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Home >> Hyundai >> 2018 >> Kona Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 214 (Cylinder Head Assembly - 1.6L) >> Cylinder Head >> Repair Procedures >> Inspection >> Valve And Valve Spring

Valve And Valve Spring

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  1. Inspect the valve stems and valve guides.
    1. Using a caliper gauge, measure the inner diameter of valve guide.

      Valve Guide Inner Diameter: 

      5.500 - 5.512 mm (0.2165 - 0.2170 in)

      G12593190Courtesy of HYUNDAI MOTOR AMERICA
    2. Using a micrometer, measure the outer diameter of valve stem.

      Valve Stem Outer Diameter: 

      Intake: 5.465 - 5.480 mm (0.2152 - 0.2157 in)

      Exhaust: 5.458 - 5.470 mm (0.2149 - 0.2154 in)

      G12593191Courtesy of HYUNDAI MOTOR AMERICA
    3. Subtract the valve stem outer diameter measurement from the valve guide inner diameter measurement.

      Valve Stem- To-Guide Clearance: 

      Intake: 0.020 - 0.047 mm (0.0008 - 0.0019 in)

      Exhaust: 0.030 - 0.054 mm (0.0012 - 0.0021 in)

      If the clearance is greater than specification, replace the valve or the cylinder head.

  2. Inspect the valves.
    1. Check the valve is ground to the correct valve face angle.
    2. Check that the surface of valve for wear. If the valve face is worn, replace the valve.
    3. Check the valve head margin thickness.

      If the margin thickness is less than minimum, replace the valve.

      Margin: 

      Standard

      Intake: 1.35 - 1.65 mm (0.0531 - 0.065 in)

      Exhaust: 1.55 - 1.85 mm (0.0610 - 0.0650 in)

      G12593192Courtesy of HYUNDAI MOTOR AMERICA
    4. Check the length of valve.

      Valve Length: 

      Standard

      Intake: 93.15 mm (3.6673 in)

      Exhaust: 92.60 mm (3.6457 in)

    5. Check the surface of valve stem tip for wear. If the valve stem tip is worn, replace the valve.
  3. Inspect the valve seats.
    1. Check the valve seat for evidence of overheating and improper contact with the valve face. If the valve seat is worn, replace the cylinder head.
    2. Check the valve guide for wear. If the valve guide is worn, replace the cylinder head.
  4. Inspect the valve springs.
    1. Using a steel square, measure the out-of-square of valve spring.
    2. Using a vernier calipers, measure the free length of valve spring.

      Valve Spring: 

      Standard

      Free height: 45.1 mm (1.7756 in)

      Out of square: Less than 1.5°

      G12593193Courtesy of HYUNDAI MOTOR AMERICA
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