Isuzu AA-6HK1T, Workshop Manual

Page: 239 / 242

6J–6 ENGINE INDUCTION
Inspection and Repair
Turbocharger damage or maladjustment results in a
reduced volume of air to the engine. Engine
performance suffers.
If there is a marked drop in engine performance, first
check the engine. If the engine appears normal, check
the turbocharger.
If excessive wear or damage is discovered during
turbocharger inspection, the appropriate parts must be
adjusted, repaired, or replaced. Contact your nearest IHI
Service Center to make arrangements for servicing.
Rotor Shaft Axial Play
1. Install a dial indicator to the turbine housing as
shown in the illustration.
2. Move the shaft back-and-forth to measure the rotor
shaft axial play. Note the total indicator reading
(TIR).
Rotor shaft axial play:
Standard: 0.06 – 0.09 mm (0.0024 – 0.0035 in)
Limit: 0.11 mm (0.00433 in)
If the measured value exceeds the specified limit, the
rotor shaft must be replaced.
Rotor Shaft Radial Play
1. Invert the turbocharger so that the turbine exhaust
inlet flange is facing up.
2. Install a dial indicator to the turbine housing as
shown in the illustration.
3. Measure the rotor shaft axial play. Note the total
indicator reading (TIR).
Rotor shaft radial play
Standard: 0.10 – 0.17 mm (0.0039 – 0.0067 in)
Limit: 0.205 mm (0.00807 in)
If the measured value exceeds the specified limit, the
rotor shaft must be replaced.
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