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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 (LV7) >> 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 have to be installed to the exhaust valves.
  2. 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 Springs And Retainers
    GM3216197Courtesy of GENERAL MOTORS COMPANY
    NOTE: Make sure that the valve springs and the valve spring retainers will be installed in their original position.
  3. 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
    CAUTION: The valve stem keys must correctly seat in the valve spring cap. Engine damage may occur by not installing properly.
  4. Carefully release the tension from the EN-50717-2  compressor.
  5. Inspect the valve keys and valve spring retainer for proper seat.
  6. Repeat the procedure with the remaining valves and cylinders.
    Fig 4: Valve Stem Oil Seal and Valve Spring Tools
    GM3701707Courtesy of GENERAL MOTORS COMPANY
  7. Transfer the EN-50717-1  stands, EN-51511  plug and the EN-50717-2  compressor as needed.
  8. Take care that air pressure is always applied to the combustion chamber of the treated cylinder.
  9. Remove the EN-51511  plug from the injector bores.
  10. Remove EN-50717-1  stands and the EN-50717-2  compressor from the cylinder head.
  11. Install the hydraulic valve lash adjuster arm. Refer to Hydraulic Valve Lash Adjuster Arm Replacement (LV7) .
  12. Install the camshaft position actuator. Refer to Camshaft Position Actuator Replacement .
  13. Install the spark plug. Refer to Spark Plug Replacement (LV7) .
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