TURBOCHARGER
TNV DI Service Manual
10-15
Periodic Inspection
1. Connect a hand-operated air pump to the waste
gate actuator pipe (Figure 10-6, (1)). The pump
should be equipped with a 30 psi (0.21 MPa;
2.21 kgf/cm
2
) pressure gauge
(Figure 10-6, (2)), and a pressure release valve
to release any pressure pumped into the
system. (Similar pumps are used to check for
leaks in marine gear cases.)
Figure 10-6
2. Apply 17 psi (0.12 MPa; 1.2 kgf/cm
2
) to the
waste gate actuator (Figure 10-6, (3)) circuit.
Observe if the waste gate valve is open fully. If
the waste valve does not open fully, replace the
turbocharger or have it repaired by a qualified
repair facility.
Waste Gate Actuator Leak Test
Allow the pressure, 17 psi (0.12 MPa; 1.2 kgf/cm
2
)
to remain in the circuit for one minute. After one
minute, observe the pressure reading.
• If the pressure reading is equal to or greater
than 15.9 psi (0.11 MPa; 1.1 kgf/cm
2
), the
waste gate actuator is not leaking and is
operating properly.
• If the pressure reading is less than 15.9 psi
(0.11 MPa; 1.1 kgf/cm
2
), the waste gate
actuator is leaking. Replace the turbocharger
or have it repaired by a qualified repair facility.
Installation of Turbocharger
1. Pour 2 oz (60 cc) of clean engine oil in the oil
inlet port at the top of the turbocharger. Rotate
the compressor wheel to ensure the shaft
bearings are lubricated.
2. Flush the oil lines to ensure that they are free of
containments.
3. Put a new turbocharger exhaust manifold
gasket in place and reinstall turbocharger on
the exhaust manifold.
4. Apply anti-seize compound to the turbocharger
mounting studs.
5. Reinstall the mounting nuts. Torque the nuts to
the specified torque.
6. Install new sealing washers and O-rings and
reinstall the inlet and outlet oil lines to the
turbocharger.
7. Reinstall the air inlet connection to the
turbocharger turbine housing.
8. Reinstall the exhaust connection to the
turbocharger compressor housing.
A
WARNING
Never apply over 40 psi (2.8 kgf/cm) to
the waste gate actuator.
0000026en
00001617
(1
(2)
(3)
CAUTION
Do not allow any material to fall into the
oil lines or the oil inlet and outlet ports
of the turbocharger.
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