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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 Assemble (North America) >> Intake and Exhaust Valve Components Installation

Intake and Exhaust Valve Components Installation

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: 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.

  1. Ensure that the valve train components will be installed in their original position.
  2. Lubricate the valve guides and the valve stems with engine oil.
  3. Install the exhaust valves (1) and the intake valves (2) in the cylinder head.
    4. Fig 2: Valve Spring, Retainer And Oil Seal
    GM4179380Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Valve stem oil seal sets will contain 2 different colored seals, black and green. The set of 8 seals that are green go on the exhaust valves.
    • Ensure the valve stem oil seals do not deform during installation.
    • Force should only be applied to the valve spring contact area of the new valve stem oil seal during installation.
  4. Using EN-46116  installer, carefully push the NEW valve stem oil seals (3) into position, until the seal positively locks on the guide.
  5. Lubricate the valve stem and valve guide ID with clean engine oil. Refer to Adhesives, Fluids, Lubricants, and Sealers (North America LV7)Adhesives, Fluids, Lubricants, and Sealers (North America L5Q) .
  6. Install the valve spring (2) and the valve spring retainer (1).
    7. Fig 3: Special Tool To Remove/Install Valve Stem Keys
    GM4171317Courtesy of GENERAL MOTORS COMPANY
  7. Using EN-8062  compressor, position EN-43963  adapter properly to the valve spring retainer.
    8. 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.

  8. Using EN-8062  compressor, compress the valve spring and scale the upper valve spring retainer down until the valve stem keys can be installed. Use a suitable tool and a bit of grease to install the valve stem keys (1).
  9. Slowly release the tension on the valve spring.
  10. Inspect for proper valve key seating.
  11. Repeat the procedure for the remaining valves.
    12. Fig 4: Spark Plugs
    GM4179379Courtesy of GENERAL MOTORS COMPANY
  12. Install the spark plugs (1). Tighten to 17 N.m (13 lb ft).
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