High-Pressure Fuel Pump: Removal
NOTE:
Do not loosen any fittings or plugs on the high-pressure fuel pump.
- With the vehicle in NEUTRAL, position it on a hoist. Refer to: Jacking and Lifting - Overview .
- Release the fuel system pressure. Refer to: Fuel System Pressure Release .
- Remove the intake manifold. Refer to: Intake Manifold .
- Remove the high-pressure fuel pump bracket bolt, then remove the bracket.
- Disconnect the high-pressure fuel pump electrical connector.
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NOTE: When removing or installing the fuel injection pump noise insulator, spreading the openings will reduce the risk of damage.
Remove the fuel injection pump noise insulator.
- Detach the wiring harness retainers from high-pressure fuel line shield.
- Remove the high-pressure fuel line shield retainers, then remove high-pressure fuel line shield.
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NOTE: To release the fuel pressure in the high-pressure fuel tube, wrap the high-pressure fuel tube flare nuts with a shop towel to absorb any residual fuel pressure during the loosening of the high-pressure fuel tube flare nuts.
Remove the high-pressure fuel tube retainers. Disconnect the high-pressure fuel tube flare nuts, then remove and discard the high-pressure fuel tube.
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NOTE: Make note of the high-pressure fuel pump supply Oetiker® clamp end location for correct installation.
Disconnect the high-pressure fuel pump fuel feed quick release coupling. Follow the directions for the quick release coupling type 2. Refer to: Quick Release Coupling .
- Alternately loosen the high-pressure fuel pump nuts one complete revolution at a time and remove, then remove the high-pressure fuel pump.
- Remove and discard the high-pressure fuel pump O-ring seal.
- Remove the high-pressure fuel pump roller tappet.
- Inspect the high-pressure fuel pump roller tappet. If any flat spots or scoring are found, especially in the indicated areas, then inspect the high-pressure fuel pump and the high-pressure fuel pump roller tappet drive lobe. Install new components as needed.
- If needed, remove the high-pressure fuel pump mounting studs.