Service Manual

ISB, ISBe and QSB (Common Rail [...] Fuel Return Overflow Valve
Section 6 - Injectors and Fuel Lines - Group 06 Page 6-81
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Finishing Steps
• Install the exhaust rocker and adjust the exhaust valve
lash. Refer to Procedure 003-008 in Section 3.
• Install the rocker lever cover. Refer to Procedure
003-011 in Section 3.
• Install the high-pressure fuel line from the fuel rail to
the high-pressure connector. Refer to Procedure
006-051 in Section 6.
• For Marine applications, open fuel supply and return
valves.
• Operate the engine and check for leaks.
Fuel Return Overflow Valve (006-044)
Initial Check
Check the fuel return overflow valve for external leaks or
other damage.
To test fuel pump return flow, Refer to Procedure 005-016
Remove
WARNING
When using a steam cleaner, wear safety glasses or a
face shield, as well as protective clothing. Hot steam
can cause serious personal injury.
Steam-clean the fuel pump.
Remove the fuel return overflow valve.