For 1990-2009 cars only
- Clean the exhaust manifold in solvent.
- Dry the exhaust manifold with compressed air.
- Inspect the A.I.R. passages for restrictions.
- Inspect the A.I.R. gasket sealing surface for excessive scratches or gouging.
- Inspect the exhaust manifold gasket sealing surfaces for damaged.
- Inspect the take down studs for damaged threads.
- Use a straight edge and a feeler gage and measure the exhaust manifold-to-cylinder head sealing surface for warpage.
Important: Do not reuse the exhaust manifold-to-cylinder head gaskets. Upon installation of the exhaust manifold, install a NEW gasket. A improperly installed gasket or leaking exhaust system may effect OBD II system performance.
| • | Exhaust manifold flanges with warpage in excess of 0.25 mm (0.010 in), must be replaced. |
