Exhaust Gas Recirculation Valve Adapter Pipe Replacement for Chevrolet Optra 2008

1. Drain the engine coolant. Refer to Cooling System Draining and Filling .
2. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
3. Remove the spark plug wires. Refer to Spark Plug Wire Replacement .
4. Disconnect the exhaust gas recirculation (EGR) valve and the coolant temperature sensor (CTS) electrical connectors.
5. Remove the heater return hose at the EGR valve adapter valve.
6. Remove the EGR valve adapter bolts.
7. Remove the EGR valve adapter and gasket.

1. Position the EGR valve adapter and gasket.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the EGR valve adapter retaining bolts.

Tighten

•	Tighten the EGR valve adapter retaining bolts (1) to 20 N·m (15 lb ft).

•	Tighten the EGR valve adapter retaining bolts (2) to 30 N·m (22 lb ft).

3. Install the heater return hose to the EGR valve adapter.
4. Connect the EGR valve and the CTS electrical connectors.
5. Install the spark plug wires. Refer to Spark Plug Wire Replacement .
6. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
7. Refill the engine coolant. Refer to Cooling System Draining and Filling .