AIR Check Valve/Pipe Replacement - Bank 1

REMOVAL PROCEDURE

CAUTION: Allow the engine to cool before servicing the secondary air injection AIR system in order to reduce the chance of severe burns.




1. Remove the check valve hose clamp.
2. Disconnect the AIR hose from the check valve.
3. Unscrew the check valve from the AIR pipe.
4. Remove the left AIR pipe from the manifold.
5. Before replacing a check valve, test the valve for proper operation.
5.1. Install a vacuum pump to the nipple side of the check valve, on the AIR pump side.
5.2. Pump the vacuum pump to 10 inches Hg, and observe the gage.
5.3. If the vacuum bleeds down to zero within 5 seconds, replace the check valve.

INSTALLATION PROCEDURE

NOTE: Refer to Fastener Notice in Service Precautions.




1. Screw the check valve onto the AIR pipe.

Tighten
Tighten the check valve to the AIR pipe to 23 N.m (17 lb ft).

2. Connect the AIR pipe to the exhaust manifold.

Tighten
Tighten the AIR pipe to the exhaust manifold to 20 N.m (15 lb ft).

3. Install the AIR hose to the check valve.
4. Install the check valve hose clamp.
5. Check the AIR system for proper operation.