F 550 2WD Super Duty V8-6.4L DSL Turbo (2008)
5. Clean the cover mounting surface and apply a dime-sized bead of sealant at the seams.
6. CAUTION: Inspect the volume control valve and the pressure control valve electrical connectors for damage or obstructions at the
connector and mating high-pressure fuel injection pump connector. Verify that the connectors are completely latched to the valve
housings or engine damage may occur.
Install a new high-pressure fuel injection pump cover gasket. Connect the pressure control valve and volume control valve electrical connectors.
7. Install a new press-in-place gasket in the high-pressure fuel injection pump cover.
8. NOTE: Do not remove the Fuel System Caps from the high-pressure fuel injection pump until the fuel tubes are being installed.
Install the high-pressure fuel injection pump cover and bolts.
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Tighten to 13 Nm (115 lb-in).
9. Connect the high-pressure fuel injection pump electrical connector.
10. NOTE: Use a back-up wrench on the high-pressure fuel injection pump fittings.
Install new copper sealing washers, high-pressure fuel injection pump supply tube, fuel injection pump-to-cooler return tube and nuts at the
high-pressure fuel injection pump.
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Tighten to 38 Nm (28 lb-ft).
11. Install the high-pressure fuel injection pump supply tube bracket nuts.
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Tighten to 11 Nm (97 lb-in).
12. Connect the fuel injector return tube fitting to the check valve.
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Tighten to 28 Nm (21 lb-ft).
13. Install the new fuel rail supply tubes in the following sequence.
1
Remove the Fuel System Caps from the fuel rail supply tube openings.
2
NOTE: Support the tubes while hand snugging the nut to make sure of correct assembly of the joints.
Position the fuel rail supply tubes between the high-pressure fuel injection pump and the high-pressure fuel rail. Fully hand start and seat the 4
fuel rail supply tube fittings onto the high-pressure fuel injection pump and high-pressure fuel rails.
3
Snug the 4 fuel rail tube fittings.
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Tighten to 2 Nm (18 lb-in).
4
Pre-tighten the 4 fuel rail supply tube fittings.
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Tighten to 12 Nm (106 lb-in).
5
NOTE: Place a visible mark with a permanent marker on the 4 fuel rail supply tube nuts. Turning the fuel injector supply tube nuts one flat of
the fitting is equal to 60 degrees.
Final-tighten the fuel rail supply tube fittings.
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Tighten the 4 fuel rail supply tube fittings 60 degrees.
14. Install the fuel rail supply tube bracket bolts.
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Tighten to 13 Nm (115 lb-in).