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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P205B - P2BAA) And Symptoms) >> Diagnostic Information And Procedures >> Charge Air Cooler Diagnosis (Smoke Test) >> Smoke Test Application

Smoke Test Application

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the E45 Positive Crankcase Ventilation Heater from the air cleaner outlet duct, refer to Air Cleaner Outlet Duct Replacement .
  2. Remove the air cleaner element, refer to Air Cleaner Element Replacement . Place a disposable plastic bag over the air outlet in the air cleaner housing.
  3. Connect the GE-41413-A  to the GE-41413-311  .
  4. Wrap a shop towel around the GE-41413-311  to create a seal, and place the GE-41413-311  into the opening for the PCV heater in the air cleaner outlet duct.
  5. Apply smoke continuously while moving all duct work, pipes, and tubes.
    6. 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.
  6. Verify smoke is not visible exiting the engine, including the components listed below:
    • All air induction system hose clamps.
    • Air cleaner outlet duct.
    • Charge air cooler inlet and outlet hoses.
    • Charge air cooler.
    • Intake manifold gaskets and seals.
    • Mass airflow sensor.
    • Positive crankcase ventilation hoses/pipes/tubes.
    • Positive crankcase ventilation oil separator.
    • If smoke is visible 

      Repair or replace the affected gasket, seal, clamp or component as necessary and repeat step 5.

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