Isuzu 4ja1, Workshop Manual

Page: 553 / 564

EXHAUST SYSTEM 6F – 17
INSPECTION AND REPAIR
Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is discovered during
inspection.
Turbocharger pressure check
1. Remove the hose between the waste gate and the
compressor outlet pipe.
2. Connect the pressure gauge. To compressor outlet
pipe.
3. Start the engine and gradually increase the engine
speed (the vehicle must be stationary with no load
applied to the engine).
4. Check to see that turbocharger pressure rises to
approximately 141.3 kPa (1060 mmHg).
Pressure Gauge : 5-8840-0075-0
150RY00030
Waste gate operation check
1. Remove the hose between the waste gate and the
compressor outlet pipe.
2. Connect the pressure gauge. To waste gate actuator.
3. Check to see that the rod begins to move when a
pressure of approximately 118 kPa (885 mmHg) is
applied to the waste gate.
Note:
Do not apply a pressure greater than 150kPa (1125
mmHg) to the waste gate during this check.
150RY00031
Unit Inspection (Remove Turbo. from engine)
Check to see the pressure required to move the control
rod 2 mm is within the limits shown below.
kPa/mmHg
4JH1TC 134.8/1011
4JA1TC 147.7/1108
RTW86FSH000101
Contact the “ISUZU MOTORS LIMITED” Dealer service
department or “IHI SERVICE FACILITY” for major repairs
and maintenance.
Important wheel shaft end play and bearing clearance
standards and limits are included below for your reference.