Exhaust Gas Recirculation: Service and Repair

Clean Working Conditions

When working on the Exhaust Gas Recirculation (EGR) system, pay careful attention to the following "7 rules" of cleanliness:

• Thoroughly clean all connections and the surrounding area before disconnecting.

• Place parts that have been removed on a clean surface and cover them. Use lint free cloths.

• Carefully cover or seal opened components, if repairs are not performed immediately.

• Only install clean components: Only unpack replacement parts immediately prior to installation. Do not use parts that have been stored loose (for example, in tool boxes, etc.).

• Transport, protective packaging and sealing caps are to be removed only immediately prior to installation.

• During repairs, clean oil from connections and hose ends.

• When the system is open: Avoid working with compressed air if possible. Do not move vehicle unless absolutely necessary.