Lucerne V8-4.6L (2008)
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.
Notice: Refer to Fastener Notice (See: Service Precautions/Vehicle Damage Warnings/Fastener Notice).
3. Install the AIR check valve to exhaust manifold nuts (3).
Tighten the nuts to 9 N.m (80 lb in).