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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> Charge Air Cooler Diagnosis (Full System Leak Test) >> Air Pressure Application

Air Pressure Application

WARNING: This page is about a different variant/trim than selected.
WARNING:

Refer to Charge Air Cooler Warning .

  1. Attach the EN 46091-1  outlet hose to the quick disconnect fitting on EN 47656-NA  .
  2. Connect the air supply to the air valve on the gauge/regulator assembly.
  3. Open the air supply valve slowly, increasing the air pressure to a maximum of 69 kPa (10 psi) while listening for abnormal air leaks.
    4. NOTE:
    • For accurate readings you must allow at least 30 s for the air pressure to stabilize.
    • The engine will not hold pressure if the gauge valve is turned OFF.
    • If an excessive air leak hissing sound at turbocharger outlet is present, rotate the crankshaft 90 degrees.
  4. Leave the air valve turned ON for the duration of the test.
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