Charge Air Cooler Diagnosis (Induction System Smoke Test)
Charge Air Cooler Diagnosis (Induction System Smoke Test)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Circuit/System Description
The purpose of the Intake Air Leak Smoke Test is to aid in finding an air leak between the mass air flow sensor and turbocharger inlet. This test will also aid in finding air leaks in the crankcase ventilation system.
Reference Information
Special Tools
* J 41413-200 Evaporative Emission System Tester (EEST)
* GE-41413-SPT High Intensity White Light
Smoke Test Application
Important:
* To operate the EVAP tester, refer to J 41413-200 operation manual.
* Smoke at the EGR valve vent port is normal.
1. Ignition OFF, remove the air filter restriction indicator.
2. Connect the J 41413-200 to the vehicle at the air restrictor indicator port.
3. Place the air filter in a disposable plastic bag in the air cleaner housing to help prevent smoke leakage.
4. Remove the engine cover. Refer to Engine Cover Replacement Service and Repair.
5. Apply smoke continuously with the J 41413-200 while moving all duct work, pipes, and tubes.
6. To improve the visibility of the smoke exiting the engine, observe the suspected leak area from different angles.
7. Inspect for smoke at the following locations:
* Crankcase ventilation hoses and pipes
* Mass air flow intake air ducts
* PCV valve and seals
* Turbocharger inlet and outlet connections
• Replace the affected gasket, seal, or component as necessary.
8. Retest the engine for air leaks.
9. Remove the disposable bag from the air filter. Install the air filter and air filter restriction indicator.
10. Install the engine cover. Refer to Engine Cover Replacement Service and Repair.