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Valve Clearance: Adjustment

WARNING: This page is about a different variant/trim than selected.
  1. Measure all the valve clearances. Refer to , INSPECTION , Valve Clearance.
    NOTE: Record the measured value of each valve clearance.
    Fig 1: Measuring Thickness Of Valve Lifter Using Micrometer
    G04998618Courtesy of SUBARU OF AMERICA, INC.
  2. Remove the camshaft. Refer to , REMOVAL , Camshaft.
  3. Remove the valve lifter.
  4. Measure the thickness of valve lifter using micrometer.
    Fig 2: Identifying Front Hood Damper Mounting Position
    G04998619Courtesy of SUBARU OF AMERICA, INC.
  5. Select a valve lifter of suitable thickness using the measured valve clearance and valve lifter thickness, and install it.
    NOTE: Use a new valve lifter.
    Unit: mm (in)
    Intake valve: S = (V + T) - 0.19 (0.0075)
    Exhaust valve: S = (V + T) - 0.35 (0.0138)
    S: Valve lifter thickness required
    V: Measured valve clearance
    T: Valve lifter thickness to be used
  6. Install the camshaft. Refer to , INSTALLATION , Camshaft.
  7. Install the cam sprocket. Refer to , INSTALLATION , Cam Sprocket.
  8. Install the timing belt. Refer to , TIMING BELT , INSTALLATION, Timing Belt.
  9. Measure all valves for valve clearance again at this time. If the valve clearance is not within the adjustment value, repeat the procedure over again from the first step.

    Valve clearance (adjustment value): 

    Intake 

    0.20 +0.01 -0.03  mm (0.0079 +0.0004 -0.0012  in) 

    Exhaust 

    0.35±0.02 mm (0.0138±0.0008 in) 

  10. After adjustment, install the related parts in the reverse order of removal.
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