Air Injection Check Valve: Service and Repair

SECONDARY AIR INJECTION (AIR) CHECK VALVE REPLACEMENT

REMOVAL PROCEDURE




1. Remove the fuel injector sight shield.
2. Disconnect the engine harness electrical connector (4) from the secondary air injection (AIR) check valve.




3. Disconnect the AIR pipe quick connect fitting (1) from the AIR check valve.




4. Remove the AIR check valve to exhaust manifold nuts (3).
5. Remove the AIR check valve bolts (1).
6. Remove the AIR check valve.
7. Remove and discard the AIR check valve to exhaust manifold gasket (4).
8. Clean the AIR to exhaust manifold gasket sealing surfaces.

INSTALLATION PROCEDURE




1. Install a NEW AIR check valve to exhaust manifold gasket (4).
2. Install the AIR check valve.
3. Install the AIR check valve to exhaust manifold nuts (3).

Notice: Refer to Fastener Notice in Service Precautions.

Tighten
Tighten the nuts to 9 N.m (80 lb in).

4. Install the AIR check valve bolts (1).

Tighten
Tighten the bolts to 9 N.m (80 lb in).




5. Connect the AIR pipe quick connect fitting (1) to the AIR check valve.




6. Connect the engine harness electrical connector (4) to the AIR check valve.
7. Install the fuel injector sight shield.