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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Control System & Fuel System - 6.6L (LLY) - Troubleshooting & Diagnosis) >> Charge Air Cooler Diagnosis (Full System Air Leak Test) >> Air Pressure Application

Air Pressure Application

WARNING: This page is about a different variant/trim than selected.
CAUTION: Refer to Charge Air Cooler Caution .
  1. Attach the gage/regulator assembly from the J 46091  to the quick disconnect fitting on the J-46091-15. See Special Tools .
  2. Connect the air supply to the air valve on the gage/regulator assembly.
  3. Open the air supply valve slowly, increasing the air pressure in 34-69 kPa (5-10 psi) increments while listening for air leaks.
    4. IMPORTANT:
    • An air leak hissing sound at the EGR valve vent port is normal.
    • For accurate readings you must allow approximately 30 seconds for the air pressure to stabilize.
  4. Continue increasing the air pressure until the air valve is fully open.
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