Air Injection Check Valve: Service and Repair

1. Disconnect the battery ground cable.
2. Disconnect the air pump cable harness block connector.

Fig. 17 Air Pump Service:

3. Disconnect the inlet and outlet hoses from the air pump, Fig. 17.
4. Loosen the link arm adjustment nut.
5. Loosen the adjusting block bolt.
6. Loosen the the link arm pivot bolt.
7. Loosen the air pump pivot bolt, move the air pump towards the engine and remove the air pump drive belt.
8. Remove the adjusting block bolt.
9. Remove the rear spacer and rear cone, then the pump assembly.
10. Disconnect the hoses to the non-return valve, then remove the valve.
11. Reverse procedure to install the new valve, adjusting the belt until the belt tension is such that a force of 6.4 lbs. (2.9 kg) deflects the belt .22 inches (5.6 mm).