2. Inspection and adjustment
89
[Informative: Fuel injection valve structure]
2) Spray pattern inspection
After adjustment to the specified valve opening
pressure, use a nozzle tester and check the
spray pattern and seat oil-tightness.
a) Seat oil tightness check
• After injecting a few times, increase the
pressure gradually. Hold the pressure for
about 5 seconds at a little before the valve
opening pressure of 1.96 MPa (20 kgf/cm
2
),
and check to see that oil does not drip from
the tip end of the nozzle.
• If extreme oil leak from the overflow joint
exists during injection by the nozzle tester,
check after retightening. If much oil is
leaking, replace the nozzle assembly.
010628-00E
010353-00
2-valve head (3JH4E and 4JH4E)
4-valve head (4JH4-TE and 4JH4-HTE)
010630-00E
Normal
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