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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> Charge Air Cooler Diagnosis (Induction System Smoke Test) >> Smoke Test Application

Smoke Test Application

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the engine cover, refer to Engine Cover Replacement .
  2. Place the air filter in a disposable plastic bag and secure it in the air cleaner housing to help prevent smoke leakage.
  3. Remove a B193 Charge Air Cooler Temperature Sensor, refer to Charge Air Temperature Sensor Replacement (Charge Air Cooler Inlet Air Tube) , or Charge Air Temperature Sensor Replacement (Charge Air Cooler Outlet Air Hose) .
  4. Connect the GE 41413-A  hose to the GE 41413-311  .
    5. NOTE:

    Wrap the GE 41413-311  with a layer of electrical tape to protect the threads in the inlet/outlet duct.

  5. Insert the GE 41413-311  into the Charge Air Cooler (CAC) temperature sensor mounting boss on the CAC inlet or outlet duct.
  6. Apply smoke continuously with the GE 41413-A  while moving all duct work, pipes, and tubes.
    7. NOTE:
    • To improve the visibility of the smoke exiting the engine, illuminate the suspected leak area with the GE-41413-SPT  and observe the area from different angles.
    • Commanding the intake air flow valve closed with a scan tool can help to increase the volume of smoke within the CAC and induction tubes.
  7. Verify smoke is not visible at the components listed below:
    • Mass air flow sensor
    • Air cleaner outlet duct
    • Turbocharger air inlet adapter
    • Crankcase depression regulator valve
    • Positive crankcase Ventilation Hoses/Pipes/Tubes
    • Intake manifold and gaskets
    • Charge air cooler inlet and outlet hoses.
    • Charge air cooler.
    • If smoke is visible 

      Repair or replace the affected gasket, seal or component as necessary and repeat steps 5 and 6.

    • Go to next step: If smoke is not visible 
  8. Refer to Charge Air Cooler Diagnosis (Full System Leak Test) , or Charge Air Cooler Diagnosis (Induction System Smoke Test)  and perform the Charge Air Cooler Diagnosis (Induction System Air Leak Test).
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