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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Engine Mechanical - 1.4L (LV7) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Valve Stem Oil Seal and Valve Spring Replacement (L5Q) >> Installation Procedure

Installation Procedure

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.
  1. Install NEW valve stem oil seal (2). Use the EN-46116  installer (1).
    Fig 1: Pliers And Intake Valve Stem Oil Seals
    GM2373171Courtesy 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.
    NOTE: Always use NEW valve stem oil seals when assembling the cylinder head.
    NOTE: Force should only be applied to the valve spring contact area of the new valve stem oil seal during installation.
  2. Push and twist the valve stem oil seal into position on the valve guide until the seal positively locks on the guide using the EN-46116  installer.
  3. Lubricate the valve stem and valve guide ID with clean engine oil. Refer to Adhesives, Fluids, Lubricants and Sealers (Europe L5Q)Adhesives, Fluids, Lubricants and Sealers (North America L5Q) .
  4. Install the exhaust valve spring (1) or the intake valve spring (3) and the upper valve spring retainer (2). Which valve spring is to be installed, depends on the installation progress.
    Fig 2: Valve Spring Retainer And Exhaust/Intake Valve Spring
    GM4037102Courtesy of GENERAL MOTORS COMPANY
    NOTE: Make sure that the valve springs and the valve spring retainers will be installed in their original position.
  5. Using the EN-50717-2  compressor, push down the valve spring retainer (1) and compress the valve spring (3) until the valve keys (2) can be inserted. Carefully insert the valve keys then, so that they are proper installed to the valve stem grooves.
    Fig 3: Valve Spring Retainer And Valve Spring
    GM2678153Courtesy 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.
  6. Carefully release the tension from the EN-50717-2  compressor.
  7. Inspect the valve keys and valve spring retainer for proper seat.
  8. Repeat the procedure with the remaining valves and cylinders.
    Fig 4: Valve Stem Oil Seal and Valve Spring Tools
    GM3701707Courtesy of GENERAL MOTORS COMPANY
  9. Remove EN-50717-1  stands and the EN-50717-2  compressor from the cylinder head.
  10. Install the hydraulic valve lash adjuster arm. Refer to Hydraulic Valve Lash Adjuster Arm Replacement (L5Q) .
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