Posted on by

ISM, ISMe, and QSM11 – 010-031   Air Intake Restriction

Table of Contents

Measure

Measure

 TOC

Install a vacuum gauge or water manometer in the intake 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.

SMALL | MEDIUM | LARGE


Operate the engine at full throttle and rated rpm with maximum load.

Record the data on the gauge or manometer.

Inlet Air Restriction

mm-h2o in-h2o
63.5 MAX 25.0

SMALL | MEDIUM | LARGE
   


If restriction exceeds specifications:

  • Replace or clean the air filter element. Refer to the OEM service manual.

SMALL | MEDIUM | LARGE
   


  • Inspect the intake piping for damage. Refer to the OEM service manual.

SMALL | MEDIUM | LARGE
   


Remove the test equipment.

If damage resulted in coolant, oil, excessive fuel or excessive black smoke entering the exhaust system, the aftertreatment system must be inspected. Refer to Procedure 014-013 in Section 14.

SMALL | MEDIUM | LARGE
Last Modified:  23-Jan-2009
Avatar photo

Published by Jack

Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.