Service Manual

ISB, ISBe and QSB (Common Rail [...] Air Intake Restriction
Section 10 - Air Intake System - Group 10 Page 10-41
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Test
WARNING
Avoid touching the cold starting aid with your hands
while the cold starting aid is operating.
Connect INSITE™ electronic service tool.
From the list of ECM diagnostic tests, select “Intake Air
Heater Override”.
Follow the on-screen instructions to determine if the cold
starting aid and cold starting aid circuitry are functioning
properly.
To check if the cold starting aid is heating, use an infrared
non-contact thermometer, Part Number 3164487.
Air Intake Restriction (010-031)
Measure
Manometer, Part Number ST-1111-3
Install a vacuum gauge or water manometer, Part Number
ST-1111-3, in the inlet air piping.
The gauge adapter must be installed at a 90-degree
angle to the airflow in a straight section of pipe, one pipe
diameter before the turbocharger.
NOTE: On many automotive, industrial and marine
applications, the air intake restriction can be measured by
removing the pop-up flag restriction gauge and installing a
vacuum gauge of water manometer.
Operate the engine at full throttle and rated rpm with
maximum load.
Record the data on the gauge or manometer.
Air Intake Restriction
mm H
2
O in H
2
O
635 MAX 25
If restriction exceeds specifications:
• Replace or clean the air filter element. Refer to the
equipment manufacturer's instructions.