grease to remove the valve stem keys (1).
    3. Fig 3: Valve Spring, Retainer And Oil Seal
    GM4179380Courtesy of GENERAL MOTORS COMPANY
  3. Slowly release the EN-8062  compressor from the valve spring assembly. Remove the valve spring retainer (1) and the valve spring (2).
  4. Repeat the procedure for all valve stem keys, valve spring retainers, and valve springs.
    5. CAUTION:

    Do not damage the valve guide. Remove any burrs that have formed at the key groove by chamfering the valve stem with an oil stone or a file.

  5. Using EN-46116  remover, remove the valve stem oil seals (3). Discard all used seals and replace with new.
    6. Fig 4: Exhaust/Intake Valves
    GM4179381Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Components MUST be separated, marked, or organized in a way to ensure installation to their original location and position. Take precautions in order to prevent interchanging of parts.

  6. Remove the 8 exhaust valves (1) and the 8 intake valves (2) from the cylinder head.
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