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SEBU8732
High Pressure Fuel Lines
Contact with high pressure fuel may cause fluid
penetration and burn hazards. High pressure fuel
spray may cause a fire hazard. Failure to follow
these inspection, maintenance and service in-
structions may cause personal injury or death.
Illustration 12
(1) High pressure line
(2) High pressure line
(3) High pressure line
The high pressure fuel lines are the fuel lines that are
between the high pressure fuel pump and the high
pressure fuel manifold and the fuel lines that are
between the fuel manifold and cylinder head. These
fuel lines are different from fuel lines on other fuel
systems.
This is because of the following items:
• The high pressure fuel lines are constantly
charged with high pressure.
• The internal pressures of the high pressure fuel
lines are higher than other types of fuel system.
• The high pressure fuel lines are formed to shape
and then strengthened by a special process.
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(4) High pressure line
(5) High pressure line
(6) High pressure line
Do not step on the high pressure fuel lines. Do not
deflect the high pressure fuel lines. Do not bend or
strike the high pressure fuel lines. Deformation or
damage of the high pressure fuel lines may cause a
point of weakness and potential failure.
Do not check the high pressure fuel lines with the
engine or the starting motor in operation. After the
engine has stopped, you must wait for 10 minutes in
order to allow the fuel pressure to be purged from the
high pressure fuel lines before any service or repair is
performed on the engine fuel lines.
Do not loosen the high pressure fuel lines in order to
remove air from the fuel system. This procedure is not
required.
Visually inspect the high pressure fuel lines before
the engine is started. This inspection should be each
day.
Safety Section
High Pressure Fuel Lines
(7) High pressure fuel manifold (rail)
(8) High pressure line
(9) Fuel transfer line that is high pressure
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