EGR System Cleaning
WARNING:
Avoid breathing fumes and swallowing EGR exhaust deposits when removing components for cleaning as bodily injury may result.
- Turn the ignition off. Remove Exhaust Gas Recirculation (EGR) valve pipe. See EGR VALVE PIPE . Clean and inspect the EGR pipe from the exhaust manifold to the EGR valve. Remove the EGR valve. See EGR VALVE .
- While holding the EGR valve base in your hand, try to rotate the connector housing. Replace the valve that exhibits looseness. Inspect the EGR valve pintle and seat for deposits. Use a cloth or other suitable soft device to remove deposits. Remove all loose particles.
- If deposits are such that pintle and/or base interface cannot be cleaned adequately to allow the pintle to seal against the seat, replace the valve. Damage to the EGR valve base will occur if cleaned with solvents, sharp tools, wire brush, wheel or sand blasting. Cleaning by these methods is not recommended. Install the EGR valve on the engine using a new gasket. Install the EGR valve pipe.