LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 450 (Engine Controls - Removal & Installation - V6 & V8) >> Emission Systems & Sub-Systems >> EGR System Cleaning

EGR System Cleaning

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, 2003 Buick Regal, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Avoid breathing fumes and swallowing EGR exhaust deposits when removing components for cleaning as bodily injury may result.
  1. Remove the Exhaust Gas Recirculation (EGR) valve. See EGR VALVE .
  2. Depress the pintle several times using a pencil eraser or other suitable soft instrument. The pintle should move in and out smoothly. Replace the valve if the valve exhibits tendencies to stick.
  3. Try to rotate the EGR valve electrical connector housing. Repeat for the coil housing. Replace the valve if the valve exhibits any looseness.
    4. NOTE: Damage to the powdered metal EGR valve base occurs if cleaned with a wire brush, a wire wheel, solvents, sharp tools, or sand blasting. Cleaning by these methods is not recommended.
  4. Inspect the EGR valve pintle and seat for deposits. Use a cloth or other suitable soft device to remove the deposits. Remove all loose particles. Replace the valve if the deposits are such that the pintle to base interface cannot be cleaned adequately to allow the pintle to seal against the seat.
  5. Remove the EGR pipes. Clean the passages with a wire brush. Remove all loose particles. See EGR VALVE PIPE .
  6. Install the EGR valve. See EGR VALVE .
scientia non olet · About LEMON Manuals