Air Injection Control Valve: Service and Repair

Removing And Installing Secondary Air Valve

Technical values







Preliminary work

With engine installed -->

1. Remove high-pressure pump on cylinder bank 5 to 8.
2. Pull off cable plug on solenoid valve for valve lift switchover.
3. Detach the coolant hose if necessary.
4. Remove vacuum pump on cylinder bank 1 to 4.
5. Pull off cable plug on solenoid valve for valve lift switchover.

If cylinder head is replaced -->







6. Remove screw plug with sealing ring. -1-

Information

Component overview










Removing secondary air valve







1. Disconnect secondary-air hoses and pipe.
2. Detach secondary air valve connections.







3. Remove screw -2- and carefully pull the secondary air valve -1 or 3- out of the cylinder head.

Installing secondary air valve







1. Fit secondary air valve with a new, lightly greased sealing ring into the cylinder head.
2. Fit secondary air valve with an M6 screw. -> Tightening torque: 10 Nm (7.5 ftlb.) Fit secondary air valve connections.
3. Fit secondary-air hoses.

Subsequent work

1. Secure the coolant hose if necessary.
2. Fit cable plug on solenoid valve for valve lift switchover.
3. Fit high-pressure pump on cylinder bank 5 to 8.
4. Attach cable plug on solenoid valve for valve lift switchover on cylinder bank 1 to 4.
5. Fit vacuum pump.