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Home >> Oldsmobile >> 2002 >> Bravada AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Emission Systems & Sub-Systems (Diesel) >> Exhaust Gas RECIRCULATION >> Exhaust Gas Recirculation System Cleaning

Exhaust Gas Recirculation System Cleaning

    CAUTION: Avoid breathing fumes and swallowing EGR exhaust deposits when removing components for cleaning as bodily injury may result.
  1. Remove Exhaust Gas Recirculation (EGR) valve.
  2. Depress pintle several times using a pencil eraser or other suitable soft instrument. Pintle should move in and out smoothly. Replace valve if valve exhibits tendencies to stick.
  3. Try to rotate EGR valve electrical connector housing. Repeat for coil housing. Replace valve if valve exhibits any looseness. Inspect EGR valve pintle and seat for deposits. Use a cloth or other suitable soft device to remove deposits. Remove all loose particles. Replace valve if deposits are such that pintle-to-base interface cannot be cleaned adequately to allow pintle to seal against seat. Damage to powdered metal EGR valve base occurs if cleaned with solvents, sharp tools, wire brush or wheel, or sand blasting. Cleaning by these methods is not recommended.
  4. Clean passages with a wire brush. Remove all loose particles.
  5. Install EGR valve.
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