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Home >> Subaru >> 2006 >> Legacy GT spec.B >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Timing Belt >> Engine Mechanical (H4DOTC) >> Cylinder Head >> Inspection >> Intake And Exhaust Valve

Intake And Exhaust Valve

  1. Inspect the flange and stem of the valve, and replace if damaged, worn or deformed, or if H exceeds the standard or there is uneven wear.

    H: 

    Standard (Intake) 1.0 - 1.4 mm (0.039 - 0.055 in) 

    Standard (Exhaust) 1.3 - 1.7 mm (0.051 - 0.067 in) 

    Valve overall length: 

    Intake 104.4 mm (4.110 in) 

    Exhaust 104.65 mm (4.1201 in) 

    Fig 1: Identifying Valve Overall Length
    G05018168
  2. Put a small amount of grinding compound on the seat surface, and lap the valve and seat surface. Install a new intake valve oil seal after lapping.