1. Disconnect the ground cable from battery.
2. Remove the collector cover.
NOTE:
Follow the steps below when removing the collector cover.
(1) Pull up the two points at the rear (A).
(2) Pull up the two points at the front (B) while moving them forward.
3. Remove the EGR cooler. 
4. Disconnect the engine coolant hose from the EGR control valve.
5. Disconnect the connector from the EGR control valve.
6. Remove the EGR control valve.
7. Remove the engine coolant hose from EGR control valve.