Service Manual

ISB, ISBe and QSB (Common Rail [...] Injector Supply Lines (High Pressure)
Section 6 - Injectors and Fuel Lines - Group 06 Page 6-85
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Install
Loosen the capscrews for the fuel rail. Do not remove the
fuel rail. The capscrews are loosened to allow proper
alignment of the fuel rail after installing the new fuel line.
Install and hand-tighten all of the fuel lines.
Tighten the Injector High Pressure Supply Lines:
3.9L and 5.9L without electric lift pump.
Torque Value: 22 N•m [ 195 in-lb ]
5.9L with electric lift pump.
Torque Value: 30 N•m [ 22 ft-lb ]
4.5L and 6.7L engines.
Torque Value: 35 N•m [ 26 ft-lb ]
Tighten the injector supply line brace cap screws.
Torque Value: 24 N•m [ 212 in-lb ]
Tighten the capscrews for the fuel rail.
Torque Value: 24 N•m [ 212 in-lb ]
Finishing Steps
WARNING
The fuel pump high-pressure fuel lines and fuel rail
contain very high-pressure fuel. Never loosen any
fittings while the engine is running. Personal injury
and property damage can result.
For marine applications, open the fuel supply and return
valves.
It is not necessary to vent air from the high-pressure fuel
system before starting the engine. Cranking the engine
will prime the fuel system.
Operate engine and check for leaks.