Service Manual

ISB, ISBe and QSB (Common Rail [...] Fuel Filter (Spin-On Type)
Section 6 - Injectors and Fuel Lines - Group 06 Page 6-39
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NOTE: 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 the engine and check for leaks.
Marine Applications
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.
CAUTION
Failure to open the fuel return valve will result in
damage to the fuel cooler. Be sure that both the fuel
supply and return valves are open. Be sure that there
is an unrestricted flow of fuel back to the fuel tank
prior to cycling the keyswitch to prime the fuel
system.
CAUTION
To avoid damage to the fuel system, do not vent air
from the high-pressure fuel system before starting the
engine. It is not necessary to pre-fill the on-engine
fuel filter before installation. Cycling the keyswitch
several times and cranking the engine will fill the fuel
filter and prime the fuel system.
Open the fuel supply and return valves to the engine.
Refer to the OEM service manual.
Connect the wiring harness from the water-in-fuel sensor,
if equipped.
Priming the fuel system requires cycling the keyswitch
several (5 or more) times to make sure the fuel filter is
primed properly and that all the air is out of the fuel
system down stream through the fuel cooler.
Operate the engine and check for leaks.