Check that the high-pressure fuel pump case has 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.

Measure the outer diameter of fuel pump lifter with a micrometer.

NOTE:

Measurement should be performed at a temperature of 20°C (68°F).
Record the measured value.

Courtesy of SUBARU OF AMERICA, INC.

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).
Record the measured value.

Courtesy of SUBARU OF AMERICA, INC.

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

0.065 - 0.134 mm (0.0026 - 0.0053 in)

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Check High-Pressure Fuel Pump Case

Use the Manual With the Right Hardware

When to See a Mechanic