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 .
- Disconnect the battery. Refer to: Battery Disconnect and Connect .
- Remove the charge air cooler (CAC) intake pipe - RH. Refer to: Charge Air Cooler (CAC) Intake Pipe .
- Disconnect the high-pressure fuel pump electrical connector.
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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 high-pressure fuel tube flare nuts.
Disconnect the high-pressure fuel pump to fuel rail high-pressure fuel tube flare nuts, then remove and discard the high-pressure fuel pump to fuel rail high-pressure fuel tube.
- Disconnect the high-pressure fuel pump fuel feed tube quick release coupling. Refer to: QUICK RELEASE COUPLING
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NOTE: Alternately loosen the high-pressure fuel pump nuts one complete revolution at a time.
Remove the high-pressure fuel pump nuts, then remove the high-pressure fuel pump.
- Remove and discard the high-pressure fuel pump O-ring seal.
- Remove the high-pressure fuel pump 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.