Check The High-Pressure Fuel Pump Case And Fuel Pump Lifter

Check that the high-pressure fuel pump case and the fuel pump lifter have no deformation, cracks or other damages.
Check the clearance between the fuel pump lifter and high-pressure fuel pump case bore. Check the clearance between fuel pump lifter and high-pressure fuel pump case bore by measuring the outer diameter of fuel pump lifter and the inner diameter of high-pressure fuel pump case bore respectively.
1. Measure the outer diameter of fuel pump lifter with a micrometer.
  NOTE:
  - Measurement should be performed at a temperature of 20°C (68°F).
  - Measure at several points, and take notes of the value of most worn location.
  Fig 1: Checking Fuel Pump Lifter Outer Diameter Using Micrometer
  Courtesy of SUBARU OF AMERICA, INC.
2. Using a caliper gauge, measure the inner diameter of high-pressure fuel pump case bore.
  NOTE:
  - Measurement should be performed at a temperature of 20°C (68°F).
  - Measure at several points, and take notes of the value of most worn location.
  Fig 2: Checking High Pressure Fuel Pump Case Bore Inner Diameter Using Caliper Gauge
  Courtesy of SUBARU OF AMERICA, INC.
3. Calculate the clearance between the fuel pump lifter and high-pressure fuel pump case bore. If it is not within the standard, replace the fuel pump lifter and high-pressure fuel pump case as a set.
  Clearance between fuel pump lifter and high-pressure fuel pump case bore:
  
  Standard
  
  0.055 - 0.108 mm (0.0022 - 0.0043 in)