8. Fuel System
122
Injectors, High-Pressure Fuel Connectors
Components and Functions
The injectors serve to inject fuel into the combustion chamber
by controlling the solenoid valves based on signals from the
ECU. The high-pressure fuel connectors consist of the
connector body, edge filter, and O-ring for preventing leaks in
the return fuel. The connectors are used to deliver fuel from the
high-pressure fuel pipes to the injectors through connections
between the high-pressure fuel pipes and injectors.
Installation
1. Clean all parts thoroughly, taking care not to contaminate
them with foreign matter.
EDX22190219
1) Fuel lines connecting the common rail to the injectors require
particular cleanliness as they lack a filtration function.
2) Clean and remove all foreign matter from the holes drilled
in the cylinder head for inserting high-pressure fuel
connectors and holes for injectors.
3) When the injector is disassembled, the high-pressure fuel
connector must be replaced with a new one.
4) In the event that fuel accumulated in the fuel return line
enters the combustion chamber while disassembling the
injector, it must either be sucked out using a hand pump
or discharged by cranking the starter motor with the fuel
shut off.
When installing a new high-pressure fuel pipe after
disconnecting the high-pressure fuel pipe connected to
a high-pressure fuel connector (HPC), make sure to
retighten the HPC mounting nuts to the specified torque.
In addition, do not reuse high-pressure fuel pipes as the
seal for high-pressure fuel is deformed while tightening
them.
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