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5.2 INJECTION NOZZLE
WARNING
Check the injection nozzle only after confirming that nobody is near the spray. If the spray from the
nozzle contacts the human body, cells may be destroyed and blood poisoning may result.
(a) GOOD (b) BAD
5.2.1 Nozzle Injection Pressure
1. Set the injection nozzle in a nozzle tester.
2. Slowly move the tester handle to measure the pres-
sure at which fuel begins jetting out from the nozzle.
3. If the measurement is not within factory specifica-
tions, replace the nozzle assembly.
Fuel Injection
Pressure
1st Stage
Factory
Specification
18.64 to 20. 1 MPa
190 to 205 kgt/cm
2
2703 to 2915 psi
5.2.2 Nozzle Spraying Condition
1. Set the injection nozzle in a nozzle tester and check
the nozzle spraying condition.
2. If the spraying condition is defective, replace the
injection nozzle assembly.
5.2.3 V alve Seat Tightness
1. Set the injection nozzle in a nozzle tester.
2. Raise the fuel pressure, and maintain 16.67 MPa
(170 kgf/cm
2
, 2418 psi) for 10 seconds.
3. If any fuel leak is found, replace the injection nozzle
assembly.
Valve S eat Tight-
ness
Factory
Specification
No fuel leak at
16.67MPa
170 kgf/cm
2
2418 psi