HEXA

ENGINE 188 7. Remove the spring band clamp (2) and discon- nect the hose (1) connecting EGR coolant outlet to the coolant return line. 8. Loosen and remove the hex fla nge bolts (2) to disconne ct the EGR pipe (1) from EGR cooler. 9. Loosen and remove the hex flange bolts to dis- connect the EGR cooler module (1) mounted on the intake manifold. FITMENT For fitment follow reverse procedure of removal. NOTE Use new gasket every time and tighten bolts to specified torque. CAUTION: EGR Valve Actuator Reset need to be activat- ed in Diagnostic Tool whenever EGR Valve Actuator or EGR Module is changed and also in case of some EGR module learning related faults. 17. EGR COOLER BYPASS VALVE (VACUUM SOLENOID VALVE): The EGR Cooler Bypass valve is an electro pneu- matic solenoid switch, which is controlled precisely by the EMS ECU based on the Engine speed, Coolant Temperature and Accelerator pedal posi- tion etc. Vacuum solenoid valve provides variable vacuum levels to drive EGR. LOCATION REMOVAL 1. Remove engine cover. 2. Disconnect all the hose connections & electrical connection from the Vacuum solenoid valve. 3. Remove the mounting bolts of vacuum solenoid valve & take out the vacuum solenoid valve from its location. REFITMENT 1. Fit the Vacuum solenoid valve on the mounting bracket. 2. Tighten its two mounting bolts. 3. Connect the hose connections & electrical con- nector.